Daikin R71FUV1 Service Manual page 334

Troubleshooting by Remote Controller
Troubleshooting
Caution
Imbalance in
supplied voltage is in
excess of 14 V.
(∗1)
NO
Is the
voltage
imbalance applied to
the inverter in excess
of 14 V? (∗2)
NO
A
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
YES
Open phase?
YES
YES
NO
Si20-701_B
Open phase
Normalize the
field cause.
Fix the power
supply voltage
imbalance.
Part or wiring
defect
After turning the
power supply
OFF, check and
repair the main
circuit wiring or
parts.
(1) Loose or
disconnected
wiring
between
power supply
and inverter
(2) K2 contact
disposition,
fusion or
contact is
poor.
(3) Loose or
disconnected
noise filter
327