Daikin VRV II-Q RQYQ8-48PY1B Service Manual page 184

Troubleshooting by Remote Controller
Troubleshooting
174
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Check the indoor
unit for which
UE
YES
" " is displayed.
Is the the
transmission
UE
error ( ) caused
on all indoor
units?
NO
Is the power supply
NO
of the indoor unit on
UE
which the " "
occurred, turned
ON?
YES
Has the setting of
NO
centralized control group
No. been made with the
indoor unit on which the
UE
" " occurred?
YES
Was the
centralized control
NO
group No. for
indoor unit
changed?
YES
Can the setting of
YES
centralized control
group No. be
made?
NO
For VRV systems, can the
NO
setting of centralized control
group No. be made in one
and the same refrigerant
system?
YES
SiBE341027
Continued to A
(on the following
page)
Make sure there are no
hazardous situations, and
then turn ON the power
supply.
Make correct setting of the
centralized control group No.
Check outdoor units to which
the refrigerant system is
connected.
Check whether or not there
are no problems with the
transmission wiring length,
branch numbers, types of
cables and wires, number of
units connected, and others.
If no problems, replace the
indoor unit PCB.
Reset the power supplies of
every centralized controller.
For the intelligent Touch
controller, register the air
conditioner again while in
DIII-NET test run menu.
Service Diagnosis