OK
OK
1. Connector connection failure 2. Thermistor failure 3. Coil failure 4. 4-way valve failure
5. Main PCB failure
Test 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 miss-wiring, reset the power.
Test 3 : Check the solenoid coil and 4-way valve
[ Solenoid coil ]
Remove CN500 from PCB and check the resistance value of coil.
Resistance value is about 1355 at 68°F(20°C)
>> If it is Open or abnormal resistance value, replace Solenoid Coil.
[ 4-way valve ]
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.
OKOK
Test 4 : Replace Main PCB
If Test 1- 3 do not improve the symptom, replace Main PCB.
Test 2 : Check thermistor of Indoor unit
Isn’t it fallen off the holder?
Is there a cable pinched?
>> Check characteristics of thermistor, (Refer to Trouble shooting 6,7),
If defective, replace the thermistor.
Indoor Unit Controller PCB Circuit
Heat Exchanger Temperature Thermistor
Room Temperature Thermistor
4-way valve
When the indoor heat exchanger temperature is compared with
the room temperature, and either following condition is detected
continuously two times, the compressor stops.
Cooling or Dry operation
[Indoor heat exchanger temp.] - [Room temp.] > 40°F (20°C )
Heating operation
[indoor heat exchanger temp.] - [Room temp.] < -40°F (-20°C )
If the same operation is repeated 2 times,
the compressor stops permanently.
Trouble shooting 20
OUTDOOR UNIT Error Method:
4-Way Valve Error
02-22
Indicate or Display:
Outdoor Unit : No indication
Indoor Unit : Operation lamp: 9 times Flash, Timer lamp: 9 times Flash
Economy lamp: Continuous flash.
ERROR CODE : [E : 99]
Detective Actuators:
Detective details:
Forecast of Cause:
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