LG Single A Svc Manual page 66

6.3 The Compressor/Outdoor Fan are don't operate
Operate Cooling Mode by setting the disired temperature of the remote controller is less
than one of the Indoor temperature by 1°C at least.
Check the sensor for Indoor temperature is attatched as close as to be effected by the
themperature of Heat Exchange (EVA.)
When the sensor circuit for Indoor temperature and connector are in bad connection or are
not engaged, Compressor/Outdoor fan is stopped.
• Check the related circuit of R02H(12.1K), R01H(1K), R04H(6.2K), R03H(1K), C01H(102),
C02H(102), Micom(pin No.
• Check the Indoor temperature sensor is disconnected or not (about 10K at 25°C).
Check the Relay(RY-PWR, RY-START) for driving Compressor.
• Check the voltage between brown and blue cable of terminal to connect the Outdoor
(About AC220V / 240V).
• Check the related circuit of relay in Outdoor PCB Ass'y.
Check Point
Between Micom(No. 19) and
GND
Between IC01M(No. 10) and
GND
Check the electrical wiring diagram of Outdoor side.
Check the open or short of connecting wires between Indoor and Outdoor.
Be sure to disconnect the power cable plug from the plug socket before disassembling the
equipment for a repair. Internal components and circuit boards are at main potential when the
equipment is connected to the power cables. This voltage is extremely dangerous and may
cause death or severe injury if come in contact with it.
Be sure to turn off power switch before connect or disconnect connector, or parts damage may
be occurred.
Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Turn on the main power.
When in air circulation mode, compressor/outdoor fan is stopped.
, ).
Turn off main power.
Comp. ON
DC 5V
DC 1V↓
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5. Trouble Shooting
Comp. OFF
DC 0V
DC 12V
LGE Internal Use Only