n
Temperature Sensor
Resistance
TH1
10 KΩ±1 %(25 ℃)
1.07 KΩ±3.3 %(85 ℃)
5 KΩ±1 %(25 ℃)
535 KΩ±3.3 %(85 ℃)
200 KΩ±1 %(25 ℃)
28 KΩ±7.7 %(85 ℃)
TH2
TH3
1) outdoor temperature sensor : TH1
2) Suction pipe(S-pipe) temperature sensor : TH2
3) Discharge pipe(D-pipe) temperature sensor : TH3
4) Outdoor heat exchanger (center of condenser) temperature sensor :TH2
1. Check the condition of installation and the contact of temperature sensor.
2. Check whether the connector contact of temperature sensor is normal.
3. Measure the resistance of temperature sensor.
n
4Way valve
6) While the coil is mounted on the valve, insulation resistance shall be 100MΩ or more when it is measured with
DC mega tester (DC 500 V).
1) It maintains OFF state until power is applied and the product is turned on.
2) During the cooling operation, defrost operation, and oil recovery: OFF, during heating operation: ON
3) If it is changed from cooling operation to heating operation, it is activated for 3 minutes and converts 4Way
valve.
4) You can check whether 4Way valve is in cooling/heating operation mode by touching the service valve pipe sur-
face.
5) 4Way valve refrigerant flow diagram
E
E
C
C
D
D
S-Pipe
[During heating operation]
[During cooling operation]
S-Pipe
Outdoor heat
exchanger
Outdoor heat
exchanger
Indoor heat
exchanger
The phenomena from main component failure
- 42 -
