Troubleshooting (Op: Unified On/Off Controller); Operation Lamp Blinks - Daikin R407C PLUS Service Manual

Troubleshooting (OP: Unified ON/OFF Controller)

8. Troubleshooting (OP: Unified ON/OFF Controller)

8.1

Operation Lamp Blinks

Remote

Operation lamp blinks

Controller
Display
!
Supposed
!
Causes
!
!
!
Troubleshooting
214
Malfunction of transmission between optional controller and indoor unit
Connector for setting master controller is disconnected
Defect of unified ON/OFF controller
Defect of indoor unit PC board
Malfunction of air conditioner
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Is a malfunction
code displayed on the remote
controller?
NO
Has a once
connected indoor unit been
removed or its address
changed?
NO
Is the power
supply for the indoor unit
displaying a malfunction
turned on?
YES
Is
transmission wiring
disconnected or wired
incorrectly?
NO
Is transmission
with all indoor units
malfunctioning?
YES
Is
the transmission
wiring with the master
controller disconnected or
wired incorrectly?
YES
Is the master
controller's connector for
setting master controller
disconnected.
NO
Replace the central PC board.
YES
YES
NO
YES
NO
Is the group
No. of malfunctioning indoor
units set?
YES
Replace indoor unit PC board.
NO
YES
Troubleshooting R407C PLUS Series Heat Recovery System
Si33-105
Diagnose the cause with the
air conditioner's failure
diagnosis manual.
Reset power supply for all
optional controllers for
centralized control
simultaneously.
Turn the power supply of the
indoor unit on.
Fix the wiring correctly.
NO
Set the group No. correctly.
Fix the wiring correctly.
Connect the connector
correctly.
(VF079)