Refer to error code table.
Heat Sink Thermistor Error
OK
(HEATSINK PFC)
Heat Sink temperature thermistor (INV)
Heat Sink temperature thermistor (PFC)
Heat sink temperature thermistor short or open detected
1. Connector connection defective, open 2. Thermistor failure
3. Main PCB failure 4. Inverter PCB failure
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 (CN23:1-2) voltage value = 5V
Inverter PCB (CN803:1-2) voltage value = 5V
Remove the thermistor from Main PCB, check the voltage.
Heat sink temp. thermistor
(CN23:1-2)
If the voltage does not appear, replace Main PCB
, and execute
the check operation again.
If the voltage does not appear, replace Main PCB
02-18
Remove the thermistor from Inverter PCB, check the voltage.
Trouble shooting 16
Indicate or Display:
Detective Actuators:
Detective details:
OUTDOOR UNIT Error Method:
Forecast of Cause :
CN23
THERMISTOR
BLACK
BLACK
1 2
1 2
(HEATSINK INV)
Heat sink temp. thermistor
(CN803:1-2)
CN803
THERMISTOR
BLACK
BLACK
1 2
1 2
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