Daikin FCQ18PVJU Service Manual page 146

Troubleshooting by Indication on the Remote Controller
Troubleshooting
139
Be sure to turn off the power switch before connecting or disconnecting
Caution
the connector, or parts could be damaged.
Has
an indoor unit once
YES
connected been removed
or its address
changed?
NO
Is
the power supply
NO
turned on for indoor units
displaying
malfunction?
YES
Is
transmission wiring
NO
disconnected or
wired incorrectly?
YES
Is
transmission with
NO
all indoor units
malfunctioning?
YES
Is
the transmission
NO
wiring with the master
controller disconnected
or wired
incorrectly?
YES
Is the
master controller's
NO
connector for setting
master controller
disconnected?
YES
Is the group
NO
No. of malfunctioning
indoor units set?
YES
SiUS28-902_a
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 P.C.B.
Fix the wiring correctly.
Connect the connector
correctly.
Replace the central P.C.B.
Troubleshooting