Daikin R71FUV1 Service Manual page 317

Si20-701_B
Troubleshooting
Caution
(Note) Measure current
in U, V and W within 30
seconds using clamp
meter.
Disconnect compressor
inverter.
(Note) Within ±5%
between phases U and
V, between V and W
and between W and U.
(Note) Check for
element cracking, loose
connections, connector
disconnection and
damaged parts.
Note:
∗1. Guideline values
Model
RZ(Y)71~125L
310
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
Is the
difference
between high and
low pressure levels
less than 0.2
MPa?
YES
Is
secondary
current of inverter
A (∗1) in each
phase?
NO
Is
inverter
output voltage
same in all 3
phases?
NO
Check
main circuit parts.
OK
Instantaneous overcurrent detection value
Troubleshooting by Remote Controller
NO
YES
YES
NG
24.0A
Defective
pressure
equalization.
Inspect
refrigerant
system.
Compressor
seizing.
Inspect
compressor and
refrigerant
system.
Inspect
compressor.
Correct the
wiring.
Defective main
circuit parts.
Defective inverter