Si20-701_B Troubleshooting by Remote Controller
382
Troubleshooting
Diagnosis of incorrect or broken/disconnected wiring
If the LEDs on the indoor unit PCB are OFF, it indicates
that the transmission wiring between indoor and outdoor
units may be incorrect or broken/disconnected.
NO (ON or OFF)
YES
YES
YES
YES
NO (OFF)
NO
Replace the
indoor unit PCB.
Defective indoor
unit PCB or error
of power supply
system.
Is H2P ON?
Does
outdoor unit
micro-computer
normal H1P
blink?
Is
transmission
wire between indoor
and outdoor unit
wired correctly?
Is H1P blinking?
Is H1P blinking?
Is H2P blinking?
YES
NO
Wire correctly.
Turn OFF the power
supply and turn the power
ON.
Resets normally.
External factor
(Noise, etc.)
NO
NO
YES
A
Caution
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
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