Transmission Error Between Centralized Control Equipment And Indoor Unit - Daikin Aurora Series Service Manual

SiUS341802E
2.68 Transmission Error between Centralized Control
Equipment and Indoor Unit
UE
Error Code
Applicable
All indoor unit models
Central remote controller
Models
Method of Error Microcomputer checks if transmission between indoor unit and centralized control equipment is
normal.
Detection
Error Decision
When transmission is not carried out normally for a certain amount of time
Conditions
Supposed
Causes
Troubleshooting
Service Diagnosis
Schedule timer
Transmission error between optional controllers for centralized control equipment and indoor
unit
Connector for setting main controller is disconnected.
(or disconnection of connector for independent / combined use changeover switch.)
Defective PCB for central remote controller
Defective indoor unit PCB
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
A
Go to the next 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 control
equipment.
For the intelligent Touch
controller, register the air
conditioner again while in
DIII-NET test run menu.
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