DC
CN143
THERMISTOR
THERMISTOR
(SUC. TEMP.)
(HEX. EXIT.)
BLACK
BLACK
1 2 3 4
1 2 3 4
BLACK
BLA
C
K
Heat exchanger liquid temperature
thermistor
Heat exchanger liquid temperature thermistor short or open detected
1. Connector connection defective, open
2. Thermistor defective
3. Main PCB defective
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 22".
Check Point 3 : Check voltage of Main PCB (DC5.0V)
Main PCB (CN143:3-4) voltage value = 5V
Remove the thermistor from Main PCB, check the voltage.
Heat exchanger liquid temperature sensor (CN143:3-4)
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous Flash.
Outdoor Unit : E. 73. 3
Error Code : 73
If the voltage does not appear, replace Main PCB and set up orignal address.
(Refer to 06-03 page Main PCB removal.)
If the voltage does not appear, replace Main PCB and set up orignal address.
04-38
Outdoor Unit Heat Ex. Liquid Temp.
Sensor Error
Trouble shooting 30
Indicate or Display:
Detective Actuators:
Detective details:
OUTDOOR UNIT Error Method:
Forecast of Cause :
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