System Abnormality, Refrigerant System Address Undefined - Daikin Super Multi Plus E-Series FTXG25EV1BW Service Manual

Troubleshooting for Outdoor Unit
7.34 System Abnormality, Refrigerant System Address
Undefined
UH
Remote
Controller
Display
Method of The system detects an indoor unit to which auto address has not been assigned.
Malfunction
Detection
Malfunction The malfunction decision is made as soon as the abnormality is detected.
Decision
Conditions
Supposed
Causes
Troubleshooting
After fixing incorrect wiring,
push and hold the RESET
button on the outdoor unit
PCB for 5 seconds.
422
Improper connection of transmission wiring between indoor and outdoor unit
Defective indoor unit PCB
Defective main PCB (A1P)
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is the
electricity
being introduce for
the first time after
YES
installation or after an indoor
or outdoor unit PCB
has been
replaced?
NO
Is the
indoor unit - outdoor unit
transmission wiring
normal?
YES
Does a malfunction occur?
YES
Does
UH
a " " malfunction occur
for all indoor units in
the system?
YES
Does
a malfunction
occur even after 12
minutes elapses from the
time when electricity is
introduced to indoor
unit and outdoor
unit?
YES
NO
NO
NO
SiBE18-821_C
NO
Normal
After fixing incorrect wiring,
push and hold the RESET
button (BS5) on the service
PCB (A2P) for 5 seconds.
∗ The unit does not run for up
to 12 minutes.
Normal
Replace the indoor unit PCB.
Replace the main PCB (A1P).
(R13054)
Troubleshooting