Daikin R407C PLUS - Troubleshooting (OP: Central Remote Controller); Malfunction of Transmission between Central Remote Controller and Indoor Unit

Troubleshooting (OP: Central Remote Controller) Si33-105
204 Troubleshooting R407C PLUS Series Heat Recovery System
6. Troubleshooting (OP: Central Remote Controller)
6.1 Malfunction of Transmission Between Central Remote
Controller and Indoor Unit
Remote
Controller
Display
UE
Supposed
Causes
!
Malfunction of transmission between optional controllers for centralized control and indoor
unit
!
Connector for setting master controller is disconnected.
!
Failure of PC board for central remote controller
!
Defect of indoor unit PC board
Troubleshooting
Is
the power supply
turned on for indoor units
displaying
malfunction?
Is
transmission wiring
disconnected or
wired incorrectly?
Is
the transmission
wiring with the master
controller disconnected
or wired
incorrectly?
Is the
master controller's
connector for setting master
controller
disconnected?
Set the group No. correctly.
Replace indoor unit PC board.
Fix the wiring correctly.
Fix the wiring correctly.
Connect the connector
correctly.
Replace the central PC board.
Reset power supply
simultaneously for all optional
controllers for centralized
control.
YES
YES
NO
YES
YES
YES
YES
Turn indoor unit's power supply.
YES
NO
NO
NO
NO
NO
NO
Has
an indoor unit once
connected been remove
or its address
changed?
Is the group
No. of malfunctioning
indoor units set?
Is
transmission with
all indoor units
malfunctioning?
(VF071)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.