Daikin VRV IV-S RXTQ-TAVJU Series Service Manual page 217

SiUS331604E
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
UE
unit for which 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
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
NO
setting of centralized
control 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
Troubleshooting by Error Code
A
Make sure there are no
hazardous situations, and
then turn ON the power
supply.
YES
Make correct setting of the
centralized 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 operation menu.
204