II - 6
SM830082
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2
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Section
5
2. Processes and functions
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 Outdoor fan
temperature [C2] motor (FMo)
or more 77°F H
32°F or more, less than 77°F M
less than 32°F L
77
H
L
Fig. 6
OUTDOOR TEMPERATURE (°F)
57
M
H
Outdoor coil Outdoor fan
temperature [C2] motor (FMo)
or more 57°F M
less than 57°F H
(B) Heating
Fig. 7
OUTDOOR TEMPERATURE (°F)
32
M
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