Daikin VRVIII-S, Service Manual

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SiENBE34-703 Troubleshooting by Indication on the Centralized remote control
Troubleshooting 181
4. Troubleshooting by Indication on the Centralized
remote control
4.1 “
UE
” Malfunction of Transmission between Centralized
remote control and Indoor Unit
remote control
Display
UE
Applicable
Models
AII indoor unit models
Centralized remote control
Method of
Malfunction
Detection
Microcomputer checks if transmission between indoor unit and central remote control is normal.
Malfunction
Decision
Conditions
When transmission is not carried out normally for a certain amount of time
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 control
! Defect of indoor unit PC board
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Caution
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.
Turn indoor unit's power
supply.
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?
(V2832)
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO