Daikin K-Series Service Manual page 93

SiBE061121.book Page 83 Monday, April 25, 2011 3:21 PM
SiBE061121
Troubleshooting
Check No.01
Refer to P.119
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check the operation condition.
NO
Condition OK?
YES
Check No. 12
Check the indoor electronic
expansion valve coil.
NO
OK?
YES
Check No. 01
·Radiant panel thermistors
·Indoor heat exchanger thermistor
·Room temperature thermistor
Does it
NO
conform to the
thermistor characteristic
chart?
YES
Check the air passage.
YES
Is there any short
circuit?
NO
Check the air filter.
YES
Is it very dirty?
NO
Check the indoor heat exchanger.
YES
Is it very dirty?
NO
Change the refrigerant to remove
moisture from the piping (after
drawing a vacuum).
NO
Error repeats?
YES
Replace the indoor unit PCB.
NO
Error repeats?
YES
∗
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.
Start operation within the
specified range of the outdoor
temperature.
Replace the indoor electronic
expansion valve coil.
Replace the thermistor.
·Radiant panel thermistors
·Indoor heat exchanger
thermistor
·Room temperature thermistor
Provide sufficient air passage.
Clean the air filter.
Clean the indoor heat
exchanger.
Completed.
Completed.
Replace the indoor heat
exchanger.
Troubleshooting
(R14647)
83