Service Manual

CN63

THERMISTOR

SC (LP OUT)

(HEX. PIPE. OUT.)

BLACK

123

BLACK

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

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 5".

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)

Indoor Unit : Operation LED 7 times Flash, Timer LED 3 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. 73. 3

Error Code : 73

If the voltage does not appear, replace Main PCB

, and execute

the check operation again.

If the voltage does not appear,

02-36

Heat Ex. Liquid Outlet Temp.

Thermistor Error

Trouble shooting 19

Indicate or Display:

Detective Actuators:

Detective details:

OUTDOOR UNIT Error Method:

Forecast of Cause :