LG AS-C186TLB1 / AS-C186TLM1 / AS-C186TMA1 / AS-C186TNA1 / AS-C246TLB0 / AS-C246TLM0 / AS-C246TMA0 / AS-C246TNA0 / AS-H146TLM0 / AS-H186TLB0 / AS-H186TLM0 / AS-H186TMA0 / AS-H186TNA0 / AS-H246TLB0 / AS-H246TLM0 / AS-H246TMA0 / AS-H246TNA0 Service Manual ▷ View online
Service Manual 61
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-U/D Connector
• Check the soldering condition(on PWB) of CN-U/D Connector
• Check the soldering condition(on PWB) of CN-U/D 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 Vertical Louver
When Vertical Louver does not operate.
Check the operating circuit of the Vertical Louver
• Confirm that there is DC +12V between pin
(RED) of CN-U/D and
GND.
• Confirm that there is a soldering short at following terminals.
- Between
,
,
and
of MICOM
- Between
,
,
and
of IC01M
- Between
,
,
and
of IC01M
60
61
62
63
62 Room Air Conditioner
Troubleshooting Guide
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.59) and GND
Between IC01M
(NO.11) 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.11) 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 IC02M
(NO.12) 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 63
Troubleshooting Guide
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.
64 Room Air Conditioner
Exploded View
Exploded View
346810
35211B
135516
352150
267110
146811
145201
131410
135511
359011
342800
159901-1
159901-2
268712
159830
135311
135312
733010
152313
135314
152302
354210
145200
266090
268714-1
268714-2
W6640
W0CZZ
263230
264110
249951
Indoor Unit
Click on the first or last page to see other AS-C186TLB1 / AS-C186TLM1 / AS-C186TMA1 / AS-C186TNA1 / AS-C246TLB0 / AS-C246TLM0 / AS-C246TMA0 / AS-C246TNA0 / AS-H146TLM0 / AS-H186TLB0 / AS-H186TLM0 / AS-H186TMA0 / AS-H186TNA0 / AS-H246TLB0 / AS-H246TLM0 / AS-H246TMA0 / AS-H246TNA0 service manuals if exist.