Daikin RTSQ20PY1 Service Manual page 329

SiBE31-801_C
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
UE
YES
which " " is displayed. Is
the transmission
malfunction (UE) caused
on all indoor units?
NO
Is the power supply of the NO
UE
indoor unit on 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
NO
centralized control
group No. for
indoor unit
changed?
YES
Troubleshooting by Indication on the Remote Controller
Can the setting of YES
centralized control group
No be made?
NO
For VRV systems, can the setting
NO
of centralized 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
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,
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.
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