Service manual
27
T<1.0℃ High Room temp. down
1.0℃<T<2.0℃ Med.
T>2.0℃ Low
11.6.6. 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
11.6.7. The current protection
Model Current Compressor
I>19.0 A Off Current up 18000btu/h
15.0.A<I<19.0A Decrease frequency of compressor
I< 12.5A On
I>18.5 A Off
14.5A<I<18.5A Decrease frequency of compressor
Current down 18000btu/h
I< 12.0A On
11.6.8. The temp. compensation
Jump setting in indoor PCB
J2 On On Off Off
J3 On Off On Off
0℃ -4℃ -2℃ 0℃
ΔT
11.7. Defrosting operation (Available for heating only).
11.7.1 Defrosting condition:
11.7.1.1. When outdoor temp. is more than 0℃,
Defrosting starts when meeting one of the following conditions,
a. The temperature of outdoor heat exchanger remains consecutively lower than 3°c for more
than 40 minutes, and the temperature remains consecutively -4°c for more than 3 minutes,
b. The temperature of outdoor heat exchanger remains consecutively lower than 3°c for more
than 80 minutes, and the temperature remains consecutively -2°c for more than 3 minutes
11.7.1.2. When outdoor temp. is less than 0℃,
Defrosting starts when meeting one of the following conditions,
a. The temperature of outdoor heat exchanger remains consecutively lower than 3°c for more
than 40 minutes, and the temperature remains consecutively -6°c for more than 3 minutes,
b. The temperature of outdoor heat exchanger remains consecutively lower than 3°c for more
than 40 minutes, and the temperature remains consecutively -6°c for more than 3 minutes,
c. The temperature of indoor unit pipe decreases 5°c than before
11.7.1.3. The temperature of outdoor heat exchanger remains consecutively lower than 3°c for more
than 120 minutes, and the temperature remains consecutively -2°c for more than 3 minutes
11.7.2 Ending condition of defrosting
If one of following conditions is satisfied, end the defrost 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 8°C and this continues for more than 80
seconds.
c. When the temperature of outdoor heat exchanger rises up to 12°C
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