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Trouble
Is the power
applied to the unit?
Check power supply mains or
interconnection wires
Is the power normal? check
the voltage between L&N of
terminal block
Check the wiring of indoor and
outdoor
Press the power ON/OFF button
of wire control or remote control
Y E S
Y E S
N O
N O
Does the beeper
b eep ?
Is the display all
o ff?
Check the connector on display
PCB connected to control PCB
Check the display PCB itself
Is the unit display
normal?
Does outdoor unit run ?
Does the
compressor run
normally?
Check the failure code
according to the failure
table
Normal
Check the
compressor ,wires
and it
’
s
capacitor.
Y E S
Y E S
Y E S
Y E S
Y E S
Y E S
N O
N O
N O
Does the control
o k ?
Does the control
PCB ok?
Control failure
Control PCB failure
N O
N O
Y E S
N O
Trouble shooting
Trouble shooting
Trouble shooting
Trouble shooting
N O
Does the indoor
unit run?
