7. Troubleshooting
LED status
Operation indicator, time indicator, Defrosting (fan
indicator, for cooling only type)indicator flicker at 5Hz
Four times Current protection (PRCUR1) 5Hz
Time indicator flickers at 5Hz the room temperature sensor o is open or short
Operation indicator flickers at 5Hz the evaporator temperature sensor is open or short
Defrosting indicator flickers at 5Hz the condenser temperature sensor is open or short
Operation indicator, time indicator, indicator flicker at
5Hz
EEPROM error
Defrosting indicator, auto indicator flicker at 5Hz Outdoor unit protects
8. Electronic Control Principle of Large Cooling Capacity Split Model A/C
8.1 Fan only mode
Fan speed is high/mid/low/ Auto
8.2 Cooling mode
The 4-way valve is closed at cooling mode.
The action of the compressor and the outdoor fan:
Condition Compressor Outdoor fan
T> Ts+1 On On Temp. up
T<Ts+1 Off Off
T> Ts On On Temp. down
T<Ts Off Off
Auto fan
Condition
T=Indoor Temp.-Setting Temp.
Indoor fan speed
T<4℃ Low
4<T<5℃℃ Med.
Temp. up
T>5℃ High
T> 3℃ High
1<T<3℃℃ Med.
Temp. down
T<1℃ Low
Anti-freezing control to indoor evaporator
Condition
Temp. Time
Compressor Outdoor fan
T> TE6 On On Temp. up
T< TE6 >4 Minutes Off Off
T> TE5 On On Temp. down
T< TE5 Off Off
Condenser high temp. protection( only for heat pump)
Temp. Condition Compressor
T> TE10 Off Temp. up
T< TE10 On
T> TE11 Off Temp. down
T< TE11 On
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