Trouble shooting 21
OUTDOOR UNIT Error Method:
Indicate or Display:
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 2 :
Check Point 3 :
OKOK
OKOK
86°F
103176233312Resistance Value (k )
68°F
134
59°F50°F41°F32°F14°F 23°F
Temperature(°F)
39.6
25.6 17.1Resistance Value (k )
122°F
140°F 158°F
11.6
176°F
8.12
194°F
5.78
212°F
4.19 3.09
62.980.3
104°F
Temperature(°F)
3-way valve Thermistor Error
Outdoor Unit Main PCB Circuit
3-way valve Temperature Thermistor
When 3-way valve Temperature Thermistor open or short-circuit is
detected at power ON or while running the compressor.
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.
Check Point 2 : Remove connector and check Thermistor resistance value
Thermistor Characteristics (Approx. value)
If Thermistor is either open or shorted, replace it and reset the power.
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)
If the voltage does not appear, replace Main PCB.
02-25
BLACK
RED
RED
RED
RED
RED
RED
RED
GRAY
BROWN
BLACK
BLUE
YELLOW
RED
BLACK
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
RED
WHITE
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
1
4
5
6
7
8
9
CN40
CN39
VALVE THERMISTOR A, B
2-WAY VALVE A
3-WAY VALVE A
2-WAY VALVE B
3-WAY VALVE B
2-WAY VALVE C
3-WAY VALVE C
ORANGE
GREEN
2-WAY VALVE C
3-WAY VALVE C
Refer to error code table.
VALVE THERMISTOR D (For AOU36RLXFZ)
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