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Is the
unit display
normal?
YES
NO
Outdoor unit does
not run?(note. 1)
YES
Does
the compressor run
normally?
YES
Indoor unit does
not run(note 1)
Is the unit
YES
display
mormal?
Check the failure
NO
code according to
the self diagnostic
(note 2)
YES
check the failure
code according to
the self-diagonostic
(note 2)
Trouble
Is the power
applied to the
YES
Is the
power normal?
check the voltage between
L & N of terminal
NO
YES
press the power ON/OFF
button on remote controller
YES
NO
Does the
Normal
beeper beep two
times?
YES
check the
connecting
point of
magnetic
NO
Is the display
contactor
all off?
YES
• Check the connector on display
PCB connected to control PCB
• Check the display PCB itself
NO
Check power supply mains
or interconnection wires
unit
NO
Check the wiring of indoor
block
NO
status LED repeat one
NO
• control PCB fault
• Micom or reset
IC fault
• Check the remote signal receiver
• Check the connection between signal
receiver and control PCB
Does
control PCB
second "on and
off"?
YES
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