Si20-701_B Troubleshooting by Remote Controller
358
3.86
U1
Reverse Phase
Remote Controller Display
U1
Applicable Models
RY-F, R(Y)-G/GA/KU
(3-phase equipment only)
Method of Error Detection
Reverse phase detection circuit detects the phase of
each phase and determines whether it is normal phase,
reverse phase or lack of phase.
Supposed Causes
Defective power supply wiring connection
Power supply wiring is broken or disconnected.
Defective outdoor unit PCB
Troubleshooting
The error is
displayed again.
NO
YES
External factor
(Noise, etc.)
Replace the
outdoor unit
PCB.
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.
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