Daikin RXYQ-TA Series Service Manual page 303

SiUS341615E
Troubleshooting
Service Diagnosis
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
PCB has been
replaced?
NO
Is
indoor -
outdoor and outdoor -
outdoor unit transmission
wiring normal?
YES
Press and hold the RESET
button on the outdoor unit
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
Troubleshooting by Error Code
NO
Normal
After fixing incorrect wiring,
press and hold the RESET
button on the master outdoor
unit 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).
290