Service manual

7URXEOHVKRRWLQJ238QLILHG212))&RQWUROOHU 6L(1
 7URXEOHVKRRWLQJ
7URXEOHVKRRWLQJ
(V2841)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
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 control?
Is the group No. of
malfunctioning indoor
units set?
Is transmission with
all indoor units
malfunctioning?