Daikin RXQ12AHR Service Manual page 292

Troubleshooting by Error Code
Troubleshooting
286
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is
electricity
being introduced
for the first time after
installation or after an indoor
or outdoor unit main
PCB has been
replaced?
NO
Is
indoor-outdoor
and outdoor-outdoor
unit transmission
wiring normal?
YES
Press and hold the RETURN
(BS3) button on the outdoor
unit main PCB for 5 seconds
Does an error occur?
YES
Disconnect
the
outdoor-outdoor unit
transmission wiring to
create the one-system
status, and then check
whether or not the
system is
normal.
NO
Does a UH
error occur for all
indoor units in the
system?
YES
Does
an error
occur even after
12 minutes elapses
YES
from the time when electricity
is introduced to indoor
and outdoor units?
YES
NO
NO
YES
NO
SiAF341904E
NO
Normal
After fixing incorrect wiring,
press and hold the RETURN
(BS3) button on the master
outdoor unit main PCB for 5
seconds.
The unit will not run for up to
12 minutes.
Normal
Mount the DIII-NET extension
adaptor.
Replace the indoor unit PCB.
Replace the outdoor unit main
PCB (A1P).
Part 6 Service Diagnosis