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Trouble shooting 19
OUTDOOR UNIT Error Method:
Heat Sink Temperature Sensor 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
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
CN21
If the voltage does not appear, replace Main PCB.
Indicate or Display:
Indoor Unit
Outdoor Unit : LED 8 times blink
ERROR CODE : No indication
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
16.1
12.4
60°C
70°C
80°C
1.25
0.89
1 2
1 2
1 2
CN22
CN23
CN26
: No LED
15°C
20°C
9.73
7.67
6.10
90°C
100°C
0.65
0.48
0.36
1 2
CN25
07-22
30°C
40°C
50°C
3.95
2.62
1.79
110°C
120°C
0.27
0.21
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Troubleshooting
