8.2 Electric funtions of outdoor
8.2.1 Control of the compressor, outdoor motor and 4-way valve
8.2.1.1 Outdoor fan motor control
A. When system do not have overheating or over current protection, outdoor fan speed
will vary with outdoor ambient temperature, as follows:
a. in cooling mode
temperature arise
super low speed
low speed
med speed
high speed
super low speed
low speed
med speed
high speed
15℃
24℃
28℃
13℃
22℃
26℃
temperature reduce
outdoor fan motor
b. in heating mode (heat pump unit)
temperature arise
super low speed
low speed
med speed
high speed
11℃
19℃
9℃
16℃
temperature reduce
outdoor fan motor
super low speed
low speed
med speed
high speed
22℃
23℃
B.When fan speed changes, if it is from Low speed to High speed, there is no time delay;
if it is from High speed to Low speed, there is 45-second delay.
C.In cooling mode, in one minute before the compressor begins to run,the outdoor motor
will be switched on to run.
D.Super low speed control:outdoor motor will be off for 1 minute at the interval of 45
seconds.
8.2.1.2 Compressor control
After receiving the “compressor ON” signal sent from indoor unit, the compressor will run.
Its running-stop interval is 3 minutes. Being powered on firstly is without 3-minute delay.
If the two systems receive the “compressor ON” signal simultaneously,they will start up in
turn, and the interval is 20 seconds.
8.2.1.3 4-way valve control
A. In cooling or dehumidification mode, 4-way valve is not electrified.
B. When receiving the “heating” and “compressor ON” signal from indoor unit, 4-way
valve and compressor will start up simultaneously.
C. In 3 minutes after heating is over, it will be shut off 2 minutes and 50 seconds later. In
3-minute standby period, at 2-minute and 50-second clock, it is electrified.
D. Changing from cooling mode to heating mode, 3 minutes later, it is eletrified.
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