Daikin R71FUV1 Service Manual page 389

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
Is H1P blinking?
YES
Is H2P blinking?
YES
A
382
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?
Does
outdoor unit
NO
micro-computer
normal H1P
blink?
transmission
wire between indoor
YES
and outdoor unit
wired correctly?
Troubleshooting by Remote Controller
NO
YES
YES
NO (OFF)
YES
Is
NO
Defective indoor
unit PCB or error
of power supply
system.
Resets normally.
External factor
(Noise, etc.)
Replace the
indoor unit PCB.
Wire correctly.