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.
(V2833)
Is transmission
wiring disconnected
or wired incorrectly?
The PC board of one of the
optional controllers for centralized
control is defective. Try turning
on/off using each optional
controllers for centralized control,
and replace the PC board of the
one that is unable to control the
indoor unit.
NO
NO
Fix the wiring correctly.
YES
YES
Has a once
connected optional
controller for
centralized control
been disconnected
or its address
changed?
Turn on power supply for all
optional controllers for centralized
control.
Reset power supply simultaneously
for all optional controllers for
centralized control.
YES
NO
Is the power
supply turned on
for all optional
controllers for
centralized
control?
Set reset switch to "normal."
YES
NO
Is the reset switch
of all optional
controllers for
centralized control
set to ''normal?''