Troubleshooting by Indication on the Remote Controller
113
Troubleshooting
The
inverter
compressor operates
normally.
Is it a high
differential pressure
at the time of
startup? (
∗
1)
Is the
UVWN wire
connection
proper?
Is
the stop valve
opened?
NO
YES
Open the stop
valve.
NO
NO
Connect
properly.
NO
Replace the
compressor.
YES
YES
Eliminate the
causes.
The hot gas
bypass valve
may not be
opened.
Check it.
Restart operation after
resetting operation.
YES
Disconnect the connection
between the compressor
and the inverter and turn
on power transistor check
mode setting using
“Setting Mode 2” on the
outside unit PCB.
Measure inverter output
voltage.
Note: Take measurements
while frequency is
stable.
Caution
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
A
