Troubleshooting by Remote Controller Si20-701_B
359
Remote Controller Display
U1
Applicable Model
R(Y)-LU, RR-M, RZQ-C7
Method of Error Detection
The reverse phase detection circuit detects the phase of
each phase and judge whether it is normal or reverse.
Possible Causes
îš„ Defective connection of power supply wiring
îš„ Disconnection in power supply wiring
Troubleshooting
Error is
displayed again.
NO
YES
External factor
(Noise, etc.)
Are the
phases of circuit
breaker matched?
YES
NO
Does
imbalance in
the power supply
voltage occur?
(±10%)
Interchange the
power supply
cables.
Turn OFF the power
supply and turn the power
ON.
Caution
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
YES
Check for the
power supply
facilities.
NO
Replace the
outdoor unit
PCB.
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