Daikin FXYBP20K7V1, Service Manual

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SiE 00-07 Troubleshooting (OP: Unified ON/OFF Controller)
Troubleshooting R-407C PLUS Series 175
8. Troubleshooting (OP: Unified ON/OFF Controller)
8.1 Operation Lamp Blinks
Remote Controller
Display
Operation lamp blinks
Suppposed Causes 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
Troubleshooting
(VF079)
Is
the power supply for
the indoor unit displaying a
malfunction
turned on?
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 for all optional
controllers for centralized control
simultaneously.
NO
YES
NO
YES
YES
NO
YES
Turn the power supply of the
indoor unit on.
YES
NO
NO
YES
NO
YES
NO
Has a once
connected indoor unit been
removed or its address
changed?
Diagnose the cause with the air
conditioner's failure diagnosis
manual.
NO
YES Is a malfunction
code displayed on the remote
controller?
Is the group
No. of malfunctioning indoor
units set?
Is transmission
with all indoor units
malfunctioning?