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ii. Auto Fan Speed
[Cooling, Dry]
According to room temperature and setting temperature, indoor fan speed is determined automatically.
When set temperature is not achieved, the indoor fan will operate according to pattern below.
Fan
Speed
Higher
Medium
Lower
When set temperature achieved, the indoor fan speed will be fixed. When thermostat off, the fan stop periodically.
[Heating]
According to indoor pipe temperature, automatic heating fan speed is determined as follows.
B. Feedback control
Immediately after the fan motor started, feedback control is performed once every second.
During fan motor on, if fan motor feedback ≥ 2550 rpm or < 50 rpm continue for 10 seconds, then fan motor error
counter increase, fan motor is then stop and restart. If the fan motor counter becomes 7 times, then H19 - fan
motor error is detected. Operation stops and cannot on back.
13.3 Outdoor Fan Motor Operation
It starts when compressor starts operation and it stops 30 seconds after compressor stops operation.
During cooling operation, and outdoor ambient temperature is below 46.4°F (8°C), outdoor fan speed will be
controlled according to outdoor piping temperature as following:
a
b
c
o
o
102.2
F (39
C)
o
o
66.2
F (19
C)
Indoor Pipe Temp.
ON
Compressor:
Fan Speed
ON
Outdoor Fan:
30 sec
OD Pipe Temp.
speed increased
B
A
d
e
f
RPM Increased
RPM Maintain
RPM Reduced
OFF
OFF
OFF
Outdoor fan
B -5.4°F (B -3°C)
Outdoor fan
speed maintain
A -5.4°F (A -3°C)
Outdoor fan
speed reduce
67
[1 pattern : 10 s]
g
h
a
b
o
o
95
F (35
C)
o
o
60.8
F (16
C)
ON
ON
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