LG L2-C362LL0 Service Manual page 44

Electronic Parts Troubleshooting Guide
6. When Heating does not operate
• The details of check are as followings
• Comp Relay.
Check point
Between two pin
of DC part in relay
for COMP.
44 Multi Air Conditioner
Operate "Heating Mode(
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.
Check the connector of intake and pipe sensor(thermistors)
• Check the related circuit of R02H(12.1K), R01H(1.0K), R04H(6.2K),
R03H(1.0K).
• Check the indoor room temperature is disconnected or not (about
10KΩ/at 25°C).
• Check the indoor pipe temperature is disconnected or not (about
5KΩ/at 25°C).
Check the DC voltage on the PWB ASS'Y
Comp ON Comp OFF
About DC
Below DC 1V
12V
Turn ON Main Power
)" by setting the desired temperature of the
• 4-Way Relay
Check point
Between two pin
of DC part in relay
for 4-way.
Check Outdoor Unit
4-Way ON 4-Way OFF
Below DC 1V About DC 12V