Samsung SH12VCD Service Manual page 23

5-3 Sequence of trouble shooting for inverter aircon
OPERATION START
• The indoor unit does not work even
though the power is plugged.
•There is no sound "DING"
•The lamp is not on the display.
The indoor unit does not work when
operated by the remocon.
The lamp of the indoor display is flick-
ering and the indoor unit stops several
minutes after the indoor unit starts.
Timer lamp( ) flickering
Standard( ), Timer(
Nature( ) lamp flickering
Timer( ), Nature(
Standard( ), Nature (
POWER( ) flickering
Timer( ), POWER(
flickering
Nature( ), POWER lamp(
flickering
5-4
Check the control board and the display board
of indoor unit.(5-3-2)
Check the error mode by confirming the lamp
flickering of indoor unit display.
→ Check of the indoor temperature sensor (5-3-3)
→ Check of the indoor heat exchanger (5-3-3)
) lamp flickering
→ Check of indoor unit fan motor (5-3-4)
→ Check the lines of the indoor and outdoor
) lamp flickering
communication (5-3-5)
) lamp flickering → Check of the outdoor unit temperature sensor
: Discharge temperature sensor (5-3-6)
: Comp top OLP temperature sensor (5-3-6)
: Deice temperature sensor (5-3-7)
: Outdoor temperature sensor (5-3-7)
→ Check of the abnormal increase protection
of the operation Current (5-3-8)
→ Check of the instantaneous over-current protection
) lamp
mode of IPM circuit (5-3-9)
→ Check the abnormal increase of the comp
)
discharge gas temperature and OLP protection
mode.(5-3-10)
Check the indoor unit control board. (5-3-1)
Checking the Remocon. (5-3-2)
Check the indoor unit
Check of the
Communication line
Check of the Outdoor unit
Samsung Electronics