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2-22-3. Checking indoor unit addresses
Use the remote controller to check the addresses of the
indoor units. Press and hold the
button for 4 seconds or longer (simple settings mode,
"ALL" appears on the remote controller). Then press the
button and select the indoor address.
(For the system addresses of the No. 1 outdoor unit,
each time the button is pressed, the address changes
as follows: 1-1, 1-2, ...)
The indoor unit fan operates only at the selected indoor
unit.
Confirm the indoor unit address. (For the system
addresses of the No. 2 outdoor unit, the displayed
addresses are 2-1, 2-2, ...)
Press the
button again to return to the normal
remote controller mode.
2-22-4. Indicating (marking) the indoor and outdoor
unit combination number
Indicate (mark) the number after automatic address
setting is completed.
(1) So that the combination of each indoor unit can be
easily checked when multiple units are installed,
ensure that the indoor and outdoor unit numbers
correspond to the system address number on the
outdoor unit control PCB, and use a magic marker
or similar means which cannot be easily removed
to indicate the numbers in an easily visible location
on the indoor units (near the indoor unit nameplates).
Example: (Outdoor) 1 – (Indoor) 1, 2...
(Outdoor) 2 – (Indoor) 1, 2...
(2) These numbers will be needed for maintenance.
Be sure to indicate them.
K Type (for Link Wiring)
2-23. Caution
This unit may be used in a single-type refrigerant
system where 1 outdoor unit is connected to 1
indoor unit, and also in a system where 1 outdoor
unit is connected to multiple indoor units (maxi-
mum 4).
If link wiring is used, set the outdoor unit system add-
ress to allow the combination of indoor and outdoor
units to be identified. At the same time, indicate the
indoor-outdoor unit combination number in a location
where it can be checked easily (near the indoor unit
nameplates). (This number will be required for
subsequent maintenance. Refer to 2-26-3, -4.)
Request that the customer be present when the test
run is performed. At this time, explain the operation
manual and have the customer perform the actual
steps.
Be sure to pass the manuals and warranty certificate
to the customer.
button and
2 HP
Fig. 2-20
3 HP
8 – 10 HP
FUSE (0.5A, F500)
RC P
(CN039, RED)
FUSE
(6.3A, F101)
CTL2
(CN202, GRN)
CTL1
(CN203, GRN)
2-21
Check that the 220 – 240 V AC wiring is not connected
to the inter-unit control wiring connector terminal.
If 220 – 240 V AC is accidentally applied, the indoor or
outdoor unit control PCB fuse (0.5 A for both indoor
and outdoor units) will blow in order to protect the PCB.
Correct the wiring connections, then disconnect the 2P
connectors (indoor: blue, OC) (outdoor: blue, serial 1)
that are connected to the PCB, and replace them with
2P connectors (indoor: brown, EMG) (outdoor: brown,
serial 2).
If operation is still not possible after changing the brown
connectors, try cutting the varistor (black) (both indoor
and outdoor).
(Be sure to turn the power OFF before performing this
work.)
Indoor unit control PCB
2P connector (brown)
2P connector (blue)
CHK (2P plug)
Ourdoor unit control PCB
OC (CN500, BLU)
63PH (CN027, WHT)
EXCT
(CN030, RED)
IC002
N.P.CHECK
LED2
(CN046, RED)
LED1
R.C.ADD. Rotary switch
MODE (CN038)
Varistor (black)
VA002
Fuse (0.5A)
CHK (2P plug)
ON
SW103
OFF
TEST
Fuse (0.5A)
2P connector (blue)
2P connector (brown)
TEST
OFF
SW103
ON
Varistor (black)
VA002
EMG (CN502, BRN)
SILENT (CN037, WHT)
PUMP DOWN (CN048)
TEMINAL (CN205, BLK)
C2 (CN020, WHT)
C1 (CN021, WHT)
TS (CN022, RED)
TO (CN023, BLK)
TD (CN024, BLK)
MOV1
(CN300, WHT)
MOV2
(CN301, BLK)
LED (D041)
EEPROM
TEST (CN033, RED)
C-CHK (CN035)
A.ADD (CN047)
R.C.ADD. DIP switch
IC001
D115
Fig. 2-21
2
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