Operation Halt Due To Thermistor Error Or Disconnection Detection - Daikin FTK25JVE9 Service Manual

Si04-115
5.10 Operation Halt Due to Thermistor Error or Disconnection
Detection
J3, J6, J3,
J3, J3,
Remote
Controller
Display
Outdoor unit LED A
Display
Method of Thermistor errors are detected using thermistor input voltage to micro computer. (Thermistor
errors are detected using the temperatures detected by the thermistors.)
Malfunction
Detection
Malfunction When the thermistor input during compressor operation is more than 4.96 V or less than 0.04 V.
∗
Decision
Conditions
"
Supposed
"
Causes
"
Troubleshooting
Check No.5
Refer to P.88
J3 : Discharge pipe thermistor
J6 : Outdoor unit heat exchanger thermistor
H9 : Outside air thermistor
Service Diagnosis
J6, H9 H9 H9 H9
J6, J6,
5
Value changes depends on models
Faulty connector connection
Faulty thermistor
Faulty PCB
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Check the connector connection.
Is it normal?
YES
Check No. 5
Thermistor resistance check
Is it normal?
YES
NO
NO
Trouble shooting
Correct the connection.
Replace the thermistor.
Replace the outdoor unit P.C.B.
(R1952)
75