Trouble shooting 15
OUTDOOR UNIT Error Method:
Indicate or Display:
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 2 :
Check Point 3 :
OK
OK
OK
OK
DC
Outdoor unit Heat Ex. liquid temp.
sensor error
Outdoor unit Main PCB
Heat exchanger temperature thermistor
When the heat exchanger temperature thermistor open 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
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.
02-17
Refer to error code table.
Resistance Value (k )
Temperature(°C)
Resistance Value (k )
Temperature(°C)
-30 -20 -10 0 10 20 30 40 50
60 70 80
95.6 50.3 27.8 16.1 9.6 6.0 3.8 2.5 1.7
1.2 0.8 0.6
Thermistor Characteristics (Approx. value)
If Thermistor is either open or shorted, replace it and reset the power.
THERMISTOR
(DISCHARGE)
THERMISTOR
(PIPE MID)
THERMISTOR
(PIPE)
THERMISTOR
(COMP)
THERMISTOR
(OUTDOOR)
BLACK
BLACK
BLACK
CN70 CN72 CN73 CN71
1 2 3 4
1 2 3 4
1 2 3
1 2 3
BROWN
BROWN
1 2
1 2
1 2
1 2
AMP Air Conditioning
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