Daikin 2MXS-N Series Service Manual page 151

SiUS121502E
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
Turn on
the power. System
restarted? (Repeat a few
times.)
NO
Error
again within 3 minutes
after turning on the
power?
YES
NO
YES
NO
(Precaution before turning on the power again)
Make sure the power has been off for at
least 30 seconds.
Disturbance factors
YES
∗ Noise
∗ Power supply distortion
NO
Troubleshooting for Outdoor Unit
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).
Replace the indoor
unit PCB (control PCB).
(R20413)
139