LG LS-H126P / AS-H126P / LS-C126P / LS-H096P / AS-H096P_ARTCOOL Service Manual ▷ View online
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3. Compressor/Outdoor Fan are unable to drive.
Turn on Main Power
Operate "Cooling Mode( )" by setting the desired temperature of the
remote controller is less than one of the indoor temperature by 1°C at least.
remote controller is less than one of the indoor temperature by 1°C at least.
When in Air Circulation Mode, Compressor/Outdoor Fan is stopped.
Check the sensor for indoor temperature is attached as close as to be
effected by the temperature of Heat Exchanger(EVA).
effected by the temperature of Heat Exchanger(EVA).
When the sensor circuit for indoor temperature and connector are in bad
connection or are not engaged, Compressor/Outdoor Fan is stopped.
connection or are not engaged, Compressor/Outdoor Fan is stopped.
• Check R02H(12.1k
Ω), R04H(6.2kΩ), Micom Pin
26
,
27
• Check the indoor temperature sensor is disconnected or not(About 10k
Ω / at 25°C).
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.
• Check the "open" or "short" of conmecting wires between indoor and
outdoor.
Check Relay(RY - COMP) for driving compressor.
• When the power(About AC220V/240V) is applied to the connecting wire
terminal support transferred to compressor, PWB Assembly is normal.
• Check the circuit related to the relay.
Check point
COMP ON
COMP OFF
Between Micom(No.
DC5V
DC0V
63) and GND
Between IC02M(No. 12)
Below DC 1V
About DC12V
and GND
(app)
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Fan couln't operate for dehumidifying mode.
- Change operation for cooling mode.
* Don't insert the connector wire at CN-Motor 1, 2 when its main power turn on.
Turn off Main power
Check the connection of CN-MOTOR1, 2
Check the Fan Motor (Motor resistance) (fig 1)
Check the Fuse(AC250V/3.15A)
Turn ON Main Power
- Check the soldering on AC PWB Assembly (6811A10096)/DC PWB (6871A10097).
- AC PWB Assembly : check the connection CN-AC/DC
- AC PWB Assembly : check the connection CN-AC/DC
,
and
,
- DC PWB Assembly : check the connection CN-AC/DC
,
and
,
4. When indoor Fan does not operate.
1
2
3
4
5
6
7
- If the Test result isn't the same
as the table, ti is motor
trouble.
trouble.
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• 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
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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
4 way ON
DC 5V
4 way OFF
DC 0V
Check point
Between Micom
(NO.53) and GND
Between IC03M
(NO.14) and GND
Fan ON
DC 5V
Below DC 1V
Fan OFF
DC 0V
About DC 12V
• Comp Relay.
• 4 way Relay
• Outdoor fan Relay
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