第 58 页 共 59 页
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
YE S
YE S
NO
NO
Does the beeper
beep?
Is the display all
off?
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
normal ly?
Check the failure code
according to the failure
table
No rmal
Check the
compressor ,wires
and it’s
capacitor.
YE S
YE S
YE S
YE S
YE S
YE S
NO
NO
NO
Does the control
ok?
Does the control
PCB ok?
Control failure
Control PCB failure
NO
NO
YE S
NO
Trouble shooting
NO
Does the indoor
unit run?
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