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Trouble shooting 13
OUTDOOR UNIT Error Method:
Outdoor unit Heat Ex. sensor error
Detective Actuators:
Outdoor unit Main PCB
Heat exchanger 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 Main PCB (DC5.0V)
Make sure circuit diagram of outdoor unit and check terminal voltage at Thermistor (DC5.0V)
AO*G07/09/12/14LUC, 09LTC
THERMISTOR
(PIPE)
BLACK
BLACK
BLACK
BLACK
THERMISTOR
(DISCHARGE)
THERMISTOR
(OUTDOOR)
BLACK
BLACK
If the voltage does not appear, replace Main PCB.
Indicate or Display:
Refer to error code table.
Detective details:
When Heat exchanger temperature thermistor open or
short-circuit is detected at power ON or while running the compressor.
2.Thermistor failure
-30°C
-20°C
-10°C
-5°C
95.6
50.3
27.8
21.0
40°C
50°C
60°C
70°C
2.5
1.7
1.2
AO*G12LTC
THERMISTOR
(PIPE)
1
1
2
2
CN71
3
3
4
4
THERMISTOR
(DISCHARGE)
THERMISTOR
(OUTDOOR)
1
1
CN70
2
2
3
3
3. Main PCB failure
0°C
5°C
10°C
16.1
12.4
9.6
80°C
0.8
0.6
BLACK
1
1
BLACK
2
2
BROWN
3
3
BROWN
4
4
BLACK
1
1
2
2
BLACK
3
3
02-16
20°C
30°C
6.0
3.8
CN71
CN70
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Table of Contents
Troubleshooting
