Daikin R71FUV1 Service Manual page 383

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