Daikin RXYQ-TA Series Service Manual page 299

SiUS341615E
Troubleshooting
Service Diagnosis
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 transmission error
UE 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
central control
group No. been made
with the indoor unit on
which the UE
occurred?
YES
Was the
central control
group No. for indoor
unit changed?
YES
YES
NO
Can the
NO
setting of central
control group No be
made?
NO
For
VRV systems,
can the setting of
central control group No. be
made in one and the
same refrigerant
system?
YES
NO
Troubleshooting by Error Code
Continued to A
(on the following
page)
Make sure there are no
hazardous situations, and
then turn ON the power
supply.
YES
Make correct setting of the
central control group No.
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.
286