Heat Ex.2 Liquid Temp
Sensor Error
OK
DC
Heat ex.2 liquid temp. sensor
Heat ex.2 liquid temp. sensor short or open detected
1. Connector connection defective, open
2. Sensor defective
3. Main PCB defective
OK
Check Point 1 : Check the connector connection and cable open
Connector connection state check
Cable open check
Check Point 2: Check the sensor
Sensor characteristics check (Disconnect the sensor from the PCB and check.)
* For the sensor characteristics, refer to the "Service Parts Information 25".
Check Point 3 : Check voltage of Main PCB (DC5.0V)
Main PCB (CN164: 1-2) voltage value = 5V
Remove the sensor from Main PCB, check the voltage.
Heat ex.2 liquid temp. sensor (CN164: 1-2)
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous Flash.
Outdoor Unit : E. 7 3. 7
Error Code : 9 U / 7 3
If the voltage does not appear, replace Main PCB and set up original address
Trouble shooting 40 E73. 7
Indicate or Display:
Detective Actuators:
Detective details:
OUTDOOR UNIT Error Method:
Forecast of Cause :
1
2
3
4
5
6
7
1
2
3
4
5
6
7
BLACK
BLACK
BLACK
BLACK
THERMISTOR (HEX. LIQ.2)
THERMISTOR (HEX. GAS.2)
CN164
04-49
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