Daikin FTXR42EV1B9 Especificaciones Pagina 141

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SiBE04-624_B Troubleshooting
Service Diagnosis 131
2.39 Heater Wire Abnormality
Error Code
PA
Method of Error
Detection
An error is identified when the outlet temperature of humidifying fan does not reach a certain
temperature within a given time after the heater is turned on.
Error Decision
Conditions
When the temperature detected by the humidifying thermistor is lower than the outdoor
temperature (with the heater turned off) + 6°C, and this condition continues for 30 minutes.
Supposed
Causes
Breakage of heater filament
Breakage of heater harness
Abnormal temperature detected by outdoor temperature thermistor
Abnormal temperature detected by humidifying thermistor
Defective main relay
Blown thermal fuse
Defective heater control part
Extremely low voltage
Troubleshooting
Check No.01
Refer to P.134
(R18135)
Caution
YES
YES
YES
Is the supply voltage
appropriate?
Turn off the power supply.
YES
NO
NO
NO
NO
Is the heater
resistance
appropriate?
At normal temperature:
44.6 ± 10%
Is the thermal fuse blown?
NO
YES
Check No.01
Is a resistance of the
humidifying thermistor
appropriate?
Is the heater well cooled?
Cool the
heater down.
Measure the resistance
between the heater connectors.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Modify the supply voltage.
Replace the heater ASSY.
Replace the heater ASSY.
Replace the thermistor.
*For details, refer to PH
troubleshooting
Replace the indoor unit
PCB (control PCB).
*Main relay may be
damaged.
When the main relay
(MRM10) is damaged,
heater and rotor do not run.
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