LG LS-C186V L2 / LS-H186V L2 Service Manual ▷ View online
Service Manual 49
Troubleshooting Guide
• Confirm that the Vertical Louver is normally geared with the shaft of
Stepping Motor.
• If the regular torque is detected when rotating the Vertical Louver with
hands
Normal
• Check the connecting condition of CN-UD, LR1, LR2 Connector.
• Check the soldering condition(on PWB) of CN-UD LR1, LR2 Connector.
• Check the soldering condition(on PWB) of CN-UD LR1, LR2 Connector.
If there are no problems after above checks
• Confirm the assembly conditions that are catching and interfering parts
in the rotation radial of the Louvers.
5. When Louvers do not operate.
Check the operating circuit of the Vertical Louvers.
• Confirm that there is DC +12V between pin
(RED) of CN-UD and
GND.
• Confirm that there is a soldering short at following terminals.
- Micom : Between ~ , ~
- IC02 : Between
- IC02 : Between
~
,
~
- IC03 : Between
~
,
~
- Between
,
,
and
of CN-UD/LR1/LR2
46
49
59
62
50 Room Air Conditioner
Troubleshooting Guide
6. When Heating does not operate
Operate “Heating Mode( )” by setting the desired temperature of the
remote control is higher than one of the indoor temperature by 2°C at
least.
remote control is higher than one of the indoor temperature by 2°C at
least.
In heating Mode, the indoor fan operates in case the pipe temperature
is higher than 28°C.
is higher than 28°C.
Check the connector of intake and pipe sensor(thermistors)
• Check the related circuit of RY-4WAY
• Check the indoor room temperature is disconnected or not (about
• Check the indoor room temperature is disconnected or not (about
10K
Ω
/at 25°C).
• Check the indoor pipe temperature is disconnected or not (about
5K
Ω
/at 25°C).
Turn ON Main Power
Check the DC voltage on the PWB ASSEMBLY
• The details of check are as followings
Check point
Between Micom
(NO.63) and GND
Between IC02M
(NO.12) and GND
Comp ON
DC 5V
Below DC 1V
Comp OFF
DC 0V
About DC
12V
Check point
Between Micom
(NO.51) and GND
Between IC02M
(NO.10) and GND
4 way ON
DC 5V
Below DC 1V
4 way OFF
DC 0V
About DC
12V
Check point
Between Micom
(NO.53) and GND
Between IC04M
(NO.11) and GND
Fan ON
DC 5V
Below DC 1V
Fan OFF
DC 0V
About DC 12V
• Comp Relay.
• 4 way Relay
• Outdoor fan Relay
Service Manual 51
Turn off Main Power
• Check the electrical wiring diagram of outdoor side.
• Check the abnormal condition for the component of
• Check the abnormal condition for the component of
Compressor/Outdoor Fan Motor, 4 way.
• Check the "open" or "short" of connecting wires between indoor and
outdoor.
Troubleshooting Guide
52 Room Air Conditioner
Schematic Diagram
Schematic Diagram
Electronic Control Dvice
(1) Heat Pump/Cooling Only Series(Indoor Unit)
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