Trouble shooting 27
OUTDOOR UNIT Error Method:
Indicate or Display:
ERROR CODE : E : 2c
Detective Actuators:
Detective details:
Forecast of Cause :
OK
OK
OK
OK
4-way valve error
Outdoor Unit Main PCB Circuit
Heat Exchanger Temperature
Thermistor (Outlet)
Outdoor Temperature Thermistor
4-way valve
When the outdoor heat exchanger temperature is compared with
the outdoor 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. Main 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 CN30 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.
02-29
Outdoor Unit : No indication
Cooling or Dry operation
[Outdoor heat exchanger temp.] - [Outdoor temp.] < -10degC
Heating operation
[Outdoor heat exchanger temp.] - [Outdoor temp.] > +10degC
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 ]
OK
OK
Check Point 4 : Replace Main PCB
If Check Point 1- 3 do not improve the symptom, replace Main PCB.
Check Point 2 : Check Heat exchanger temp. thermistor and Outdoor temp. thermistor
Isn’t it fallen off the holder?
Is there a cable pinched?
>> Check characteristics of thermistor (Refer to Trouble shooting 5, 7),
If defective, replace the thermistor
