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Trouble shooting 10
OUTDOOR UNIT Error Method:
Heat Sink Thermistor (INV) Error
Detective Actuators:
Outdoor Unit Inverter PCB
Heat Sink Temperature Thermistor (INV)
Forecast of Cause :
1. Connector connection failure
Check Point 1 : Check connection of connector
Check if connector is removed.
Check if connector is 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
Thermistor characteristics (Approx. value)
Temperature
(°C )
Resistance value (k )
Temperature
(°C )
Resistance value (k )
If Thermistor is either open or shorted, replace it and reset the power.
OK
OK
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)
THERMISTOR
( HEATSINK INV. TEMP. )
BLACK
1
1
CN803
BLACK
2
2
If the voltage does not appear, replace Inverter PCB.
Indicate or Display:
Refer to error code table.
Detective details:
When Heat Sink Temperature Thermistor (INV) open or
short-circuit is detected at power ON or while running the compressor.
2. Thermistor failure
0
5
10
15
15.8
12.2
9.5
7.5
60
70
80
90
1.17
0.83
0.6
0.44
02-13
3. Inverter PCB failure
20
30
40
50
5.9
3.78
2.50
1.69
100
110
120
0.33
0.25
0.19
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