Daikin VRV RXYQ72-384XAYCA, Service Manual

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Troubleshooting by Error Code SiUS342004EB
335 Part 6 Service Diagnosis
NO
NO
YES
YES
NO
YES
YES
Connect the power s u pply ca b le
of the external control adaptor
for o
u tdoor u nit to the 16 VDC
power s u pply line.
Replace the o u tdoor u nit main
PCB (A1P).
Replace the external control
adaptor PCB.
Replace the o u tdoor u nit
main PCB (A1P).
NO
NO
YES
Modify the transmission wirings
to the external control adaptor for
o
u tdoor u nit.
Diagnosis Flowchart-1
S u pply power to the o u tdoor
u nit.
Is power s u pplied to
the o u tdoor u nit?
Is the
normal
operation monitor LED
on the o u tdoor u nit
main PCB
b linking?
Is the
normal
operation monitor LED
on the external control
adaptor for o u tdoor
u nit b linking?
(Transmission error when the
external control adaptor is mo
u nted)
Is the
power
s u pply ca b le of the
external control adaptor
for o u tdoor u nit connected
to the 16 VDC
power s u pply
line?
Is
there any
wiring
disconnection or wiring
error in the transmission
wirings to the external
control adaptor for
o u tdoor u nit?
Error code S ub code
U7-01