Daikin RQYQ140-180PY1 Service Manual page 193

SiBE341001
Troubleshooting
Troubleshooting
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
" " is displayed.
YES
Is the transmission
malfunction (UE)
caused on
all indoor
units?
NO
Is the
power supply of
NO
the indoor unit on which
UE
the " " occurred,
turned ON?
YES
Has
the setting of
NO
central control group No.
been made with the
indoor unit on which
UE
the " "
occurred?
YES
Was
the central
NO
control group No.
for indoor unit
changed?
YES
Troubleshooting by Remote Controller
Can
the setting of YES
central control group
No. be made?
NO
For VRV
systems, can the
NO
setting of central control group
No. be made in one and
the same refrigerant
system?
YES
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
central 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.
184