16
Indoor evaporator high-temperature protection at heating mode
Condition
T= Indoor exchanger temp.
Compressor
T<48℃ On
53℃<T<63℃ Decrease frequency of compressor
T>63℃ Off
8.2.4 Defrost operation
1. Defrosting condition:
The temperature of outdoor heat exchanger remains consecutively lower than -2°c for more
than 40 minutes,
2. Ending condition of defrosting
If one of following conditions is satisfied, end the defrosting and turn into heating mode:
a. The defrost time has reached to 10 minutes.
b. When the temperature of outdoor heat exchanger rises up to 15°C.
3. Defrosting Actions:
a. Compressor runs.
b. 4 way valve switches off,
c. Outdoor fan switches off
d. Indoor fan running according to anti-cold wind function in heating mode.
4. Automatic operation mode
The air conditioner automatically selects one of the following operation modes: cooling,
heating or fan only according to the temp. difference between room temp. (TA) and set
temp. (TS).
TA—TS Operation mode
TA—TS>2℃ Cooling
-1℃≤TA-TS≤+2℃ Fan-only
TA-TS<-1℃ Heating (air-only for cooling only type)
8.3 Mode conflict
The indoor units can not work cooling mode and heating at same time.
Heating mode has a priority.
8.3.1Definition
Cooling mode Heating Mode Fan Off
Cooling mode No Yes No No
Heating Mode Yes No Yes No
Fan No Yes No No
Off No No No No
No: No mode conflict;
Yes: Mode conflict
8.3.2 Unit action
• In case of one Indoor unit working in cooling mode or fan mode, and another indoor
unit is set to heating mode, the indoor unit working in cooling mode or fan mode will
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