SiBE061121_A
Troubleshooting
Service Diagnosis
69
Troubleshooting
Check No.01
Refer to P.106
Check No.12
Refer to P.108
YES
YES
NO
NO
NO
NO
NO
(R18364)
YES
Caution
Replace the indoor electronic
expansion valve coil.
Replace the thermistor.
∗
Radiant panel thermistors
∗
Indoor heat exchanger
thermistor
∗
Room temperature
thermistor
Provide sufficient air passage.
YES
Check No. 01
∗
Radiant panel thermistors
∗
Indoor heat exchanger
thermistor
∗
Room temperature thermistor
Check the air passage.
Check the operation condition.
Check the air filter.
OK?
As
described in the
thermistor characteristic
chart?
Is there any short
circuit?
YES
Clean the indoor heat
exchanger.
Very dirty?
YES
Clean the air filter.
Very dirty?
NO
Completed.
Error repeats?
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Check No. 12
Check the indoor electronic
expansion valve coil.
YES
NO
Start operation within the
specified range of the outdoor
temperature.
Condition OK?
Check the indoor heat exchanger.
Replace the indoor unit PCB.
Change the refrigerant to remove
moisture from the piping (after
drawing a vacuum).
YES
NO
Completed.
Replace the indoor heat
exchanger.
Error repeats?
∗
When the outdoor temperature is below the
lower limit for cooling operation (10˚C), the
freeze-up protection control is activated and the
cooling operation stops.
