Refer to error code table.
(HEX. PIPE. OUT.)
Heat exchanger outlet temp. thermistor
Heat exchanger middle temp. thermistor
Heat exchanger liquid temperature thermistor short or open detected
1. Connector connection defective, open
2. Thermistor failure
3. Main PCB failure
OK
OK
Check Point 1 : Check the connector connection and cable open
Connector connection state check
Cable open check
Check Point 2 : Check the thermistor
Thermistor characteristics check (Disconnect the thermistor from the PCB and check.)
* For the thermistor characteristics, refer to the "Service Parts Information 7".
Check Point 3 : Check voltage of Main PCB (DC5.0V)
Main PCB (CN25:1-3, CN22:1-2) voltage value = 5V
Remove the thermistor from Main PCB, check the voltage.
Heat exchanger outlet/ middle temperature thermistor (CN25:1-3/ CN22:1-2)
If the voltage does not appear, replace Main PCB
, and execute
the check operation again.
If the voltage does not appear,
02-16
Heat Ex. Liquid Temp.
Thermistor Error
Trouble shooting 14
Indicate or Display:
Detective Actuators:
Detective details:
OUTDOOR UNIT Error Method:
Forecast of Cause :
CN25
THERMISTOR
BLACK
BLACK
1
2
3
1
2
3
(HEX. PIPE. MID.)
CN22
THERMISTOR
BLACK
BLACK
1 2
1 2
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