Service manual

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Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
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?
(V2829)