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2-4 Outdoor Fan Speed Control
To optimize the performance of air conditioner, the outdoor fan speed is selected
automatically according to the outdoor temperature.
Note that in both Cooling and Heating modes, the fan comes on at first at
high speed (H mode) for 5 seconds. Since outdoor conditions sometimes
make it difficult for the fan to start, this sudden surge of power may be
necessary.
The outdoor fan operates in H mode for 3 minutes after the compressor stops
(excluding defrosting operation period).
Charts below show how the outdoor fan speed changes with the change in
outdoor temperature.
(A) Cooling
Outdoor unit coil
2
temperature [C2]
Not less than 25° c
Not more than 25° c
(B) Heating
Outdoor coil
temperature [C2]
Not less than 14° c
Not more than 14° c
Outdoor fan
motor (FMo)
H
M
Outdoor fan
motor (FMo)
M
H
– 30 –
2. Processes and functions
H
25
M
Fig. 6
M
14
H
Fig. 7
SM830033
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