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Trouble shooting 19
OUTDOOR UNIT Error Method:
Heat Sink Temperature
Thermistor Error
Detective Actuators:
Outdoor Unit Main PCB Circuit
Heat Sink Temperature Thermistor
Forecast of Cause :
1. Connector connection failure 2.Thermistor failure 3. 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.
OK
OK
Check Point 2 : Remove connector and check Thermistor resistance value
Check Point 2 :
Thermistor Characteristics (Approx. value)
Temperature
AO*18L/ 24L
Resistance
Value (k )
AO*30L
Temperature
Resistance
AO*18L/ 24L
Value (k )
AO*30L
If Thermistor is either open or shorted, replace it and reset the power.
OK
OK
Check Point 3 :
Check Point 3 : Check voltage of Main PCB (DC5.0V)
Make sure circuit diagram of outdoor unit and check terminal voltage at Thermistor (DC5.0V)
1 2
CN25
If the voltage does not appear, replace Main 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.
0°C
5°C
10°C
169
130
101
16.1
12.4
9.73
60°C
70°C
80°C
12.3
8.69
6.27
1.25
0.89
0.65
1 2
1 2
1 2
CN23
CN22
CN21
02-29
15°C
20°C
30°C
79.1
62.5
40.0
7.67
6.10
3.95
90°C
100°C
120°C
4.60
3.43
2.00
0.48
0.36
0.21
40°C
50°C
26.3
17.8
2.62
1.79
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Troubleshooting
