Daikin R71FUV1 Service Manual page 44

Symptom-based Troubleshooting
Troubleshooting
Caution
Is the
type of remote
controller wired or
wireless?
Wireless
Is the
operation lamp
of indoor unit receiver
blinking?
NO
Heating:
Indoor unit
Cooling:
Outdoor unit
Does the fan
rotate?
YES
Is the filter
soiled?
NO
Is there
any interfering item
in airflow?
NO
Is the heat
exchanger soiled?
NO
Possible causes as
follows:
• Refrigerant
overcharge
• Mixing of air in
refrigerant system
• Defective pressure
switch
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
wired
Is the
operation lamp of
remote controller
blinking?
YES
NO
YES
YES
YES
YES
NO
Si20-701_B
Diagnose based
on the error code
on remote
controller
Defective fan
motor. Check the
magnetic switch
and aux. relay for
fan motor.
Cleaning
Remove the
interfering item.
Cleaning of the
heat exchanger
After vacuum
drying, charge
correct amount of
refrigerant.
Check the
pressure switch.
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