Daikin RXYQ5-48MAY1 Service Manual page 263

Troubleshooting (OP: Schedule Timer)
Troubleshooting
252
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Has
an indoor unit
YES
once connected been
removeor its address
changed?
NO
Is
the power supply
NO
turned on for indoor
units displaying
malfunction?
YES
Is
transmission wiring
YES
disconnected or wired
incorrectly?
NO
Is
transmission with all NO
indoor units
malfunctioning?
YES
Is
the transmission
YES
wiring with the master
controller disconnected or
wired incorrectly?
NO
Is
the master controller's
YES
connector for setting
master controller
disconnected?
NO
Is the group
NO
No. of malfunctioning
indoor units set?
YES
Si39-407
Reset power supply
simultaneously for all optional
controllers for centralized
control.
Turn indoor unit's power
supply.
Fix the wiring correctly.
Set the group No. correctly.
Replace indoor unit PC board.
Fix the wiring correctly.
Connect the connector
correctly.
Replace the central PC board.
(V2836)
Troubleshooting