Si20-701_B Troubleshooting by Remote Controller
376
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
NO (OFF)
YES
Check
of indoor unit
transmission error
H2P. Is H2P
blinking?
NO
Replace the
indoor unit PCB.
Replace the
indoor unit PCB
or correct power
supply system.
Check
of indoor unit
micro-computer
normal H1P. Is H1P
blinking?
Is H2P ON?
Is H1P blinking?
YES
Turn OFF the power
supply and turn the power
ON.
If outdoor unit micro-
computer normal H1P
blinks, it indicates
defective indoor unit PCB.
Resets normally.
External factor
(Noise, etc.).
NO
A
Caution
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
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