Daikin VRV EMERION RXYQ-AATJA Service Manual page 360

Troubleshooting by Error Code
353
Diagnosis Flowchart-3
U7-03
Error code Sub code
(Transmission error between Master
and Sub units)
The
multi transmission
wirings to multi Sub unit
have caused wiring disconnection
in them or are being
disconnected.
YES
Diagnosis Flowchart-4
U7-05
Error code Sub code
(Multi system error)
Multi outdoor unit
system?
YES
Diagnosis Flowchart-5
U7-06
Error code Sub code
(Manual address setting error for Sub
unit)
One of
outdoor unit
multi transmission wirings has
caused wiring disconnection in it
or been disconnected.
YES
NO
NO
NO
SiUS342303E
Replace the outdoor unit main
PCB (A1P) for multi Sub unit.
Modify the outdoor unit multi
transmission wirings, and then
reset the power supply.
Replace the outdoor unit main
PCB (A1P).
Disconnect the outdoor unit multi
transmission wirings, and then
reset the power supply.
Replace the outdoor unit main
PCB (A1P).
Modify the outdoor unit multi
transmission wirings, and then
reset the power supply.
Part 6 Service Diagnosis