Daikin FTX20K(2)V1B Service Manual page 67

SiBE041525F
Troubleshooting
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check the power supply voltage.
Is the
voltage fluctuation
within ±10% from the
rated value?
YES
Check the connection of the
compressor harness.
Loose or
disconnected?
NO
Does the
outdoor fan rotate
smoothly?
YES
(Precaution before turning on the power again)
Make sure the power has been off for at
least 30 seconds.
Turn on
the power. System
restarted? (Repeat a few
times.)
NO
NO
YES
NO
Disturbance factors
YES
∗ Noise
∗ Power supply distortion
Troubleshooting
Correct the power supply.
Reconnect the harness.
Replace the outdoor fan motor
and the outdoor unit PCB
(main PCB).
Check for such factors for a
long term.
Replace the outdoor
unit PCB (main PCB).
(R22990)
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