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