Daikin VRV EMERION RXYQ-AATJA Service Manual page 375

SiUS342303E
Troubleshooting
Note(s)
1. Refer to the installation manual for correct "indoor unit and outdoor unit
Part 6 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
YES
installation or after an indoor
or outdoor unit PCB
has been
replaced?
NO
Is
indoor-outdoor
and outdoor-outdoor unit
transmission wiring
normal? (1)
YES
Press the RETURN (BS3)
button on the outdoor unit
PCB for 5 seconds.
Error is displayed
again?
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
connection wiring".
Does
an error occur
even after 12 minutes
elapses 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 the incorrect wiring,
press the RETURN (BS3)
button on the outdoor unit main
PCB for 5 seconds.
 The unit will not run for up to
12 minutes.
Normal
Install the DIII-NET extension
adaptor.
Replace the indoor unit control
PCB.
Replace the outdoor unit main
PCB (A1P).
368