Troubleshooting by Remote Controller
SiBE341027
174
Service Diagnosis
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
For VRV systems, can the
setting of centralized control
group No. be made in one
and the same refrigerant
system?
Was the
centralized control
group No. for
indoor unit
changed?
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.
NO
YES
Continued to A
(on the following
page)
YES
Check the indoor
unit for which
“
UE
” is displayed.
Is the the
transmission
error (
UE
) caused
on all indoor
units?
Is the power supply
of the indoor unit on
which the “
UE
”
occurred, turned
ON?
Has the setting of
centralized control group
No. been made with the
indoor unit on which the
“
UE
” occurred?
NO
NO
YES
Can the setting of
centralized control
group No. be
made?
Make sure there are no
hazardous situations, and
then turn ON the power
supply.
NO
NO
YES
YES
NO
YES
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.
