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Mitsubishi Electric PUHY-P200 Service Handbook
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Mitsubishi Electric PUHY-P200 Service Handbook

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  • Page 2: Safety Precautions

    Safety Precautions Please read the following safety precautions carefully before installing the unit to ensure safety. Indicates a risk of death or serious injury. Indicates a risk of serious injury or structural damage. Make sure that this manual is passed on to the end user to retain for future reference. Retain this manual for future reference.
  • Page 3 Always replace a fuse with one with the cor- To reduce the risk of injury from units falling rect current rating. The use of improperly or falling over, periodically check the instal- rated fuses or a substitution of fuses with lation base for damage.
  • Page 4 Any additional parts must be installed by Plastic bags pose suffocation hazard to the dealer or qualified personnel. Only use children. the parts specified by Mitsubishi Electric. Installation by unauthorized personnel or All drainage work should be performed by use of unauthorized parts or accessories...
  • Page 5 To reduce the risk of pipe damage, refriger- To prevent explosion, do not heat the unit ant leakage, and oxygen deprivation, use with refrigerant gas in the refrigerant circuit. pipes that meet the pipe thickness specifi- To reduce the risk of oxygen deprivation cations, which vary by the type of refriger- and gas poisoning, check for gas leakage ant used, pipe diameter, and pipe material.
  • Page 6 [6] Relocation and Repairs Relocation and Repairs To reduce the risk of refrigerant leakage, To reduce the risk of wire shorting, electric water leakage, injury, electric shock, and leak, electric shock, smoke, or fire, do not fire, units should only be moved or repaired perform maintenance work in the rain.
  • Page 7 Use refrigerant piping and couplings that To reduce the risk of both the breaker on the meet the applicable standards. For refriger- product side and the upstream breaker from ant pipes, use pipes made of phosphorus tripping and causing problems, split the deoxidized copper.

  • Page 8: Table Of Contents

    CONTENTS Chapter 1 Check Before Servicing Preparation for Piping Work........................3 Handling and Characteristics of Piping Materials, Refrigerant, and Refrigerant Oil ....... 5 Working with Refrigerant Piping......................10 Precautions for Wiring ......................... 14 Cautionary notes on installation environment and maintenance............ 16 Chapter 2 Restrictions System Configurations ........................
  • Page 9 CONTENTS Error Code Definitions and Solutions: Codes [7000 - 7999]............226 Chapter 8 Troubleshooting Based on Observed Symptoms MA Remote Controller Problems ...................... 237 ME remote Controller Problems ....................... 241 Refrigerant Control Problems ......................245 Checking Transmission Waveform and for Electrical Noise Interference ........250 Pressure Sensor Circuit Configuration and Troubleshooting Pressure Sensor Problems ..
  • Page 10 Chapter 1 Check Before Servicing Preparation for Piping Work ........................ 3 1-1-1 Read before Servicing ..........................3 1-1-2 Tool Preparation ............................. 4 Handling and Characteristics of Piping Materials, Refrigerant, and Refrigerant Oil...... 5 1-2-1 Piping Materials ............................5 1-2-2 Storage of Piping Materials........................7 1-2-3 Pipe Processing ............................
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  • Page 12: Preparation For Piping Work

    [1-1 Preparation for Piping Work ] Preparation for Piping Work 1 Check Before Servicing 1-1-1 Read before Servicing 1. Check the type of refrigerant used in the system to be serviced. Refrigerant Type Multi air conditioner for building application CITY MULTI YKB-A1 series:R410A 2.

  • Page 13: Tool Preparation

    [1-1 Preparation for Piping Work ] 1-1-2 Tool Preparation Prepare the following tools and materials necessary for installing and servicing the unit. Tools for use with R410A (Adaptability of tools that are for use with R22 or R407C) 1. To be used exclusively with R410A (not to be used if used with R22 or R407C) Tools/Materials Notes Gauge Manifold...

  • Page 14: Handling And Characteristics Of Piping Materials, Refrigerant, And Refrigerant Oil

    [1-2 Handling and Characteristics of Piping Materials, Refrigerant, and Refrigerant Oil ] Handling and Characteristics of Piping Materials, Refrigerant, and Refrigerant Oil 1-2-1 Piping Materials Do not use the existing piping! 1. Copper pipe materials O-material (Annealed) Soft copper pipes (annealed copper pipes). They can easily be bent with hands. 1/2H-material (Drawn) Hard copper pipes (straight pipes).
  • Page 15 [1-2 Handling and Characteristics of Piping Materials, Refrigerant, and Refrigerant Oil ] 4. Thickness and refrigerant type indicated on the piping materials Ask the pipe manufacturer for the symbols indicated on the piping material for new refrigerant. 5. Flare processing (O-material (Annealed) and OL-material only) The flare processing dimensions for the pipes that are used in the R410A system are larger than those in the R22 system.

  • Page 16: Storage Of Piping Materials

    [1-2 Handling and Characteristics of Piping Materials, Refrigerant, and Refrigerant Oil ] 1-2-2 Storage of Piping Materials 1. Storage location Store the pipes to be used indoors. (Warehouse at site or owner's warehouse) If they are left outdoors, dust, dirt, or moisture may infiltrate and contaminate the pipe. 2.

  • Page 17: Characteristics Of The New And Conventional Refrigerants

    [1-2 Handling and Characteristics of Piping Materials, Refrigerant, and Refrigerant Oil ] 1-2-4 Characteristics of the New and Conventional Refrigerants 1. Chemical property As with R22, the new refrigerant (R410A) is low in toxicity and chemically stable nonflammable refrigerant. However, because the specific gravity of vapor refrigerant is greater than that of air, leaked refrigerant in a closed room will accumulate at the bottom of the room and may cause hypoxia.

  • Page 18: Refrigerant Oil

    [1-2 Handling and Characteristics of Piping Materials, Refrigerant, and Refrigerant Oil ] 1-2-5 Refrigerant Oil 1. Refrigerating machine oil in the HFC refrigerant system HFC type refrigerants use a refrigerating machine oil different from that used in the R22 system. Note that the ester oil used in the system has properties that are different from commercially available ester oil.

  • Page 19: Working With Refrigerant Piping

    [1-3 Working with Refrigerant Piping ] Working with Refrigerant Piping 1-3-1 Pipe Brazing No changes have been made in the brazing procedures. Perform brazing with special care to keep foreign objects (such as oxide scale, water, and dust) out of the refrigerant system. Example: Inside the brazed connection Use of no inert gas during brazing Use of inert gas during brazing...

  • Page 20: Air Tightness Test

    [1-3 Working with Refrigerant Piping ] 1-3-2 Air Tightness Test No changes have been made in the detection method. Note that a refrigerant leak detector for R22 will not detect an R410A leak. Halide torch R22 leakage detector 1. Items to be strictly observed Pressurize the equipment with nitrogen up to the design pressure (4.15MPa[601psi]), and then judge the equipment's air tight- ness, taking temperature variations into account.

  • Page 21: Vacuum Drying

    [1-3 Working with Refrigerant Piping ] 1-3-3 Vacuum Drying (Photo1) 15010H (Photo2) 14010 Recommended vacuum gauge: ROBINAIR 14010 Thermistor Vacuum Gauge 1. Vacuum pump with a reverse-flow check valve (Photo1) To prevent the vacuum pump oil from flowing into the refrigerant circuit during power OFF or power failure, use a vacuum pump with a reverse-flow check valve.

  • Page 22: Refrigerant Charging

    [1-3 Working with Refrigerant Piping ] 1-3-4 Refrigerant Charging Cylinder with a siphon Cylinder without a siphon Cylin- Cylin- Cylinder color R410A is pink. Refrigerant charging in the liquid state Valve Valve liquid liquid 1. Reasons R410A is a pseudo-azeotropic HFC blend (boiling point R32=-52°C[-62°F], R125=-49°C[-52°F]) and can almost be handled the same way as a single refrigerant, such as R22.

  • Page 23: Precautions For Wiring

    [1-4 Precautions for Wiring ] Precautions for Wiring Control boxes house high-voltage and high-temperature electrical parts. They may still remain energized or hot after the power is turned off. When opening or closing the front cover of the control box, keep out of contact with the internal parts. Before inspecting the inside of the control box, turn off the power, leave the unit turned off for at least 10 minutes, and check that the voltage of the electrolytic capacitor (inverter main circuit) has dropped to 20 VDC or less.
  • Page 24 [1-4 Precautions for Wiring ] 2) Check the wires are securely fastened to the screw terminals. Screw the screws straight down so as not to damage the screw threads. Hold the two round terminals back to back to ensure that the screw will screw down straight. After tightening the screw, mark a line through the screw head, washer, and terminals with a permanent marker.

  • Page 25: Cautionary Notes On Installation Environment And Maintenance

    [1-5 Cautionary notes on installation environment and maintenance ] Cautionary notes on installation environment and maintenance Salt-resistant unit is resistant to salt corrosion, but not salt-proof. Please note the following when installing and main- taining outdoor units in marine atmosphere. 1) Install the salt-resistant unit out of direct exposure to sea breeze, and minimize the exposure to salt water mist.

  • Page 26: Chapter 2 Restrictions

    Chapter 2 Restrictions System Configurations........................19 Types and Maximum Allowable Length of Cables................20 Switch Settings ........................... 21 M-NET Address Settings ........................22 2-4-1 Address Settings List ..........................22 2-4-2 Outdoor Unit Power Jumper Connector Connection................23 2-4-3 Outdoor Unit Centralized Controller Switch Setting ................23 2-4-4 Room Temperature Detection Position Selection .................
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  • Page 28: System Configurations

    [2-1 System Configurations ] System Configurations 2 Restrictions 1. Table of compatible indoor units (1) High COP combinations The table below summarizes the types of indoor units that are compatible with different types of outdoor units. Outdoor units Composing units Maximum total Maximum Types of connectable...

  • Page 29: Types And Maximum Allowable Length Of Cables

    [2-2 Types and Maximum Allowable Length of Cables ] Types and Maximum Allowable Length of Cables 1. Wiring work (1) Notes 1) Have all electrical work performed by an authorized electrician according to the local regulations and instructions in this man- ual.

  • Page 30: Switch Settings

    [2-3 Switch Settings ] 2) Remote controller wiring MA remote controller ME remote controller Type VCTF, VCTFK, CVV, CVS, VVR, VVF, VCT Shielded cables CVVS, CPEVS, and MVVS Number of 2-core cable 2-core cable cores Cable type 2 *3 0.3 to 1.25mm 2 *3 *5 0.3 to 1.25mm Cable size...

  • Page 31: M-Net Address Settings

    [2-4 M-NET Address Settings ] M-NET Address Settings 2-4-1 Address Settings List 1. M-NET Address settings (1) Address settings table The need for address settings and the range of address setting depend on the configuration of the system. Unit or controller Address setting Setting method Facto-...

  • Page 32: Outdoor Unit Power Jumper Connector Connection

    [2-4 M-NET Address Settings ] 2-4-2 Outdoor Unit Power Jumper Connector Connection There are limitations on the total number of units that are connectable to each refrigerant system. Refer to the DATABOOK for details. System configu- Connection to Power supply unit Group operation Power supply switch connector connection ration...

  • Page 33: Start/Stop Control Of Indoor Units

    [2-4 M-NET Address Settings ] 2-4-5 Start/Stop Control of Indoor Units Each indoor unit (or group of indoor units) can be controlled individually by setting SW 1-9 and 1-10. *4 *5 Setting (SW1) Operation of the indoor unit when the operation is resumed after the unit was Function stopped Power ON/OFF by...

  • Page 34: Various Control Methods Using The Signal Input/Output Connector On Outdoor Unit

    [2-4 M-NET Address Settings ] 2-4-7 Various Control Methods Using the Signal Input/Output Connector on Outdoor Unit (1) Various connection options Terminal Type Usage Function to be Option used Input Prohibiting cooling/heating operation (thermo OFF) by an external DEMAND (level) CN3D Adapter for input to the outdoor unit.
  • Page 35 [2-4 M-NET Address Settings ] (2) Example of wiring connection CAUTION 1) Wiring should be covered by insulation tube with supplementary insulation. 2) Use relays or switches with IEC or equivalent standard. 3) The electric strength between accessible parts and control circuit should have 2750V or more. (1) CN51 (2) CN3S Outdoor unit...
  • Page 36 [2-4 M-NET Address Settings ] (5) CN3K External input Outdoor unit adapter Relay circuit control board CN3K Preparations in the field Maximum cable length is 10m X : Energy-saving mode command X : Relay Contact rating voltage >= DC15V Contact rating current >= 0.1A Minimum appicable load =<...

  • Page 37: Demand Control Overview

    [2-5 Demand Control Overview ] Demand Control Overview (1) General outline of control Demand control is performed by using the external signal input to the 1-2 and 1-3 pins of CN3D on the outdoor units (OC, OS1, and OS2). Between 2 and 12 steps of demand control is possible by setting DIP SW6-8 on the outdoor units (OC, OS1, and OS2). DipSW6-8 Demand control switch Input to CN3D *2...
  • Page 38 [2-5 Demand Control Overview ] (*3) 2) When SW6-8 on one outdoor unit in one refrigerant circuit system is set to ON (4 levels of on-DEMAND) CN3D 1-2P CN3D 1-3P Open Short-circuit Open 100% (No DEMAND) Short-circuit 0% (Compressor OFF) *3.

  • Page 39: System Connection Example

    [2-6 System Connection Example ] System Connection Example Examples of typical system connection are shown below. Refer to the Installation Manual that came with each device or controller for details. (1) An example of a system to which an MA remote controller is connected System Address start up for in- Connection to the system controller...
  • Page 40 [2-6 System Connection Example ] - 31 - HWE14040...

  • Page 41: Example System With An Ma Remote Controller

    [2-7 Example System with an MA Remote Controller ] Example System with an MA Remote Controller 2-7-1 Single Refrigerant System (Automatic Indoor/Outdoor Address Startup) (1) Sample control wiring Interlock operation with the ventilation unit Leave the male Leave the male Leave the male Group Group...
  • Page 42 [2-7 Example System with an MA Remote Controller ] MA remote controller function selection or the installation (4) Wiring method manual for the MA remote controller for the setting meth- 1) Indoor/outdoor transmission line od.) Group operation of indoor units Daisy-chain terminals M1 and M2 on the terminal block for indoor-outdoor transmission line (TB3) on the outdoor To perform a group operation of indoor units (IC), daisy-...

  • Page 43: Single Refrigerant System With Two Or More Lossnay Units

    [2-7 Example System with an MA Remote Controller ] 2-7-2 Single Refrigerant System with Two or More LOSSNAY Units (1) Sample control wiring Interlock operation with the ventilation unit Leave the male Leave the male Leave the male Group Group connector on connector on connector on...
  • Page 44 [2-7 Example System with an MA Remote Controller ] Connect terminals M1 and M2 on the terminal block (4) Wiring method (TB5) on the indoor unit (IC) to the appropriate terminals 1) Indoor/outdoor transmission line on the terminal block (TB5) on LOSSNAY (LC). (Non-po- larized two-wire) Same as 2-7-1 Interlock setting between the indoor units and LOSS-...

  • Page 45: Grouped Operation Of Units In Separate Refrigerant Circuits

    [2-7 Example System with an MA Remote Controller ] 2-7-3 Grouped Operation of Units in Separate Refrigerant Circuits (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector Leave the male Leave the male Group Group from CN41 to CN40.
  • Page 46 [2-7 Example System with an MA Remote Controller ] a power failure, daisy-chain TB7 of OC, OS1, and OS2. (4) Wiring method (If there is a problem with the outdoor unit whose power 1) Indoor/outdoor transmission line jumper was moved from CN41 to CN40, centralized con- trol is not possible, even if TB7's are daisy-chained).

  • Page 47: System With A Connection Of System Controller To Centralized Control Transmission Line

    [2-7 Example System with an MA Remote Controller ] 2-7-4 System with a Connection of System Controller to Centralized Control Transmission Line (1) Sample control wiring An example of a system in which a system controller is connected to the transmission cable for the centralized control system and the power is supplied from the outdoor unit Interlock operation with the ventilation unit...
  • Page 48 [2-7 Example System with an MA Remote Controller ] trol is not possible, even if TB7's are daisy-chained). (4) Wiring method c) When connecting TB7, only commence after checking 1) Indoor/outdoor transmission line that the voltage is below 20 VDC. Only use shielded cables.

  • Page 49: System With A Connection Of System Controller To Indoor-Outdoor Transmission Line

    [2-7 Example System with an MA Remote Controller ] 2-7-5 System with a Connection of System Controller to Indoor-Outdoor Transmission Line (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector Leave the male Leave the male from CN41 to CN40.
  • Page 50 [2-7 Example System with an MA Remote Controller ] same refrigerant circuit, connect the transmission line for (4) Wiring method centralized control to TB7 on the OC (Note a). To maintain centralized control even during an OC failure or a power fail- 1) Indoor/outdoor transmission line ure, daisy-chain TB7 of OC, OS1, and OS2.

  • Page 51: Example System With An Me Remote Controller

    [2-8 Example System with an ME Remote Controller ] Example System with an ME Remote Controller 2-8-1 System with a Connection of System Controller to Centralized Control Transmission Line (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector Leave the male Leave the male from CN41 to CN40.
  • Page 52 [2-8 Example System with an ME Remote Controller ] When 2 remote controllers are connected to the sys- (4) Wiring method 1) Indoor/outdoor transmission line Refer to the section on Switch Setting. Same as 2-7-1 Performing a group operation (including the group Shielded cable connection operation of units in different refrigerant circuits).

  • Page 53: Example System With An Ma And An Me Remote Controller

    [2-9 Example System with an MA and an ME Remote Controller ] Example System with an MA and an ME Remote Controller 2-9-1 System with a Connection of System Controller to Centralized Control Transmission Line (1) Sample control wiring Leave the male Leave the male Move the male connector connector on...
  • Page 54 [2-9 Example System with an MA and an ME Remote Controller ] Same as 2-7-1 (4) Wiring method Group operation of indoor units 1) Indoor/outdoor transmission line Same as 2-7-1 Same as 2-7-1 4) M-NET remote controller wiring Shielded cable connection Same as 2-7-1 Same as 2-7-1 When 2 remote controllers are connected to the sys-...

  • Page 55: 2-10 Restrictions On Refrigerant Pipes

    [2-10 Restrictions on Refrigerant Pipes ] 2-10 Restrictions on Refrigerant Pipes 2-10-1 Restrictions on Refrigerant Pipe Length (1) P200 - P500YKB models Outdoor unit Branch header First branch (Branch joint) Indoor Indoor Indoor Branch joint Indoor Indoor Indoor Unit: m [ft] Allowable length of Operation Pipe sections...
  • Page 56 [2-10 Restrictions on Refrigerant Pipes ] (2) P400 - P1350YSKB models Provide a trap on the pipe (gas pipe only) within 2 m from the Note1 Install the pipe that connects the branch pipe and the outdoor units in joint pipe if the total length of the pipe that connects the joint the way that it has a downward inclination toward the branch pipe.
  • Page 57 [2-10 Restrictions on Refrigerant Pipes ] When the vertical separation between indoor units exceeds 15 m Outdoor unit above indoor unit example 1 example 2 Increase the size of the pipe indicated by Outdoor Outdoor Increase the size of the pipe indicated by Outdoor unit unit...

  • Page 58: Restrictions On Refrigerant Pipe Size

    [2-10 Restrictions on Refrigerant Pipes ] 2-10-2 Restrictions on Refrigerant Pipe Size (1) Diameter of the refrigerant pipe between the outdoor unit and the first branch (outdoor unit pipe size) Outdoor unit set name Liquid pipe size (mm) [inch] Gas pipe size (mm) [inch] (total capacity) 200 model ø9.52 [3/8"]...
  • Page 59 [2-10 Restrictions on Refrigerant Pipes ] (3) Size of the refrigerant pipe between the branches for connection to indoor units Total capacity of the Liquid pipe size (mm) [inch] Gas pipe size (mm) [inch] downstream units - 140 ø9.52 [3/8"] ø15.88 [5/8"] P141 - P200 ø9.52 [3/8"]...

  • Page 60: Chapter 3 Major Components, Their Functions And Refrigerant Circuits

    Chapter 3 Major Components, Their Functions and Refrigerant Circuits External Appearance and Refrigerant Circuit Components of Outdoor Unit........ 53 3-1-1 External Appearance of Outdoor Unit ....................53 3-1-2 Outdoor Unit Refrigerant Circuits......................56 Outdoor Unit Refrigerant Circuit Diagrams..................59 Functions of the Major Components of Outdoor Unit ..............61 Functions of the Major Components of Indoor Unit ................
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  • Page 62: External Appearance And Refrigerant Circuit Components Of Outdoor Unit

    [3-1 External Appearance and Refrigerant Circuit Components of Outdoor Unit ] External Appearance and Refrigerant Circuit Components of 3 Major Components, Their Functions and Refrigerant Circuits Outdoor Unit 3-1-1 External Appearance of Outdoor Unit (1) PUHY-P200, P250YKB-A1 Fan guard Fan guard Fin guard Fin guard Control box...
  • Page 63 [3-1 External Appearance and Refrigerant Circuit Components of Outdoor Unit ] (2) PUHY-P300, P350, P400YKB-A1 Fan guard Fan guard Fin guard Fin guard Control box Control box Heat Heat exchanger exchanger Front panels Front panels Side panel Side panel - 54 - HWE14040...
  • Page 64 [3-1 External Appearance and Refrigerant Circuit Components of Outdoor Unit ] (3) PUHY-P450, P500YKB-A1 Fan guards Fan guards Fans Fans Fin guard Fin guard Fan box Fan box Control box Control box Heat Heat exchanger exchanger Front panels Front panels Side panel Side panel - 55 -...

  • Page 65: Outdoor Unit Refrigerant Circuits

    [3-1 External Appearance and Refrigerant Circuit Components of Outdoor Unit ] 3-1-2 Outdoor Unit Refrigerant Circuits (1) PUHY-P200, P250YKB-A1 Check valve (CV1) Solenoid valve (SV10) High-pressure switch (63H1) Solenoid valve (SV11) High-pressure sensor (63HS1) 4-way valve (21S4b) 4-way valve (21S4a)
  • Page 66 [3-1 External Appearance and Refrigerant Circuit Components of Outdoor Unit ] (2) PUHY-P300, P350, P400YKB-A1 Check valve (CV1) Solenoid valve High-pressure (SV10) switch (63H1) Solenoid valve (SV11) 4-way valve High-pressure (21S4b) sensor (63HS1) 4-way valve (21S4a) Linear expansion valve (LEV1) Accumulator Linear expansion Low-pressure...
  • Page 67 [3-1 External Appearance and Refrigerant Circuit Components of Outdoor Unit ] (3) PUHY-P450, P500YKB-A1 2-way valve (SV5b) 4-way valve High-pressure (21S4a) sensor (63HS1) High-pressure 4-way valve switch (63H1) Solenoid valve 4-way valve (21S4c) (SV10) High-pressure (21S4b) Check valve Solenoid valve check joint (CJ1) (CV1) (SV11)

  • Page 68: Outdoor Unit Refrigerant Circuit Diagrams

    [3-2 Outdoor Unit Refrigerant Circuit Diagrams ] Outdoor Unit Refrigerant Circuit Diagrams (1) PUHY-P200, P250 models 63LS 21S4b 21S4a TH11 63H1 MOTOR 63HS1 SV1a SV11 SV10 Comp LEV2b LEV2a LEV1 (2) PUHY-P300, P350, P400 models 63LS 21S4b 21S4a TH11 63H1...
  • Page 69 [3-2 Outdoor Unit Refrigerant Circuit Diagrams ] (3) PUHY-P450, P500 models 21S4c TH11 21S4b HEX2 21S4a FAN2 (HEX2) MOTOR 63H1 63HS1 63LS FAN1 (HEX1) SV10 SV11 SV1a MOTOR Comp LEV2b HEX1 SV5b LEV2a ST2 BV2 LEV1 - 60 - HWE14040...

  • Page 70: Functions Of The Major Components Of Outdoor Unit

    [3-3 Functions of the Major Components of Outdoor Unit ] Functions of the Major Components of Outdoor Unit Part Symbols Notes Usage Specifications Check method name (functions) Com- Adjusts the amount of circulating P200, P250 models pressor (Comp1) refrigerant by adjusting the operat- Low-pressure shell scroll ing frequency based on the oper- compressor...
  • Page 71 [3-3 Functions of the Major Components of Outdoor Unit ] Part Symbols Notes Usage Specifications Check method name (functions) Thermis- 1) Detects discharge air temper- Degrees Celsius Resistance check (Discharge) ature = 7.465k = 4057 2) Provides high-pressure pro- 25/120 tection 7.465 4057...
  • Page 72 [3-3 Functions of the Major Components of Outdoor Unit ] Part Symbols Notes Usage Specifications Check method name (functions) Sole- SV1a 1) High/low pressure bypass at AC220-240V Continuity check noid Discharge- Open while being powered/ with a tester start-up and stopping, and valve suction closed while not being pow-...

  • Page 73: Functions Of The Major Components Of Indoor Unit

    [3-4 Functions of the Major Components of Indoor Unit ] Functions of the Major Components of Indoor Unit Part Symbol Notes Usage Specification Check method Name (functions) Linear 1) Adjusts superheat at the DC12V Refer to the section expan- Opening of stepping motor "Continuity Test with a indoor heat exchanger sion valve...

  • Page 74: Chapter 4 Electrical Components And Wiring Diagrams

    Chapter 4 Electrical Components and Wiring Diagrams Outdoor Unit Circuit Board Arrangement..................67 4-1-1 Outdoor Unit Control Box........................67 4-1-2 Fan Box..............................70 Outdoor Unit Circuit Board Components ..................71 4-2-1 Control Board............................71 4-2-2 M-NET Board (Transmission Power Supply Board) ................72 4-2-3 INV Board .............................
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  • Page 76: Outdoor Unit Circuit Board Arrangement

    Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that the voltage of the capacitor in the main circuit has dropped to 20 VDC or less. (1) PUHY-P200, P250, P300, P350, P400YKB-A1 Capacitor...
  • Page 77 [4-1 Outdoor Unit Circuit Board Arrangement ] (2) PUHY-P450, P500YKB-A1 Fan board INV board Control board Noise filter M-NET board Terminal block for transmission line (TB3, TB7) Terminal block Ground terminal Capacitor Board for power supply (TB1) DC Reactor - 68 - HWE14040...
  • Page 78 [4-1 Outdoor Unit Circuit Board Arrangement ] 1) Exercise caution not to damage the bottom and the front panel of the control box. Damage to these parts affect the water- proof and dust proof properties of the control box and may result in damage to its internal components. 2) Faston terminals have a locking function.

  • Page 79: Fan Box

    [4-1 Outdoor Unit Circuit Board Arrangement ] 4-1-2 Fan Box (1) PUHY-P450, P500YKB-A1 FAN board Connect board Note 1) 1. Handle the fan box with care. If the front or the bottom panel becomes damaged, water or dust may enter the fan box, dam- aging its internal parts.

  • Page 80: Outdoor Unit Circuit Board Components

    [4-2 Outdoor Unit Circuit Board Components ] Outdoor Unit Circuit Board Components 4-2-1 Control Board 16 VDC CN4/4A GND(FAN INV board 1) 5 VDC output CN2/2A 17 VDC CN332 Serial communication 17 VDC signal input Serial communication 18 VDC output CN801 GND(INV board) GND(FAN INV board 2)

  • Page 81: M-Net Board (Transmission Power Supply Board)

    [4-2 Outdoor Unit Circuit Board Components ] 4-2-2 M-NET Board (Transmission Power Supply Board) CNS2 CNIT Transmission line input/output for 12VDC input CN04 centralized control system CN102 Bus voltage input 5VDC input Power supply output for centralized control system Power supply detection output Indoor/outdoor transmission line input/output Power supply ON/OFF Grounding...

  • Page 82: Inv Board

    4-2-3 INV Board (1) PUHY-P200, P250, P300, P350, P400YKB-A1 1) When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components. Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that the capacitor voltage (inverter main circuit) has dropped to 20 VDC or less.
  • Page 83 [4-2 Outdoor Unit Circuit Board Components ] (2) PUHY-P450, P500YKB-A1 FT-R21 SC-P Bus voltage output(P) Bus voltage output(P) CNRY R001 SC-L FT001 Inrush current limiting Oversurrent CNCT4A DC bus current input Neutral point output(P) relay input detection resistor Electric current sensor (DC) output (CT3) LED5...

  • Page 84: Fan Board

    [4-2 Outdoor Unit Circuit Board Components ] 4-2-4 Fan Board LED1 LED4 Lit: Inverter operation Microcomputer in operation (Lit) Blinking: Inverter error RSH02 1) When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components. Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that the capacitor voltage (inverter main circuit) has dropped to 20 VDC or less.

  • Page 85: Noise Filter

    [4-2 Outdoor Unit Circuit Board Components ] 4-2-5 Noise Filter (1) PUHY-P200, P250, P300, P350, P400YKB-A1 Output Output (Rectified L2-N current) (Rectified L2-N current) Surge absorber circuit Surge absorber circuit Short circuit Short circuit Grounding F1,F2,F3,F4 Fuse 250VAC 6.3A Output...
  • Page 86 [4-2 Outdoor Unit Circuit Board Components ] (2) PUHY-P450, P500YKB-A1 CN1B CN1A Input Output Surge absorber circuit Surge absorber circuit Short circuit Short circuit Grounding Grounding CAUTION FOR HIGH VOLTAGE Fuse 250VAC 6.3A TB24 Input/output Output Grounding TB23 Input/output TB22 TB21 Fuse Input/output...

  • Page 87: Capacitor Board

    [4-2 Outdoor Unit Circuit Board Components ] 4-2-6 Capacitor Board (1) PUHY-P450, P500YKB-A1 CN101 CN103 Input(L2) Output Input(N) (Rectified L3-N current) Input(L3) CN107 Output (L3-N rectifier) CN102 Power supply detection signal output CN104 Output (L3-N rectifier) SC-P Bus voltage input(P) note.1 CN106 SC-N...

  • Page 88: Connect Board

    [4-2 Outdoor Unit Circuit Board Components ] 4-2-7 Connect Board (1) PUHY-P450, P500YKB-A1 1) When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components. Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that the capacitor voltage (inverter main circuit) has dropped to 20 VDC or less.

  • Page 89: Outdoor Unit Electrical Wiring Diagrams

    [4-3 Outdoor Unit Electrical Wiring Diagrams ] Outdoor Unit Electrical Wiring Diagrams (1) PUHY-P200, P250, P300, P350, P400 models - 80 - HWE14040...
  • Page 90 [4-3 Outdoor Unit Electrical Wiring Diagrams ] (2) PUHY-P450, P500 models - 81 - HWE14040...

  • Page 91: Transmission Booster Electrical Wiring Diagrams

    [4-4 Transmission Booster Electrical Wiring Diagrams ] Transmission Booster Electrical Wiring Diagrams Terminal block for power supply (TB1) 250V 5A Red Red Red Black White White Green/Yellow 220 - 240VAC Varistor Noise filter Black White White White White Varistor Green Black Stabilized power supply Blue...

  • Page 92: Chapter 5 Control

    Chapter 5 Control Dipswitch Functions and Factory Settings ..................85 5-1-1 Outdoor Unit Switch Functions and Factory Settings ................85 5-1-2 Indoor Unit Switch Functions and Factory Settings ................89 5-1-3 Remote Controller Switch Functions and Factory Settings..............91 Outdoor Unit Control .......................... 93 5-2-1 Overview ...............................
  • Page 93 - 84 - HWE14040...

  • Page 94: Dipswitch Functions And Factory Settings

    [5-1 Dipswitch Functions and Factory Settings ] Dipswitch Functions and Factory Settings 5 Control 5-1-1 Outdoor Unit Switch Functions and Factory Settings (1) Control board Function according to switch setting Units that require Switch Function Switch setting timing switch setting (Note 2) Unit address setting Set to 00 or 51-100 with the dial switch...
  • Page 95 [5-1 Dipswitch Functions and Factory Settings ] (2) Additional dipswitch settings at time of shipment Function according to switch setting Units that require Switch Function Switch setting timing switch setting OFF (LED3 Unlit) ON (LED3 Lit) (Note 2) Refer to the following page(s). [9 LED Status 1-10 Self-diagnosis/operation SW6-10:...
  • Page 96 *The new function is supported on most units that are manufactured in December of 2012 and later. Depending on the model, this function may be added on later date. Ask your dealer for further details. (3) INV board Functions are switched with the following connector. 1) PUHY-P200, P250, P300, P350, P400YKB-A1 Function according to connec- Connector Function...
  • Page 97 [5-1 Dipswitch Functions and Factory Settings ] 2) PUHY-P450, P500YKB-A1 Function according to switch setting Switch Function Switch setting timing SW001 Detects or ignores the following errors Error detec- Error detec- Anytime after power on ACCT/DCCT sensor fault (5301 Detail tion enabled tion disable No.

  • Page 98: Indoor Unit Switch Functions And Factory Settings

    [5-1 Dipswitch Functions and Factory Settings ] 5-1-2 Indoor Unit Switch Functions and Factory Settings (1) Dipswitches 1) SW1,3 Function according to switch setting Switch setting timing Switch Function Notes Set to ON (built-in sensor on the remote controller) Room temperature Built-in sensor on Indoor unit inlet on All Fresh (PEFY-VMH-F) model units...
  • Page 99 [5-1 Dipswitch Functions and Factory Settings ] (2) Address switch Actual indoor unit address setting varies in different systems. Refer to the installation manual for the outdoor unit for details on how to make the address setting. Each address is set with a combination of the settings for the 10's digit and 1's digit. (Example) When setting the address to "3", set the 1's digit to 3, and the 10's digit to 0.

  • Page 100: Remote Controller Switch Functions And Factory Settings

    [5-1 Dipswitch Functions and Factory Settings ] 5-1-3 Remote Controller Switch Functions and Factory Settings (1) MA simple remote controller (PAC-YT52CRA) There are switches on the back of the top case. Remote controller Main/Sub and other function settings are performed using these switches.
  • Page 101 [5-1 Dipswitch Functions and Factory Settings ] (2) ME remote controller (PAR-F27MEA) Set the address of the remote controller with the rotary switch. Rotary switch 10's digit 1's digit (left) (right) Remote controller unit Example: In case of address 108 Address setting range Setting method Main remote controller...

  • Page 102: Outdoor Unit Control

    [5-2 Outdoor Unit Control ] Outdoor Unit Control 5-2-1 Overview The outdoor units are designated as OC, OS1 and OS2 in the order of capacity from large to small (if two or more units have the same capacity, in the order of address from small to large). The setting of outdoor unit can be verified by using the self-diagnosis switch (SW4).

  • Page 103: Refrigerant Bypass Control

    [5-2 Outdoor Unit Control ] 5-2-5 Refrigerant Bypass Control Bypass solenoid valves (SV1a), which bypass the high- and low- pressure sides, perform the following functions. (1) Bypass solenoid valve (SV1a) (ON = Open), (SV9) (ON = Open) SV1a Operation When starting-up the compressor of each ON for 4 minutes.

  • Page 104: Frequency Control

    [5-2 Outdoor Unit Control ] SV11 Operation When Continuous heating P200-P400: Top part of heat exchanger is Other than on the left mode being defrosted. P450-P500: Right part of heat exchanger is being defrosted. 5-2-6 Frequency Control Depending on the capacity required, the frequency of the compressor is controlled to keep constant evaporation temperature (0°C [32°F] = 0.71 MPa [103 psi]) during cooling operation, and condensing temperature (49°C [120°F] = 2.88 MPa [418 psi]) during heating operation.

  • Page 105: Defrost Operation Control

    [5-2 Outdoor Unit Control ] 5-2-7 Defrost Operation Control (1) Starting the defrost operation The defrost cycle will start when all of the three conditions (outside temperature, cumulative compressor operation time, and pipe temperature) under <Condition 1>, <Condition 2>, or <Condition 3> are met. Condition 1 Condition 2 Condition 3...

  • Page 106: Continuous Heating Mode Control

    [5-2 Outdoor Unit Control ] (3) Stopping the defrost operation The defrost cycle ends when 12 minutes have passed since the beginning of the cycle, or when the pipe temperature (TH3) has been continuously detected for 4 minutes (when SW4 (916) is set to OFF) or 2 minutes (when SW4 (916) is set to ON) that exceeds the values in the table below.

  • Page 107: Refrigerant Recovery Control

    [5-2 Outdoor Unit Control ] 5-2-9 Refrigerant Recovery Control Recovery of refrigerant is performed during heating operation to prevent the refrigerant from accumulating inside the unit while it is stopped (unit in fan mode), or inside the indoor unit that is in cooling mode or in heating mode with thermo off. It is also performed during cooling operation to prevent an excessive amount of refrigerant from accumulating in the outdoor heat ex- changer.

  • Page 108: Outdoor Unit Fan Control

    [5-2 Outdoor Unit Control ] 5-2-10 Outdoor Unit Fan Control (1) Control method Depending on the capacity required, the rotation speed of the outdoor unit fan is controlled by the inverter, targeting a constant evaporation temperature of (0°C [32°F]= 0.71 MPa [103 psi]) during cooling operation and constant condensing temperature of (49°C [120°F]= 2.88 MPa [418 psi]) during heating operation.
  • Page 109 [5-2 Outdoor Unit Control ] (2) P400 - P900YSKB models Initial startup mode starts. The compressor on the OC starts up. 60Hz The total operating load of the indoor unit after 5 minutes of operation is P250 or above. The compressor on the OC starts up. The compressor on the OC remains in operation, and the compressor on the OS starts up.
  • Page 110 [5-2 Outdoor Unit Control ] (3) P950 - P1350YSKB models Initial startup mode starts. The compressor on the OC starts up. 60Hz The total operating load of the indoor unit after 5 minutes of operation is P250 or above. The total operating load of the indoor unit after 5 minutes of operation is between P250 and P1000.

  • Page 111: Emergency Operation Mode

    [5-2 Outdoor Unit Control ] 5-2-14 Emergency Operation Mode 1. Problems with the outdoor unit Emergency operation mode is a mode in which outdoor units that are operating normally take over the operation of the out- door units that are experiencing problems. (P400-P900YSKB models go into an emergency operation mode when one out- door unit is in trouble, and P950-P1350YSKB models go into an emergency operation mode when one or two outdoor units are in trouble.) This mode can be started by performing an error reset via the remote controller.
  • Page 112 [5-2 Outdoor Unit Control ] Emergency operation pattern (3 outdoor units) OC failure OS1 failure OS2 failure OC, OS1 failure OC, OS2 failure OS1, OS2 failure pattern pattern pattern pattern pattern pattern Trouble Normal Normal Trouble Trouble Normal Normal Trouble Normal Trouble Normal...
  • Page 113 [5-2 Outdoor Unit Control ] (2) Starting the emergency operation (When the OS is in trouble) 1) A communication error occurs. → An emergency operation starts in approximately six minutes. Error codes that permit an emergency operation (Applicable to both OC and OS) Error codes that permit an Trouble source Error code description...

  • Page 114: Operation Mode

    [5-2 Outdoor Unit Control ] 5-2-15 Operation Mode (1) Indoor unit operation mode The operation mode can be selected from the following 5 modes using the remote controller. Cooling mode Heating mode Dry mode Fan mode Stopping mode (2) Outdoor unit operation mode Cooling mode All indoor units in operation are in cooling mode.

  • Page 115: Operation Flowcharts

    [5-3 Operation Flowcharts ] Operation Flowcharts 5-3-1 Operation Sequence Flowchart (1) Indoor unit (cooling, heating, dry, fan mode) Start Normal operation Error Breaker Unit in the stopped state turned on From outdoor unit Operation SW turned on 1. Protection function self-holding cancelled.
  • Page 116 [5-3 Operation Flowcharts ] (2) Outdoor unit (cooling and heating modes) Start Normal operation Error Breaker Unit in the stopped state turned on "HO" / "PLEASE WAIT" blinks on the remote controller *Note 1 Indoor units registered to the remote controller From indoor unit Operation command...

  • Page 117: Actions Performed In Different Modes

    [5-3 Operation Flowcharts ] 5-3-2 Actions Performed in Different Modes (1) Cooling operation Cooling operation Normal operation During test run mode 4-way valve OFF Unit in the stopped state Indoor unit fan *Note 1 operation Test run mode Thermostat ON 3-minute restart prevention 1.
  • Page 118 [5-3 Operation Flowcharts ] (2) Heating operation Normal operation Defrost operation Heating operation Unit in the stopped state *Note 1,2 During test run mode Defrost operation 4-way valve ON 4-way valve OFF 1. Indoor unit fan stops 2. Inverter defrost frequency control Test run mode 3.
  • Page 119 [5-3 Operation Flowcharts ] (3) Dry operation Dry operation Normal operation Thermostat ON 4-way valve OFF Unit in the stopped state Test run mode *Note 2 Thermostat ON Suction temperature 18°C[64°F] *Note 1 1. Indoor unit fan stop 1. Outdoor unit (compressor) 2.

  • Page 120: Chapter 6 Test Run

    Chapter 6 Test Run Read before Test Run........................113 MA and ME Remote Controller Functions and Specifications ............. 114 6-2-1 Function/Specification Comparison ....................114 6-2-2 Local Remote Controller Selection Tips....................114 Making the Group and Interlock Settings from an ME Remote Controller ........115 6-3-1 Overview .............................
  • Page 121 HWE14040 - 112 -...

  • Page 122: Read Before Test Run

    [6-1 Read before Test Run ] Read before Test Run 6 Test Run (1) Check for refrigerant leak and loose cables and connectors. (2) When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components.

  • Page 123: Ma And Me Remote Controller Functions And Specifications

    [6-2 MA and ME Remote Controller Functions and Specifications ] MA and ME Remote Controller Functions and Specifications There are two types of remote controllers: ME remote controller, which is connected on the indoor-outdoor transmission line, and MA remote controller, which is connected to each indoor unit. 6-2-1 Function/Specification Comparison *1*2...

  • Page 124: Making The Group And Interlock Settings From An Me Remote Controller

    [6-3 Making the Group and Interlock Settings from an ME Remote Controller ] Making the Group and Interlock Settings from an ME Remote Controller 6-3-1 Overview Make the following settings to perform a group operation of units that are connected to different outdoor units or to manually set up the indoor/outdoor unit address.
  • Page 125 [6-3 Making the Group and Interlock Settings from an ME Remote Controller ] (A) Group Settings (B) Interlock Settings Bring up the Group Setting window. Bring up the Interlock Setting window. -Press and hold buttons [FILTER] and -Press button ] to bring up the following display. simultaneously for 2 seconds to bring up the display as Press again to go back to the Group Setting window as shown shown below.

  • Page 126: Address Search

    [6-3 Making the Group and Interlock Settings from an ME Remote Controller ] 6-3-3 Address Search To search for the address of indoor units that have been entered into the remote controller, follow steps (A) To search group settings (B) Interlock setting search After performing step , proceed as follows: Bring up the Group Setting window.

  • Page 127: Address Deletion

    [6-3 Making the Group and Interlock Settings from an ME Remote Controller ] 6-3-4 Address Deletion The addresses of the indoor units that have been entered into the remote controller can be deleted by deleting the group settings. The interlock settings between units can be deleted by deleting the interlock settings. Follow the steps in section 6-3-3 Address Search to find the address to be deleted and perform deletion with the address being displayed in the display window.

  • Page 128: Selecting Remote Controller Functions From An Me Remote Controller

    [6-4 Selecting Remote Controller Functions from an ME Remote Controller ] Selecting Remote Controller Functions from an ME Remote Controller In the remote controller function selection mode, the settings for four types of functions can be made or changed as necessary. 1) Skip-Auto-Mode setting The automatic operation mode that is supported by some simultaneous cooling/heating type units can be made unselectable via the ME remote controller.
  • Page 129 [6-4 Selecting Remote Controller Functions from an ME Remote Controller ] [Operation Procedures] 1. Press the [ON/OFF] button on the remote controller to bring the unit to a stop. The display will appear as shown in the previous page (Normal display).

  • Page 130: Making Interlock Settings From An Ma Remote Controller

    [6-5 Making Interlock Settings from an MA Remote Controller ] Making Interlock Settings from an MA Remote Controller LOSSNAY interlock setting (Make this setting only when necessary.) 6-5-1 MA Remote Controller (PAR-31MAA) This setting is required only when the operation of City Multi units is interlocked with LOSSNAY units. This setting is not available for the Mr.

  • Page 131: Ma Remote Controller (Par-21Maa)

    [6-5 Making Interlock Settings from an MA Remote Controller ] 6-5-2 MA Remote Controller (PAR-21MAA) * When the upper controller is connected, make the setting using the upper controller. NOTE: When using LOSSNAY units in conjunction, interlock the addresses of all indoor units within the group and address of LOSSNAY units. Perform this operation to enter the interlock setting between the LOSSNAY and the indoor units to which the remote controller is connected, or to search and delete registered information.
  • Page 132 [6-5 Making Interlock Settings from an MA Remote Controller ] < 2. Search Procedures > To search for the LOSSNAY unit that is interlocked with a particular indoor unit, enter the address of the indoor unit into the remote controller that is connected to it.

  • Page 133: Ma Simple Remote Controller

    [6-5 Making Interlock Settings from an MA Remote Controller ] 6-5-3 MA Simple Remote Controller Make this setting only when interlocked operation with LOSSNAY is necessary with CITY MULTI models. Perform this operation when you want to register the LOSSNAY, confirm the registered units, or delete the registered units controlled by the remote controller.
  • Page 134 [6-5 Making Interlock Settings from an MA Remote Controller ] <1. Registration procedure> Set the address of the indoor unit to be interlocked with the LOSSNAY unit using the buttons. (01 to 50) After setting, press the button and set the Lossnay address you want to register by operating the buttons.
  • Page 135 [6-5 Making Interlock Settings from an MA Remote Controller ] <2. Confirmation procedure> Set the address of the indoor unit connected by the remote controller whose LOSSNAY you want to confirm using the buttons. (01 to 50) Press the button and button simultaneously for 2 seconds, and check the LOSSNAY address registered at the set indoor unit address.

  • Page 136: Changing The Room Temperature Detection Position

    [6-6 Changing the Room Temperature Detection Position ] Changing the Room Temperature Detection Position 1. Selecting the position of temperature detection (Factory setting: SW1-1 on the controller board on the indoor unit is set to OFF.) To use the built-in sensor on the remote controller, set the SW1-1 on the controller board on the indoor unit to ON. Some models of remote controllers are not equipped with a built-in temperature sensor.

  • Page 137: Test Run Method

    [6-7 Test Run Method ] Test Run Method 6-7-1 MA Remote Controller (PAR-31MAA) (1) Remote controller button functions Function button The assignment of the function buttons varies depending on the screen. Follow the guide screen that will appear at the bottom of the screen (from the left, F1, F2, F3, and F4).
  • Page 138 [6-7 Test Run Method ] (3) Entering the maintenance information Model name, serial number, and dealer's phone number can be registered to the remote controller to be displayed on the screen when an error occurs. Step 1: Switching the remote controller screen to "Maintenance information" (Requires the maintenance password.

  • Page 139: Ma Remote Controller (Par-21Maa)

    [6-7 Test Run Method ] 6-7-2 MA Remote Controller (PAR-21MAA) The figure shows an MA remote controller (PAR-21MAA). ON/OFF button Set Temperature buttons Down Fan Speed button TIME SUN MON TUE WED THU FRI SAT TIMER AFTER AFTER ERROR CODE FUNCTION FILTER WEEKLY...

  • Page 140: Operation Characteristics And Refrigerant Charge

    [6-8 Operation Characteristics and Refrigerant Charge ] Operation Characteristics and Refrigerant Charge It is important to have a clear understanding of the characteristics of refrigerant and the operating characteristics of air conditioners before attempting to adjust the refrigerant amount in a given system. The following table shows items of particular importance.

  • Page 141: The Amount Of Refrigerant To Be Added

    [6-9 Evaluating and Adjusting Refrigerant Charge ] 6-9-3 The Amount of Refrigerant to Be Added The amount of refrigerant that is shown in the table below is factory-charged to the outdoor units. The amount necessary for extended pipe (field piping) is not included and must be added on site. Outdoor unit model P200 P250...
  • Page 142 [6-9 Evaluating and Adjusting Refrigerant Charge ] 1) Maximum refrigerant charge There is a limit to the amount of refrigerant that can be charged into a unit. Regardless of the amount yielded by the formula above, observe the maximum refrigerant charge in the table below. Total index of the outdoor units P200 P250...
  • Page 143 [6-9 Evaluating and Adjusting Refrigerant Charge ] (2) Example: PUHY-P350YKB-A1 a: ø9.52 Indoor 1: P125 A: ø12.7 40 m 10 m 2: P100 B: ø9.52 10 m b: ø9.52 3: P40 C: ø9.52 15 m c: ø6.35 10 m 4: P32 D: ø9.52 10 m d: ø9.52...

  • Page 144: Refrigerant Charge Adjustment Mode

    [6-9 Evaluating and Adjusting Refrigerant Charge ] 6-9-4 Refrigerant Charge Adjustment Mode Follow the procedures below to add or extract refrigerant as necessary depending on the operation mode. When the function switch (SW4 (922)) on the main board on the outdoor unit (OC only) is turned to ON, the unit goes into the refrigerant amount adjust mode, and the following sequence is followed.
  • Page 145 [6-9 Evaluating and Adjusting Refrigerant Charge ] Start Turn on SW4 (922) on the OC. Put all indoor units in the test run mode *Refer to the previous page for *Notes 1-4 in the chart. and run the units in cooling mode. Has the initial start-up mode been completed? Has it been at least...

  • Page 146: 6-10 The Following Symptoms Are Normal

    [6-10 The Following Symptoms Are Normal ] 6-10 The Following Symptoms Are Normal Remote controller Symptoms Cause display The indoor unit does not start "Cooling (heating)" The unit cannot perform a heating (cooling) operation when other indoor after starting cooling (heating) icon blinks on the units on the same refrigerant system, are performing a cooling (heating) operation.

  • Page 147: Standard Operation Data (Reference Data)

    [6-11 Standard Operation Data (Reference Data) ] 6-11 Standard Operation Data (Reference Data) 6-11-1 Single Unit (Standard) Outdoor unit model PUHY-P200YKB-A1 PUHY-P250YKB-A1 Indoor 26.7°C/19.4°C [80°F/67°F] 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating)

  • Page 148: Cooling Operation

    [6-11 Standard Operation Data (Reference Data) ] PUHY-P300YKB-A1 PUHY-P350YKB-A1 Outdoor unit model Indoor 26.7°C/19.4°C [80°F/67°F] 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] 35°C/- [95°F/-] Indoor 21.1°C/- [70vF/?] 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit...
  • Page 149 [6-11 Standard Operation Data (Reference Data) ] Outdoor unit model PUHY-P400YKB-A1 PUHY-P450YKB-A1 Indoor 26.7°C/19.4°C [80°F/67°F] 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit...
  • Page 150 [6-11 Standard Operation Data (Reference Data) ] Outdoor unit model PUHY-P500YKB-A1 Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation Conditions Model 125/125/125/125...

  • Page 151: Dual Unit Combination (Standard)

    [6-11 Standard Operation Data (Reference Data) ] 6-11-2 Dual Unit Combination (Standard) Packaged unit model PUHY-P400YSKB-A1 Outdoor unit model PUHY-P200YKB-A1 PUHY-P200YKB-A1 Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit...
  • Page 152 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P450YSKB-A1 Outdoor unit model PUHY-P200YKB-A1 PUHY-P250YKB-A1 Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
  • Page 153 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P500YSKB-A1 Outdoor unit model PUHY-P250YKB-A1 PUHY-P250YKB-A1 Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
  • Page 154 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P550YSKB-A1 Outdoor unit model PUHY-P250YKB-A1 PUHY-P300YKB-A1 Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
  • Page 155 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P600YSKB-A1 Outdoor unit model PUHY-P250YKB-A1 PUHY-P350YKB-A1 Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
  • Page 156 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P650YSKB-A1 Outdoor unit model PUHY-P300YKB-A1 PUHY-P350YKB-A1 Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
  • Page 157 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P700YSKB-A1 Outdoor unit model PUHY-P350YKB-A1 PUHY-P350YKB-A1 Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
  • Page 158 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P750YSKB-A1 Outdoor unit model PUHY-P350YKB-A1 PUHY-P400YKB-A1 Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
  • Page 159 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P800YSKB-A1 Outdoor unit model PUHY-P350YKB-A1 PUHY-P450YKB-A1 Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
  • Page 160 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P850YSKB-A1 Outdoor unit model PUHY-P400YKB-A1 PUHY-P450YKB-A1 Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
  • Page 161 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P900YSKB-A1 Outdoor unit model PUHY-P450YKB-A1 PUHY-P450YKB-A1 Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...

  • Page 162: Triple Unit Combination (Standard)

    [6-11 Standard Operation Data (Reference Data) ] 6-11-3 Triple Unit Combination (Standard) Packaged unit model PUHY-P950YSKB-A1 Outdoor unit model PUHY-P250YKB-A1 PUHY-P300YKB-A1 PUHY-P400YKB-A1 Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected...
  • Page 163 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P1000YSKB-A1 Outdoor unit model PUHY-P300YKB-A1 PUHY-P300YKB-A1 PUHY-P400YKB-A1 Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
  • Page 164 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P1050YSKB-A1 Outdoor unit model PUHY-P300YKB-A1 PUHY-P350YKB-A1 PUHY-P400YKB-A1 Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
  • Page 165 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P1100YSKB-A1 Outdoor unit model PUHY-P350YKB-A1 PUHY-P350YKB-A1 PUHY-P400YKB-A1 Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
  • Page 166 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P1150YSKB-A1 Outdoor unit model PUHY-P350YKB-A1 PUHY-P350YKB-A1 PUHY-P450YKB-A1 Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
  • Page 167 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P1200YSKB-A1 Outdoor unit model PUHY-P350YKB-A1 PUHY-P400YKB-A1 PUHY-P450YKB-A1 Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1- [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
  • Page 168 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P1250YSKB-A1 Outdoor unit model PUHY-P350YKB-A1 PUHY-P450YKB-A1 PUHY-P450YKB-A1 Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
  • Page 169 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P1300YSKB-A1 Outdoor unit model PUHY-P400YKB-A1 PUHY-P450YKB-A1 PUHY-P450YKB-A1 Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
  • Page 170 [6-11 Standard Operation Data (Reference Data) ] Packaged unit model PUHY-P1350YSKB-A1 Outdoor unit model PUHY-P450YKB-A1 PUHY-P450YKB-A1 PUHY-P450YKB-A1 Indoor 26.7°C/19.4°C [80°F/67°F] Ambient temperature DB/WB (cooling) Outdoor 35°C/- [95°F/-] Indoor 21.1°C/- [70°F/-] Ambient temperature DB/WB (heating) Outdoor 8.3°C/6.1°C [47°F/43°F] Number of units connected Unit Indoor unit Number of units in operation...
  • Page 171 [6-11 Standard Operation Data (Reference Data) ] - 162 - HWE14040...

  • Page 172: Chapter 7 Troubleshooting Using Error Codes

    Chapter 7 Troubleshooting Using Error Codes Error Code and Preliminary Error Code Lists ................165 Error Code Definitions and Solutions: Codes [0 - 999] ..............169 7-2-1 Error Code [0403] ..........................169 7-2-2 Error Code [0404] ..........................170 Error Code Definitions and Solutions: Codes [1000 - 1999] ............171 7-3-1 Error Code [1102] ..........................
  • Page 173 7-7-3 Error Code [5110] ..........................200 7-7-4 Error Code [5120] ..........................201 7-7-5 Error Code [5201] ..........................201 7-7-6 Error Code [5301] Detail Code 115..................... 202 7-7-7 Error Code [5301] Detail Code 117..................... 202 7-7-8 Error Code [5301] Detail Code 119..................... 203 7-7-9 Error Code [5301] Detail Code 120.....................

  • Page 174: Error Code And Preliminary Error Code Lists

    [7-1 Error Code and Preliminary Error Code Lists ] Error Code and Preliminary Error Code Lists 7 Troubleshooting Using Error Codes Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code 4300 0403 4305 Serial communication error/Panel communication error (page 169)
  • Page 175 [7-1 Error Code and Preliminary Error Code Lists ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code Backup operation [101] IPM error (page 194) [104] Short-circuited IPM/Ground fault (page 195) [105] Overcurrent error due to short-circuited motor (page 196) 4250...
  • Page 176 [7-1 Error Code and Preliminary Error Code Lists ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code Heat exchanger outlet pipe (page 199) 5111 1274 Temperature sensor fault temperature (TH11) Backup operation 5120 1248 Temperature sensor fault...
  • Page 177 [7-1 Error Code and Preliminary Error Code Lists ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code 7101 Capacity code setting error (page 227) 7102 Wrong number of connected units (page 228) 7105 Address setting error (page 229)

  • Page 178: Error Code Definitions And Solutions: Codes [0 - 999]

    [7-2 Error Code Definitions and Solutions: Codes [0 - 999] ] Error Code Definitions and Solutions: Codes [0 - 999] 7-2-1 Error Code [0403] 1. Error code definition Serial communication error 2. Error definition and error detection method Serial communication error between the control board and the INV board on the compressor, and between the control board and the Fan board Detail code 1: Between the control board and the INV board Detail code 5, 6: Between the control board and the Fan board...

  • Page 179: Error Code [0404]

    [7-2 Error Code Definitions and Solutions: Codes [0 - 999] ] 7-2-2 Error Code [0404] 1. Error code definition A control communication reception error 2. Error definition and error detection method Indoor controller board Abnormal if data cannot be read normally from the nonvolatile memory of the indoor controller board. 3.

  • Page 180: Error Code Definitions And Solutions: Codes [1000 - 1999]

    [7-3 Error Code Definitions and Solutions: Codes [1000 - 1999] ] Error Code Definitions and Solutions: Codes [1000 - 1999] 7-3-1 Error Code [1102] 1. Error code definition Discharge temperature fault 2. Error definition and error detection method 1) If the discharge temperature of 120 °C [248°F] or more is detected during the above operation (the first detection), the outdoor unit stops once, turns to anti-restart mode for 3 minutes, and restarts after 3 minutes automatically.

  • Page 181: Error Code [1301]

    [7-3 Error Code Definitions and Solutions: Codes [1000 - 1999] ] 7-3-2 Error Code [1301] 1. Error code definition Low pressure fault 2. Error definition and error detection method When starting the compressor from Stop Mode for the first time if low pressure reads 0.098MPa [14psi] immediately before start-up, the operation immediately stops.

  • Page 182: Error Code [1302] (During Operation)

    [7-3 Error Code Definitions and Solutions: Codes [1000 - 1999] ] 7-3-3 Error Code [1302] (during operation) 1. Error code definition High pressure fault 1 (Outdoor unit) 2. Error definition and error detection method 1) If the pressure of 3.78MPa [548psi] or higher is detected by the pressure sensor during operation (the first detection), the out- door stops once, turns to antirestart mode for 3 minutes, and restarts after 3 minutes automatically.

  • Page 183: Error Code [1302] (At Startup)

    [7-3 Error Code Definitions and Solutions: Codes [1000 - 1999] ] 7-3-4 Error Code [1302] (at startup) 1. Error code definition High pressure fault 2 (Outdoor unit) 2. Error definition and error detection method If the pressure of 0.098MPa [14psi] or lower is registered on the pressure sensor immediately before start-up, it will trigger an abnormal stop, and error code "1302"...

  • Page 184: Error Code Definitions And Solutions: Codes [2000 - 2999]

    [7-4 Error Code Definitions and Solutions: Codes [2000 - 2999] ] Error Code Definitions and Solutions: Codes [2000 - 2999] 7-4-1 Error Code [2500] (Models with a drain sensor) 1. Error code definition Drain sensor submergence 2. Error definition and error detection method 1) If an immersion of the drain sensor in the water is detected while the unit is in any mode other than the Cool/Dry mode and when the drain pump goes from OFF to ON, this condition is considered preliminary water leakage.

  • Page 185: Error Code [2500] (Models With A Float Switch)

    [7-4 Error Code Definitions and Solutions: Codes [2000 - 2999] ] 7-4-2 Error Code [2500] (Models with a float switch) 1. Error code definition Drain sensor submergence 2. Error definition and error detection method 1) If an immersion of the float switch in the water is detected while the unit is in any mode other than the Cool/Dry mode and when the drain pump goes from OFF to ON, this condition is considered preliminary water leakage.

  • Page 186: Error Code [2502] (Models With A Drain Sensor)

    [7-4 Error Code Definitions and Solutions: Codes [2000 - 2999] ] 7-4-3 Error Code [2502] (Models with a drain sensor) 1. Error code definition Drain pump fault 2. Error definition and error detection method 1) Make the drain sensor thermistor self-heat. If the temperature rise is small, it is interpreted that the sensor is immersed in water.

  • Page 187: Error Code [2502] (Models With A Float Switch)

    [7-4 Error Code Definitions and Solutions: Codes [2000 - 2999] ] 7-4-4 Error Code [2502] (Models with a float switch) 1. Error code definition Drain pump fault 2. Error definition and error detection method 1) The immersion of sensor tip in water is detected by the ON/OFF signal from the float switch. Submergence of the sensor When it is detected that the float switch has been ON for 15 seconds, it is interpreted that the sensor tip is immersed in water.

  • Page 188: Error Code [2503]

    [7-4 Error Code Definitions and Solutions: Codes [2000 - 2999] ] 7-4-5 Error Code [2503] 1. Error code definition Drain sensor (Thd) fault 2. Error definition and error detection method If the open or short circuit of the thermistor has been detected for 30 seconds, this condition is considered to be a preliminary error, and the unit goes into the 3-minute restart delay mode.

  • Page 189: Error Code [2600]

    [7-4 Error Code Definitions and Solutions: Codes [2000 - 2999] ] 7-4-6 Error Code [2600] 1. Error code definition Water leakage 2. Cause, check method and remedy Check that water does not leak from the pipes in such as the humidifier. 7-4-7 Error Code [2601] 1.

  • Page 190: Error Code Definitions And Solutions: Codes [3000 - 3999]

    [7-5 Error Code Definitions and Solutions: Codes [3000 - 3999] ] Error Code Definitions and Solutions: Codes [3000 - 3999] 7-5-1 Error Code [3121] 1. Error code definition Out-of-range outside air temperature 2. Error definition and error detection method When the thermistor temperature of -28°C[-18°F] or below has continuously been detected for 3 minutes during heating op- eration (during compressor operation), the unit makes an error stop and "3121"...

  • Page 191: Error Code Definitions And Solutions: Codes [4000 - 4999]

    [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] Error Code Definitions and Solutions: Codes [4000 - 4999] 7-6-1 Error Code [4102] 1. Error code definition Open phase 2. Error definition and error detection method An open phase of the power supply (L1 phase, N phase) was detected at power on. The L3 phase current is outside of the specified range.

  • Page 192: Error Code [4106]

    [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-2 Error Code [4106] 1. Error code definition <Transmission power supply fault Error detail code FF (Outdoor unit)> 2. Error definition and error detection method Transmission power output failure 3.

  • Page 193: Error Code [4115]

    [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-4 Error Code [4115] 1. Error code definition Power supply signal sync error 2. Error definition and error detection method The frequency cannot be determined when the power is switched on. 3.

  • Page 194: Error Code [4121]

    [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-6 Error Code [4121] 1. Error code definition Function setting error 2. Error source, cause, check method and remedy Error source Cause Check method and remedy Outdoor unit (1) Dip switch setting error on the control board Check the SW6-1 setting on the control board (2) Connector connection error on the control Check that nothing is connected to the connector...

  • Page 195: Error Code [4124]

    [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-7 Error Code [4124] 1. Error code definition Electric system not operate due to damper abnormality 2. Error definition and error detection method When the damper is not located at the designated position. 3.

  • Page 196: Error Codes [4220, 4225, 4226] Detail Code 108

    [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-8 Error Codes [4220, 4225, 4226] Detail Code 108 1. Error code definition Abnormal bus voltage drop (Detail code 108) 2. Error definition and error detection method If Vdc 289V or less is detected during Inverter operation. (S/W detection) 3.

  • Page 197: Error Codes [4220, 4225, 4226] Detail Code 109

    [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 4225 Check the voltage at CNVDC on the Fan board while the inverter is stopped and if it is 420 V or above, check the following items. 1) Check the voltage at CN72 on the control board. →Go to 3). 2) Check the noise filter coil connections and for coil burnout.

  • Page 198: Error Code [4220] Detail Code 110

    [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-10 Error Code [4220] Detail Code 110 1. Error code definition VDC error (Detail code 110) 2. Error definition and error detection method BUS voltage error When Vdc is equal to or greater than 814 volts (hardware detection) If a voltage drop of the 12 V power supply (CNRY) of the relay on the INV board is detected (INV30YC only) 3.

  • Page 199: Error Code [4220] Detail Code 123

    [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-12 Error Code [4220] Detail Code 123 1. Error code definition Voltage boost control error (Detail code 123)(outdoor unit) 2. Error definition and error detection method When a drop in power supply voltage or a malfunction in the booster circuit is detected 3.

  • Page 200: Error Codes [4220, 4225, 4226] Detail Code 131

    [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-14 Error Codes [4220, 4225, 4226] Detail Code 131 1. Error code definition Low bus voltage at startup (Detail code 131) 2. Error definition and error detection method When Vdc 160 V is detected just before the inverter operation.

  • Page 201: Error Code [4230] Detail Code 126

    [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-16 Error Code [4230] Detail Code 126 1. Error code definition DCL temperature fault (Detail code 126)(outdoor unit) 2. Error definition and error detection method When DCL temperature that equals or exceeds 170˚C is detected (applicable to INV30YC only) 3.

  • Page 202: Error Code [4240]

    [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-17 Error Code [4240] 1. Error code definition Overload protection 2. Error definition and error detection method If the output current of "(Iac) >Imax (Arms)" or "THHS > TOL" is continuously detected for 10 minutes during inverter operation. refer to the following page(s).

  • Page 203: Error Codes [4250, 4255, 4256] Detail Code 101

    [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-18 Error Codes [4250, 4255, 4256] Detail Code 101 1. Error code definition IPM error (Detail code 101) 2. Error definition and error detection method In the case of 4250 If an overcurrent is detected by the overcurrent detection resistor RSH (R001 when INV30YC) on the INV board.

  • Page 204: Error Codes [4250, 4255, 4256] Detail Code 104

    [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-19 Error Codes [4250, 4255, 4256] Detail Code 104 1. Error code definition Short-circuited IPM/Ground fault (Detail code 104) 2. Error definition and error detection method When IPM/IGBT short damage or grounding on the load side is detected just before starting the inverter. 3.

  • Page 205: Error Codes [4250, 4255, 4256] Detail Code 105

    [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-20 Error Codes [4250, 4255, 4256] Detail Code 105 1. Error code definition Overcurrent error due to short-circuited motor (Detail code 105) 2. Error definition and error detection method When a short is detected on the load side just before starting the inverter operation.

  • Page 206: Error Code [4250] Detail Codes 121, 128, And 122

    [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-22 Error Code [4250] Detail Codes 121, 128, and 122 1. Error code definition DCL overcurrent error (H/W) (Detail code 121 and 128)(outdoor unit) DCL overcurrent error (S/W) (Detail code 122) (outdoor unit) 2.

  • Page 207: Error Code Definitions And Solutions: Codes [5000 - 5999]

    [7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ] Error Code Definitions and Solutions: Codes [5000 - 5999] 7-7-1 Error Codes [5101, 5102, 5103, 5104] 1. Error code definition 5101 Return air temperature sensor (TH21) fault (Indoor unit) Return air temperature sensor (TH4) fault (OA processing unit) 5102 Pipe temperature sensor (TH22) fault (Indoor unit)

  • Page 208: Error Codes [5102,5103,5104,5105,5106,5107,5109,5111]

    [7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-7-2 Error Codes [5102,5103,5104,5105,5106,5107,5109,5111] 1. Error code definition 5102 HIC bypass circuit outlet temperature sensor (TH2) fault (Outdoor unit) 5103 Heat exchanger outlet temperature sensor (TH3) fault (Outdoor unit) 5104 Discharge temperature sensor (TH4) fault (Outdoor unit) 5105...

  • Page 209: Error Code [5110]

    [7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 3. Cause, check method and remedy Cause Check method and remedy Thermistor failure Check thermistor resistance. Pinched lead wire Check for pinched lead wire. Torn wire coating Check for wire coating. A pin on the male connector is missing or Check connector.

  • Page 210: Error Code [5120]

    [7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-7-4 Error Code [5120] 1. Error code definition DCL temperature sensor circuit fault (Detail code 01)(outdoor unit) 2. Error definition and error detection method When an open phase or a short circuit of the temperature sensor is detected immediately before inverter startup or during operation (applicable to INV30YC only) 3.

  • Page 211: Error Code [5301] Detail Code 115

    [7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-7-6 Error Code [5301] Detail Code 115 1. Error code definition ACCT sensor fault (Detail code 115) 2. Error definition and error detection method When the formula "output current < 1.5 Arms" remains satisfied for 10 seconds while the inverter is in operation. 3.

  • Page 212: Error Code [5301] Detail Code 119

    [7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-7-8 Error Code [5301] Detail Code 119 1. Error code definition Open-circuited IPM/Loose ACCT connector (Detail code 119) 2. Error definition and error detection method Presence of enough current cannot be detected during the self-diagnostic operation immediately before inverter startup. 3.

  • Page 213: Error Code [5301] Detail Code 127

    [7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-7-10 Error Code [5301] Detail Code 127 1. Error code definition DCL electric current circuit error (Detail code 127)(outdoor unit) 2. Error definition and error detection method When an abnormal value in the DCL electric current sensor detection circuit is detected 3.

  • Page 214: Error Codes [5305, 5306] Detail Code 133

    [7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-7-12 Error Codes [5305, 5306] Detail Code 133 1. Error code definition Position detection error during operation (Detail code 133) 2. Error definition and error detection method An error from a motor sensor is detected during fan moter operation. 3.

  • Page 215: Error Code Definitions And Solutions: Codes [6000 - 6999]

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] Error Code Definitions and Solutions: Codes [6000 - 6999] 7-8-1 Error Code [6201] 1. Error code definition Remote controller board fault (nonvolatile memory error) 2. Error definition and error detection method This error is detected when the data cannot be read out from the built-in nonvolatile memory on the remote controller.

  • Page 216: Error Code [6600]

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-3 Error Code [6600] 1. Error code definition Address overlap 2. Error definition and error detection method An error in which signals from more than one indoor units with the same address are received The address and attribute that appear on the remote controller indicate the controller that detected the error.

  • Page 217: Error Code [6602]

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-5 Error Code [6602] 1. Error code definition Transmission processor hardware error 2. Error definition and error detection method Although "0" was surely transmitted by the transmission processor, "1" is displayed on the transmission line. The address/attribute appeared on the display on the remote controller indicates the controller where an error oc- curred.

  • Page 218: Error Code [6603]

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-6 Error Code [6603] 1. Error code definition Transmission line bus busy error 2. Error definition and error detection method Generated error when the command cannot be transmitted for 4-10 minutes in a row due to bus-busy Generated error when the command cannot be transmitted to the transmission line for 4-10 minutes in a row due to noise The address/attribute appeared on the display on the remote controller indicates the controller where an error oc- curred.

  • Page 219: Error Code [6607] Error Source Address = Outdoor Unit (Oc)

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-8 Error Code [6607] Error Source Address = Outdoor Unit (OC) 1. Error code definition No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).

  • Page 220: Error Code [6607] Error Source Address = Indoor Unit (Ic)

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-9 Error Code [6607] Error Source Address = Indoor Unit (IC) 1. Error code definition No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).

  • Page 221: Error Code [6607] Error Source Address = Lossnay (Lc)

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-10 Error Code [6607] Error Source Address = LOSSNAY (LC) 1. Error code definition No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).

  • Page 222: Error Code [6607] Error Source Address = Me Remote Controller

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-11 Error Code [6607] Error Source Address = ME Remote Controller 1. Error code definition No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).

  • Page 223: Error Code [6607] Error Source Address = System Controller

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-12 Error Code [6607] Error Source Address = System Controller 1. Error code definition No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).

  • Page 224: Error Code [6607] All Error Source Addresses

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-13 Error Code [6607] All Error Source Addresses 1. Error code definition No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).

  • Page 225: Error Code [6607] No Error Source Address

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-14 Error Code [6607] No Error Source Address 1. Error code definition No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).

  • Page 226: Error Code [6608]

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-15 Error Code [6608] 1. Error code definition No response error 2. Error definition and error detection method When no response command is returned although acknowledgement (ACK) is received after transmission, an error is detect- When the data is transmitted 10 times in a row with 3 seconds interval, an error is detected on the transmission side.

  • Page 227: Error Code [6831]

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-16 Error Code [6831] 1. Error code definition MA controller signal reception error (No signal reception) 2. Error definition and error detection method Communication between the MA remote controller and the indoor unit is not done properly. No proper data has been received for 3 minutes.

  • Page 228: Error Code [6832]

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-17 Error Code [6832] 1. Error code definition MA remote controller signal transmission error (Synchronization error) 2. Error definition and error detection method MA remote controller and the indoor unit is not done properly. Failure to detect opening in the transmission path and unable to send signals Indoor unit: 3 minutes Remote controller: 6 seconds...

  • Page 229: Error Code [6833]

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-18 Error Code [6833] 1. Error code definition MA remote controller signal transmission error (Hardware error) 2. Error definition and error detection method Communication between the MA remote controller and the indoor unit is not done properly. An error occurs when the transmitted data and the received data differ for 30 times in a row.

  • Page 230: Error Code [6834]

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-19 Error Code [6834] 1. Error code definition MA controller signal reception error (Start bit detection error) 2. Error definition and error detection method Communication between the MA remote controller and the indoor unit is not done properly. No proper data has been received for 2 minutes.

  • Page 231: Error Code [6840]

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-20 Error Code [6840] 1. Error code definition A control communication reception error 2. Error definition and error detection method Indoor/outdoor unit communication error (Signal receiving error) Abnormal if indoor controller board could not receive any signal normally for 6 minutes after turning the power on Abnormal if indoor controller board could not receive any signal normally for 3 minutes.

  • Page 232: Error Code [6842]

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-22 Error Code [6842] 1. Error code definition A control communication transmission/reception hardware trouble 2. Error definition and error detection method Indoor/outdoor unit communication error (Transmitting error) Abnormal if "1" receiving is detected 30 times continuously though indoor controller board has transmitted "0". 3.

  • Page 233: Error Code [6843]

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-23 Error Code [6843] 1. Error code definition A control communication start bit detection error 2. Error definition and error detection method Indoor/outdoor unit communication error (Signal receiving error) Abnormal if indoor controller board could not receive any signal normally for 6 minutes after turning the power on.

  • Page 234: Error Code [6846]

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-24 Error Code [6846] 1. Error code definition Start-up time over 2. Error definition and error detection method Start-up time over The unit cannot finish start-up process within 4 minutes after power on. 3.

  • Page 235: Error Code Definitions And Solutions: Codes [7000 - 7999]

    [7-9 Error Code Definitions and Solutions: Codes [7000 - 7999] ] Error Code Definitions and Solutions: Codes [7000 - 7999] 7-9-1 Error Code [7100] 1. Error code definition Total capacity error 2. Error definition and error detection method The model total of indoor units in the system with one outdoor unit exceeds limitations. 3.

  • Page 236: Error Code [7101]

    [7-9 Error Code Definitions and Solutions: Codes [7000 - 7999] ] 7-9-2 Error Code [7101] 1. Error code definition Capacity code setting error 2. Error definition and error detection method Connection of incompatible (wrong capacity code) indoor unit or outdoor unit 3.

  • Page 237: Error Code [7102]

    [7-9 Error Code Definitions and Solutions: Codes [7000 - 7999] ] 7-9-3 Error Code [7102] 1. Error code definition Wrong number of connected units 2. Error definition and error detection method The number of connected indoor units is "0" or exceeds the allowable value. 3.

  • Page 238: Error Code [7105]

    [7-9 Error Code Definitions and Solutions: Codes [7000 - 7999] ] 7-9-4 Error Code [7105] 1. Error code definition Address setting error 2. Error definition and error detection method Erroneous setting of OC unit address 3. Cause, check method and remedy Error source Cause Check method and remedy...

  • Page 239: Error Code [7110]

    [7-9 Error Code Definitions and Solutions: Codes [7000 - 7999] ] 7-9-6 Error Code [7110] 1. Error code definition Connection information signal transmission/reception error 2. Error definition and error detection method The given indoor unit is inoperable because it is not properly connected to the outdoor unit in the same system. 3.

  • Page 240: Error Code [7113]

    [7-9 Error Code Definitions and Solutions: Codes [7000 - 7999] ] 7-9-8 Error Code [7113] 1. Error code definition Function setting error (improper connection of CNTYP) 2. Error source, cause, check method and remedy Error source Cause Check method and remedy Outdoor unit Wiring fault (Detail code 15)

  • Page 241: Error Code [7117]

    [7-9 Error Code Definitions and Solutions: Codes [7000 - 7999] ] 7-9-9 Error Code [7117] 1. Error code definition Model setting error 2. Error source, cause, check method and remedy Error source Cause Check method and remedy Outdoor unit Wiring fault (Detail code 15) Loose connectors, short-circuit, con- Check the connector CNTYP5 on the control board for...

  • Page 242: Error Code [7130]

    [7-9 Error Code Definitions and Solutions: Codes [7000 - 7999] ] 7-9-10 Error Code [7130] 1. Error code definition Incompatible unit combination 2. Error definition and error detection method The check code will appear when the indoor units with different refrigerant systems are connected. 3.
  • Page 243 [7-9 Error Code Definitions and Solutions: Codes [7000 - 7999] ] - 234 - HWE14040...

  • Page 244: Chapter 8 Troubleshooting Based On Observed Symptoms

    Chapter 8 Troubleshooting Based on Observed Symptoms MA Remote Controller Problems..................... 237 8-1-1 The LCD Does Not Light Up....................... 237 8-1-2 The LCD Momentarily Lights Up and Then Goes Off................. 238 8-1-3 "HO" and "PLEASE WAIT" Do Not Go Off the Screen............... 239 8-1-4 Air Conditioning Units Do Not Operate When the ON Button Is Pressed.
  • Page 245 8-11 Measures for Refrigerant Leakage ....................281 8-12 Compressor Replacement Instructions..................283 8-13 Troubleshooting Problems Using the LED Status Indicators on the Outdoor Unit ....285 - 236 - HWE14040...

  • Page 246: Ma Remote Controller Problems

    [8-1 MA Remote Controller Problems ] MA Remote Controller Problems 8 Troubleshooting Based on Observed Symptoms 8-1-1 The LCD Does Not Light Up. 1. Phenomena Even if the operation button on the remote controller is pressed, the display remains unlit and the unit does not start run- ning.(Power indicator ( ) is unlit and no lines appear on the remote controller.) 2.

  • Page 247: The Lcd Momentarily Lights Up And Then Goes Off

    [8-1 MA Remote Controller Problems ] 8-1-2 The LCD Momentarily Lights Up and Then Goes Off. 1. Phenomena When the remote controller operation SW is turned on, the operation status briefly appears on the display, then it goes off, and the display lights out immediately, and the unit stops. 2.

  • Page 248: Ho" And "Please Wait" Do Not Go Off The Screen

    [8-1 MA Remote Controller Problems ] 8-1-3 "HO" and "PLEASE WAIT" Do Not Go Off the Screen. 1. Phenomena "HO" or "PLEASE WAIT" display on the remote controller does not disappear, and no operation is performed even if the button is pressed.

  • Page 249: Air Conditioning Units Do Not Operate When The On Button Is Pressed

    [8-1 MA Remote Controller Problems ] 8-1-4 Air Conditioning Units Do Not Operate When the ON Button Is Pressed. 1. Phenomena Even if the operation button on the remote controller is pressed, the indoor and the outdoor units do not start running. 2.

  • Page 250: Me Remote Controller Problems

    [8-2 ME remote Controller Problems ] ME remote Controller Problems 8-2-1 The LCD Does Not Light Up. 1. Phenomena Even if the operation button on the remote controller is pressed, the display remains unlit and the unit does not start running. (Power indicator does not appear on the screen.) 2.

  • Page 251: The Lcd Momentarily Lights Up And Then Goes Off

    [8-2 ME remote Controller Problems ] 8-2-2 The LCD Momentarily Lights Up and Then Goes Off. 1. Phenomena When the remote controller operation SW is turned on, a temporary operation display is indicated, and the display lights out immediately. 2. Cause 1) The power is not supplied to the indoor unit.

  • Page 252: Ho" Does Not Go Off The Screen

    [8-2 ME remote Controller Problems ] 8-2-3 "HO" Does Not Go Off the Screen. 1. Phenomena "HO" display on the remote controller does not disappear, and no operation is performed even if the button is pressed. 2. Cause Without using MELANS 1) Outdoor unit address is set to "00"...

  • Page 253: 88" Appears On The Lcd

    [8-2 ME remote Controller Problems ] 8-2-4 "88" Appears on the LCD. 1. Phenomena "88" appears on the remote controller when the address is registered or confirmed. 2. Cause, check method and remedy Cause Check method and remedy An error occurs when the address is registered or con- firmed.

  • Page 254: Refrigerant Control Problems

    [8-3 Refrigerant Control Problems ] Refrigerant Control Problems 8-3-1 Units in the Cooling Mode Do Not Operate at Expected Capacity. 1. Phenomena Although cooling operation starts with the normal remote controller display, the capacity is not enough 2. Cause, check method and remedy Cause Check method and remedy Compressor frequency does not rise sufficiently.
  • Page 255 [8-3 Refrigerant Control Problems ] Cause Check method and remedy RPM error of the outdoor unit FAN Refer to the following page(s). [8-7 Troubleshooting Outdoor Unit Fan Prob- Motor failure or board failure, or airflow rate de- lems](page 257) crease due to clogging of the heat exchanger The fan is not properly controlled as the outdoor [7-3-3 Error Code [1302] (during operation)](page temperature cannot be precisely detected by the...

  • Page 256: Units In The Heating Mode Do Not Operate At Expected Capacity

    [8-3 Refrigerant Control Problems ] 8-3-2 Units in the Heating Mode Do Not Operate at Expected Capacity. 1. Phenomena Although heating operation starts with the normal remote controller display, the capacity is not enough. 2. Cause, check method and remedy Cause Check method and remedy Compressor frequency does not rise sufficiently.
  • Page 257 [8-3 Refrigerant Control Problems ] Cause Check method and remedy Indoor unit LEV malfunction Refer to the following page(s).[8-8 Troubleshooting Insufficient refrigerant flows due to LEV malfunction LEV Problems](page 258) (not enough opening). Temperature reading error on the indoor unit piping Check the thermistor.

  • Page 258: Outdoor Units Stop At Irregular Times

    [8-3 Refrigerant Control Problems ] 8-3-3 Outdoor Units Stop at Irregular Times. 1. Phenomena Outdoor unit stops at times during operation. 2. Cause, check method and remedy Cause Check method and remedy The first stop is not considered as an error, as the Check the mode operated in the past by displaying unit turns to anti-restart mode for 3 minutes as a pre- preliminary error history on LED display with SW4.

  • Page 259: Checking Transmission Waveform And For Electrical Noise Interference

    [8-4 Checking Transmission Waveform and for Electrical Noise Interference ] Checking Transmission Waveform and for Electrical Noise Interference 8-4-1 M-NET Control is performed by exchanging signals between the outdoor unit and the indoor unit (ME remote controller) through M- NET transmission. Noise interference on the transmission line will interrupt the normal transmission, leading to erroneous op- eration.
  • Page 260 [8-4 Checking Transmission Waveform and for Electrical Noise Interference ] (3) Check method and remedy 1) Measures against noise Check the followings when noise exists on the wave or the errors described in (1) occur. Error code definition Remedy Check that the wiring 1.

  • Page 261: Ma Remote Controller

    [8-4 Checking Transmission Waveform and for Electrical Noise Interference ] 8-4-2 MA Remote Controller The communication between the MA remote controller and the indoor unit is performed with current tone burst. (1) Symptoms caused by noise interference on the transmission line If noise is generated on the transmission line, and the communication between the MA remote controller and the indoor unit is interrupted for 3 minutes in a row, MA transmission error (6831) will occur.

  • Page 262: Pressure Sensor Circuit Configuration And Troubleshooting Pressure Sensor Problems

    [8-5 Pressure Sensor Circuit Configuration and Troubleshooting Pressure Sensor Problems ] Pressure Sensor Circuit Configuration and Troubleshooting Pressure Sensor Problems 8-5-1 Comparing the High-Pressure Sensor Measurement and Gauge Pressure By configuring the digital display setting switch (SW4 (when SW6-10 is set to OFF)) as shown in the figure below, the pressure as measured by the high-pressure sensor appears on the LED1 on the control board.

  • Page 263: Comparing The Low-Pressure Sensor Measurement And Gauge Pressure

    [8-5 Pressure Sensor Circuit Configuration and Troubleshooting Pressure Sensor Problems ] 8-5-3 Comparing the Low-Pressure Sensor Measurement and Gauge Pressure By configuring the digital display setting switch (SW4 (when SW6-10 is set to OFF)) as shown in the figure below, the pressure as measured by the low-pressure sensor appears on the LED1 on the control board.

  • Page 264: Troubleshooting Solenoid Valve Problems

    [8-6 Troubleshooting Solenoid Valve Problems ] Troubleshooting Solenoid Valve Problems Check whether the output signal from the control board and the operation of the solenoid valve match. Setting the self-diagnosis switch (SW4) as shown in the figure below causes the ON signal of each relay to be output to the LED's. Each LED shows whether the relays for the following parts are ON or OFF.
  • Page 265 [8-6 Troubleshooting Solenoid Valve Problems ] (3) In case of SV1a (Bypass valve) This solenoid valve opens when powered (Relay ON). 1) At compressor start-up, the SV1a turns on for 4 minutes, and the operation can be checked by the self-diagnosis LED display and the closing sound.

  • Page 266: Troubleshooting Outdoor Unit Fan Problems

    [8-7 Troubleshooting Outdoor Unit Fan Problems ] Troubleshooting Outdoor Unit Fan Problems (1) Fan motor (common items) To check the revolution of the fan, check the inverter output state on the self-diagnosis LED, as the inverter on the outdoor fan controls the revolutions of the fan. When starting the fan, the fan runs at full speed for 5 seconds.

  • Page 267: Troubleshooting Lev Problems

    [8-8 Troubleshooting LEV Problems ] Troubleshooting LEV Problems 8-8-1 General Overview on LEV Operation LEV (Indoor unit: Linear expansion valve) and LEV2 (Outdoor unit: Linear expansion valve) are stepping-motor-driven valves that operate by receiving the pulse signals from the indoor and outdoor unit control boards. (1) Indoor LEV and Outdoor LEV (LEV2) The valve opening changes according to the number of pulses.
  • Page 268 [8-8 Troubleshooting LEV Problems ] 3) Pulse signal output and valve operation Output pulses change in the following orders when the Output Output state Valve is closed; 1 (phase) number Valve is open; *1. When the LEV opening angle does not change, all the output phases will be off.
  • Page 269 [8-8 Troubleshooting LEV Problems ] (2) Outdoor LEV (LEV1) The valve opening changes according to the number of pulses. 1) Connections between the outdoor control board and LEV1 (outdoor expansion valve) Outdoor control board DC 12V Brown Drive circuit Blue Orange Yellow White...

  • Page 270: Possible Problems And Solutions

    [8-8 Troubleshooting LEV Problems ] 8-8-2 Possible Problems and Solutions The specifications of the outdoor unit (outdoor LEV) and the indoor unit (indoor LEV) differ.Therefore, remedies for each failure may vary. Check the remedy specified for the appropriate LEV as indicated in the right column. Malfunction Judgment method Remedy...

  • Page 271: Coil Removal Instructions

    [8-8 Troubleshooting LEV Problems ] 8-8-3 Coil Removal Instructions (1) Outdoor unit LEV (LEV1) 1) LEV component As shown in the figure, the outdoor LEV is made in such a way that the coils and the body can be separated. Body Coils Stopper...
  • Page 272 [8-8 Troubleshooting LEV Problems ] (2) Outdoor unit LEV (LEV2a, LEV2b) 1) Components The outdoor unit LEV consists of a coil and a valve body that can be separated from each other. Body Stopper Coil Lead wire 2) Removing the coil Securely hold the LEV at the bottom (as indicated by A in the figure), and turn the coil.

  • Page 273: Troubleshooting Inverter Problems

    [8-9 Troubleshooting Inverter Problems ] Troubleshooting Inverter Problems 8-9-1 Inverter-Related Problems and Solutions Replace only the compressor if only the compressor is found to be defective. (Overcurrent will flow through the inverter if the compressor is damaged, however, the power supply is automatically cut when overcurrent is detected, protecting the inverter from damage.
  • Page 274 [8-9 Troubleshooting Inverter Problems ] Error display/failure condition Measure/inspection item Inverter related errors Implement solutions that correspond to the error codes or preliminary 4250, 4255, 4256, 4220, 4225, 4226, 4230, 4240, 4260, 5301, error codes.[7-1 Error Code and Preliminary Error Code Lists](page 5305, 5306, 0403 165) Main power breaker trip...

  • Page 275: Checking The Inverter Board Error Detection Circuit

    [8-9 Troubleshooting Inverter Problems ] 8-9-2 Checking the Inverter Board Error Detection Circuit Items to be checked Phenomena Remedy Remove power supply. Overcurrent error Replace the INV board. Error code: 4250 Detail code: No. 101, 104, 105, 106, and Disconnect the inverter Logic error Replace the INV board.

  • Page 276: Checking The Inverter For Damage During Compressor Operation

    [8-9 Troubleshooting Inverter Problems ] 8-9-5 Checking the Inverter for Damage during Compressor Operation Items to be checked Phenomena Remedy Put the outdoor unit into opera- Overcurrent-related problems occur im- Check items 8-9-2 through 8-9-4 tion. mediately after compressor startup. for problems.
  • Page 277 [8-9 Troubleshooting Inverter Problems ] Items to be checked Phenomena Remedy <INV30YC> A BUS circuit error occurs immediately Check that 12 VDC is supplied to after compressor startup. the relay at startup (Check that Error code : 4220 LED5 lights up.)Between pins 1 (+) Detail code : 124 and 2 (-) on the CNRY connector Replace the inverter board if no...

  • Page 278: Checking The Converter For Damage During Compressor Operation

    [8-9 Troubleshooting Inverter Problems ] 8-9-6 Checking the Converter for Damage during Compressor Operation Items to be checked Phenomena Remedy Operate the outdoor unit. BUS voltage does not boost (does Replace the inverter board. not change)BUS voltage does not boost to approximately between 650 and 750 VDC, or the following errors are detected.

  • Page 279: Checking The Fan Inverter For Damage At No Load

    [8-9 Troubleshooting Inverter Problems ] 8-9-9 Checking the Fan Inverter for Damage at No Load Items to be checked Phenomena Remedy Turn off breaker. Within 30 seconds from the start of Change fan board. *Turn power off without fail. operation, an error other than a posi- tion error (5305, 5306) (detail code 132) is detected.

  • Page 280: Checking The Fan Inverter For Damage With Load

    [8-9 Troubleshooting Inverter Problems ] 8-9-10 Checking the Fan Inverter for Damage with Load Items to be checked Phenomena Remedy Turn off breaker. After operation, electrical overload error Check for fan motor lock. →If locked, change for fan motor. or position detection error and unit stops within 10 seconds.

  • Page 281: Solutions For The Main No-Fuse Breaker Trip

    [8-9 Troubleshooting Inverter Problems ] 8-9-12 Solutions for the Main No-Fuse Breaker Trip Items to be checked Phenomena Remedy Check the breaker capacity. Use of a non-specified break- Replace it with a specified breaker. Perform Meg check between the Zero to several ohm, or Meg Check each part and wiring.

  • Page 282: Simple Check On Inverter Circuit Components

    [8-9 Troubleshooting Inverter Problems ] 8-9-14 Simple Check on Inverter Circuit Components Turn off the power of the unit and wait at least 10 minutes, check that the voltage between the FT-P and FT-N terminals on the INV board or between the SC-P and SC-N terminals is 20 VDC or less, and then remove the applicable parts from the control box.
  • Page 283 [8-9 Troubleshooting Inverter Problems ] <INV20Y> Judgment value (reference) Black ( + ) SC-P1 FT-N SC-L1 SC-L2 SC-L3 5 - 200 Ω 5 - 200 Ω 5 - 200 Ω SC-P1 ∞ ∞ ∞ FT-N ∞ 5 - 200 Ω Red (-) SC-L1 ∞...
  • Page 284 [8-9 Troubleshooting Inverter Problems ] <INV30YC> Judgment value (reference) Black ( + ) SC-L1 SC-L2 SC-L3 SC-B SC-L FT-R21 SC-N ∞ 5 - 200 Ω SC-L1 ∞ 5 - 200 Ω SC-L2 ∞ 5 - 200 Ω SC-L3 ∞ Red (-) SC-B 5 - 200 Ω...

  • Page 285: 8-10 Control Circuit

    [8-10 Control Circuit ] 8-10 Control Circuit 8-10-1 Control Power Supply Function Block 1) PUHY-P200 - P400YKB-A1 Power source system (380 ~ 415 VAC) Control system (5 ~ 30 VDC) INV board Noise filter Compressor Noise filter Rectifier Smoothing capacitor...

  • Page 286: Indoor Unit

    [8-10 Control Circuit ] 2) PUHY-P450 - P500YKB-A1 Power source system (380 ~ 415 VAC) Control system (5 ~ 30 VDC) Detection circuit for the power Rectifier supply to the transmission line Smoothing capacitor Compressor Noise filter Noise filter Rectifier Inverter AC Power Source Fuse...

  • Page 287: Troubleshooting Problems With Outdoor Unit Transmission Power Supply Circuit

    [8-10 Control Circuit ] 8-10-2 Troubleshooting Problems with Outdoor Unit Transmission Power Supply Circuit 1) PUHY-P200 - P400YKB-A1 Check the voltage at the indoor/outdoor transmission terminal block (TB3) of outdoor unit. 24 ~ 30 VDC Check whether the transmission line is disconnected, check for contact failure, and repair the problem.
  • Page 288 [8-10 Control Circuit ] 2) PUHY-P450 - P500YKB-A1 Check the voltage at the indoor/outdoor transmission terminal block (TB3) of outdoor unit. Check whether the transmission line is disconnected, 24 ~ 30 VDC check for contact failure, and repair the problem. Check the voltage at TB3 after removing transmission line from TB3.
  • Page 289 [8-10 Control Circuit ] Replace the M-NET board 198 ~ 264 VAC Replace the noise filter. Check the voltage between L3 and N at the power supply terminal block TB1. 198 ~ 264 VAC Replace the noise filter. Check and fix any power supply wiring and main power supply problems found.

  • Page 290: 8-11 Measures For Refrigerant Leakage

    [8-11 Measures for Refrigerant Leakage ] 8-11 Measures for Refrigerant Leakage 1. Leak spot: In the case of extension pipe for indoor unit or optional unit (Cooling season) 1) Mount a pressure gauge on the service check joint (CJ2) on the low-pressure side. 2) Stop all the indoor units, and close the liquid service valve (BV2) inside the outdoor unit while the compressor is stopped.
  • Page 291 [8-11 Measures for Refrigerant Leakage ] When the power to the outdoor/indoor unit must be turned off to repair the leak after closing the service valves specified in the item 4, turn the power off in approximately one hour after the outdoor/indoor units stop. 1) When 30 minutes have passed after the item 4 above, the indoor unit lev turns from fully closed to slightly open to prevent the refrigerant seal.

  • Page 292: 8-12 Compressor Replacement Instructions

    [8-12 Compressor Replacement Instructions ] 8-12 Compressor Replacement Instructions Follow the procedures below (Steps 1 through 6) to remove the compressor components and replace the compressor. Reassemble them in the reverse order after replacing the compressor. 1. Remove both the top and bottom service panels 2.
  • Page 293 [8-12 Compressor Replacement Instructions ] Compressor cover Compressor cover (right) (top) 4. Remove the compressor cover (top). 5. Remove the compressor wires, compressor cover, and the right. Protection for the sealing material Suction piping Protection for the compressor cover 6. Place protective materials on the insulation lining of the compressor cover and on the sealing material on the compressor suction pipe to protect them from the torch flame, debraze the pipe, and replace the...

  • Page 294: Troubleshooting Problems Using The Led Status Indicators On The Outdoor Unit

    [8-13 Troubleshooting Problems Using the LED Status Indicators on the Outdoor Unit ] 8-13 Troubleshooting Problems Using the LED Status Indicators on the Outdoor Unit If the LED error display appear as follows while all the SW4 switches and SW6-10 are set to OFF, check the items under the ap- plicable item numbers below.
  • Page 295 [8-13 Troubleshooting Problems Using the LED Status Indicators on the Outdoor Unit ] - 286 - HWE14040...

  • Page 296: Chapter 9 Led Status Indicators On The Outdoor Unit Circuit Board

    Chapter 9 LED Status Indicators on the Outdoor Unit Circuit Board LED Status Indicators........................289 9-1-1 How to Read the LED ......................... 289 9-1-2 Initial LED Display..........................290 9-1-3 Clock Memory Function ........................291 LED Status Indicators Table ......................292 - 287 - HWE14040...
  • Page 297 - 288 - HWE14040...

  • Page 298: Led Status Indicators

    [9-1 LED Status Indicators ] LED Status Indicators 9 LED Status Indicators on the Outdoor Unit Circuit Board 9-1-1 How to Read the LED By setting the DIP SW 4-1 through 4-10 (Set SW6-10 to OFF.)(Switch number 10 is represented by 0), the operating condition of the unit can be monitored on the service monitor.

  • Page 299: Initial Led Display

    [9-1 LED Status Indicators ] 9-1-2 Initial LED Display From power on until the completion of initial settings, the following information will be displayed on the monitor screen. (Displays No. 1 through No. 4 in order repeatedly.) Item Display Remarks Software version [0103] : Version 1.03 Refrigerant type...

  • Page 300: Clock Memory Function

    [9-1 LED Status Indicators ] 9-1-3 Clock Memory Function The outdoor unit has a simple clock function that enables the unit to calculate the current time with an internal timer by receiv- ing the time set by the system controller, such as AG-150A. If an error (including a preliminary error) occurs, the error history data and the error detection time are stored into the service memory.

  • Page 301: Led Status Indicators Table

    [9-2 LED Status Indicators Table] - 292 - HWE14040...
  • Page 302 [9-2 LED Status Indicators Table] - 293 - HWE14040...
  • Page 303 [9-2 LED Status Indicators Table] - 294 - HWE14040...
  • Page 304 [9-2 LED Status Indicators Table] - 295 - HWE14040...
  • Page 305 [9-2 LED Status Indicators Table] - 296 - HWE14040...
  • Page 306 [9-2 LED Status Indicators Table] - 297 - HWE14040...
  • Page 307 [9-2 LED Status Indicators Table] - 298 - HWE14040...
  • Page 308 [9-2 LED Status Indicators Table] - 299 - HWE14040...
  • Page 309 [9-2 LED Status Indicators Table] - 300 - HWE14040...
  • Page 310 [9-2 LED Status Indicators Table] - 301 - HWE14040...
  • Page 311 [9-2 LED Status Indicators Table] - 302 - HWE14040...
  • Page 312 [9-2 LED Status Indicators Table] - 303 - HWE14040...
  • Page 313 [9-2 LED Status Indicators Table] - 304 - HWE14040...
  • Page 314 [9-2 LED Status Indicators Table] - 305 - HWE14040...
  • Page 315 [9-2 LED Status Indicators Table] - 306 - HWE14040...
  • Page 316 [9-2 LED Status Indicators Table] - 307 - HWE14040...
  • Page 317 [9-2 LED Status Indicators Table] - 308 - HWE14040...
  • Page 318 [9-2 LED Status Indicators Table] - 309 - HWE14040...
  • Page 319 [9-2 LED Status Indicators Table] - 310 - HWE14040...
  • Page 320 [9-2 LED Status Indicators Table] - 311 - HWE14040...
  • Page 321 [9-2 LED Status Indicators Table] - 312 - HWE14040...
  • Page 322 [9-2 LED Status Indicators Table] - 313 - HWE14040...
  • Page 323 [9-2 LED Status Indicators Table] - 314 - HWE14040...
  • Page 324 [9-2 LED Status Indicators Table] - 315 - HWE14040...
  • Page 325 [9-2 LED Status Indicators Table] - 316 - HWE14040...
  • Page 326 [9-2 LED Status Indicators Table] - 317 - HWE14040...
  • Page 327 [9-2 LED Status Indicators Table] - 318 - HWE14040...
  • Page 328 [9-2 LED Status Indicators Table] - 319 - HWE14040...
  • Page 329 [9-2 LED Status Indicators Table] - 320 - HWE14040...
  • Page 330 [9-2 LED Status Indicators Table] - 321 - HWE14040...
  • Page 331 [9-2 LED Status Indicators Table] - 322 - HWE14040...
  • Page 332 [9-2 LED Status Indicators Table] - 323 - HWE14040...
  • Page 333 [9-2 LED Status Indicators Table] - 324 - HWE14040...

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