Trouble shooting 15
OUTDOOR UNIT Error Method:
Heat Sink Temperature
Thermistor Error
Detective Actuators:
Outdoor Unit Inverter PCB Circuit
Heat Sink Temperature Thermistor
Forecast of Cause :
1. Connector connection 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.
OK
OK
Check Point 2 : Remove connector and check Thermistor resistance value
Check Point 2 :
Thermistor Characteristics (Approx. value)
Temperature
Resistance Value (k )
Temperature
Resistance Value (k )
If Thermistor is either open or shorted, replace it and reset the power.
OK
OK
Check Point 3 :
Check Point 3 : Check voltage of Inverter PCB (DC5.0V)
Make sure circuit diagram of outdoor unit and check terminal voltage at Thermistor (DC5.0V)
If the voltage does not appear, replace Inverter PCB.
Indicate or Display:
Refer to error code table.
Detective details:
When Heat Sink Temperature Thermistor open or short-circuit is
detected at power ON or while running the compressor.
2.Thermistor failure
0°C
5°C
10°C
15.8
12.2
9.5
60°C
70°C
80°C
1.17
0.83
0.60
02-18
3. Inverter PCB failure
15°C
20°C
30°C
7.5
5.9
3.78
90°C
100°C
0.44
0.33
40°C
50°C
2.50
1.69