Daikin R71FUV1 Service Manual page 416

Troubleshooting by Remote Controller
Troubleshooting
Caution
Control
by 2 remote
controllers
All
indoor unit
PCB micro-computer
normal monitors
blinking
Using
multi-core
transmission
wiring between indoor
unit and remote
controller
Is "U5"
displayed constantly?
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
YES
NO
NO
both remote
controllers is set to
NO
YES
normally when
power supply is turned
OFF temporarily.
YES
NO
NO
YES
SS1 of
MAIN.
Resets
YES
Si20-701_B
YES
Set one of the
remote
controllers to
SUB, turn OFF
the power supply
temporarily, then
restart operation.
NO
Replace the
indoor unit PCB.
The error could
be produced by
noise.
Check the
surrounding area
and restart
operation.
Change to
double-core
independent
cable.
Defective remote
controller PCB or
replace the
defective indoor
unit PCB.
External factor
(Noise, etc.)
409