Daikin VRV RXYQ72-384XAYCA, Service Manual

Page: 357 / 419

SiUS342004EB Troubleshooting by Error Code
Part 6 Service Diagnosis 350
Troubleshooting
Is the
power s u pply of
the indoor u nit, on which
the UE occ u rred,
t u rned ON?
For
VRV systems,
can the setting of
central control gro u p No. b e
made in one and the
same refrigerant
system?
Has
the setting of
central control gro u p
No. b een made with the
indoor u nit on which the
UE occ u rred?
Can the
setting of central
control gro u p No b e
made?
Check
the indoor
u nit for which UE
is displayed. Is the
transmission error UE
ca u sed on all
indoor u nits?
Was the
central control
gro u p No. for indoor
u nit changed?
Make correct setting of the
central control gro
u p No.
Check o u tdoor u nits to which
the refrigerant system is
connected.
Check whether or not there are
no pro
b lems with the
transmission wiring length,
types of ca
b les and wires,
n u m b er of u nits connected, and
others. If no pro b lems, replace
the indoor u nit control PCB.
NO
YES
YES
NO
NO
YES
Make s u re there are no
hazardo u s sit u ations, and
then t u rn ON the power
s u pply.
NO
NO
YES
YES
NO
YES
Reset the power s u pplies of
e v ery centralized controller.
For the intelligent To u ch
Controller, register the air
conditioner again while in
DIII-NET test r
u n men u .
Caution
Be s u re to t u rn off the power switch b efore connecting or disconnecting
connectors, or parts may b e damaged.
A
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