8 Troubleshooting
243
SMGB0087 rev.0 - 12/2013
8
Alarm code
14
Abnormal operation of the thermistor for the indoor unit heat exchanger gas pipe temperature (gas
piping thermistor)
- This alarm code is displayed when the thermistor is short-circuited (less than 0.24 kΩ) or cut (greater than 840 kΩ)
during the cooling process or the heating process. The system is automatically restarted when the fault is removed.
Is THM5 (gas pipe) connected
to I.U. PCB?
Connect it
No
Yes
Is the resistance of THM5
between 0.24kΩ and 840kΩ?
Faulty thermistor
No
Yes
Faulty PCB
Refer to the thermistor
resistance in Alarm 11
Phenomenon Cause Check item
Action
(Turn OFF the main switch)
Faulty gas piping thermistor
Fault Check the resistance Replace the thermistor if faulty
Incorrect connection Check the connection
Repair the wiring and
connections
Faulty PCB
Replace PCB and check the
operation
Replace PCB if faulty
Thermistor
resistance
(kΩ)
Air temperature (ºC)
Thermistor characteristics
Examples
Heat exchanger gas pipe
thermistor (THM3) in case of
4-way cassette
Gas Pipe Thermistor (THM5)
Gas Pipe Thermistor
Gas Pipe Thermistor
To Next Page
Loading...
