Daikin VRV-WIII RWEYQ72PTJU Service Manual page 244

Troubleshooting by Indication on the Remote Controller
Troubleshooting
236
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Check the
indoor unit for which
UE
" " is displayed. Is the
UE
transmission error " " caused
on all indoor units?
NO
Is the
power supply of the
indoor unit on which the
UE
" " occurred, turned
ON?
YES
Has the
setting of
centralized control
group No. been made with the
indoor unit on which the
UE
" " occurred?
YES
Was the
centralized control
group No. for indoor unit
changed?
YES
YES
NO
Can the
setting of
centralized control
NO
group No. be made?
NO
For
VRV
systems, can the
setting of centralized
control group No. be made in
one and the same
refrigerant system?
YES
NO
SiUS30-1301
Continued to A (on the
following page)
Make sure there are no
hazardous situations, and then
turn the power ON.
YES
Make correct setting of the
centralized control group No.
NO
Check condensing 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 control
equipment.
For the intelligent Touch
controller/manager, register the
air conditioner again while in
DIII-NET test operation menu.
Service Diagnosis