Refer to error code table.
D
Heat exchanger liquid temperature
thermistor
Heat exchanger outlet 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 8".
Check Point 3 : Check voltage of Main PCB (DC5.0V)
Main PCB (CN63:1-2) voltage value = 5V
Remove the thermistor from Main PCB, check the voltage.
Heat exchanger outlet temperature thermistor (CN63:1-2)
If the voltage does not appear, replace Main PCB, and execute
the check operation again.
If the voltage does not appear,
02-17
Heat Ex. Outlet Temp.
Thermistor Error
Trouble shooting 14
Indicate or Display:
Detective Actuators:
Detective details:
OUTDOOR UNIT Error Method:
Forecast of Cause :
5
5
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