Daewoo DSB-070LH Service Manual page 54

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
unit
YES
Is the
power normal?
check the voltage between
L & N of terminal
block
NO
YES
press the power ON/OFF
button on remote controller
YES
NO
Does the
Normal
beeper beep two
times?
check the YES
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
NO
Check the wiring of indoor
Is the
switch position
on switch pannel at
"Remote"
YES
NO
Does
control PCB
status LED repeat one
NO
second "on and
off"?
• control PCB fault
• Micom or reset
YES
IC fault
• Check the remote signal receiver
• Check the connection between signal
receiver and control PCB
Place the switch
NO position to the
"Remote" and then
Check it once
more