Is the
power supply of
the indoor unit, on which
the UE occurred,
turned ON?
For
VRV
systems,
can the setting of
central control group No. be
made in one and the
same refrigerant
system?
Has
the setting of
central control
group No. been made with
the indoor unit on
which the
UE
occurred?
Can the
setting of central
control group No be
made?
Check
the indoor
unit for which
UE is displayed. Is
the transmission error
UE caused on
all indoor
units?
Was the
central control
group No. for indoor
unit changed?
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,
types of cables and wires,
number of units connected,
and others. If no problems,
replace the indoor unit PCB.
NO
YES
YES
NO
NO
YES
Make sure there are no
hazardous situations, and
then turn ON the power
supply.
NO
NO
YES
YES
NO
YES
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.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
A
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