Forecast of Cause :
OKOK
OKOK
When the indoor heat exchanger temperature is compared with
the room temperature, and either following condition is detected
continuously two times, the compressor stops.
1. Connector connection failure 2. Thermistor failure 3. Coil failure 4. 4-way valve failure
5. Inverter PCB failure
Check Point 1 : Check connection of Connector
Check if connector is removed.
Check erroneous connection.
Check if thermistor cable is open.
>>Upon correcting the removed connector or mis-wiring, reset the power.
Check Point 3 : Check the solenoid coil and 4-way valve
Remove CN501(AO*R09LKC)/CN30(AO*R12LKC) from PCB and check the resistance
value of coil.Resistance value is about 1.4k
>>If it is Open or abnormal resistance value, replace Solenoid Coil.
02-20
Cooling or Dry operation
[Indoor heat exchanger temp.] - [Room temp.] > 10degC
Heating operation
[indoor heat exchanger temp.] - [room temp.] < -10degC
If the same operation is repeated 5 times,
the compressor stops permanently.
[ Solenoid coil ]
Check each piping temperature,
and the location of the valve by the temperature difference.
>>If the value location is not proper, replace 4-way valve.
[ 4-way valve ]
OKOK
Check Point 4 : Replace Inverter PCB
If Check Point 1- 3 do not improve the symptom, replace Inverter PCB.
Check Point 2 : Check each thermistor
Isn’t it fallen off the holder?
Is there a cable pinched?
>> Check characteristics of thermistor,
If defective, replace the thermistor
Trouble shooting 18
OUTDOOR UNIT Error Method:
Detective Actuators: Detective details:
Indicate or Display:
4-way valve error
Outdoor Unit Inverter PCB Circuit
4-way valve
Refer to error code table.
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