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For AO*30LMAW4
Trouble shooting 12
OUTDOOR UNIT Error Method:
Compressor Temperature
Thermistor Error
Detective Actuators:
Outdoor Unit Main PCB Circuit
Compressor 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 (Rough 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 Main PCB (DC5.0V)
Make sure circuit diagram of outdoor unit and check terminal voltage at Thermistor (DC5.0V)
1 2
CN25
CN26
If the voltage does not appear, replace Main PCB.
Indicate or Display:
Refer to error code table.
Detective details:
When Compressor 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
70°C
80°C
90°C
8.69
6.27
4.60
1 2
1 2
1 2
CN23
CN22
15°C
20°C
30°C
40°C
79.1
62.5
40.0
26.3
100°C
120°C
140°C
160°C
3.43
2.00
1.22
0.79
1 2
CN21
02-22
50°C
60°C
12.3
17.8
180°C
0.52
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Troubleshooting
