LG A2UC146FA0 Service Manual page 51

4. When Heating does not operate
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 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).
• The details of check are as followings
• Comp Relay.
Check point
Between two pin
of DC part in relay
for COMP.
Turn ON Main Power
)" by setting the desired temperature of the
Check the connector of intake and pipe sensor(thermistors)
Check the DC voltage on the PWB ASS'Y
Comp ON Comp OFF
About DC
Below DC 1V
12V
Check Outdoor Unit
Electronic Parts Troubleshooting Guide
• 4-Way Relay
Check point 4-Way ON
Between two pin
Below DC 1V
of DC part in relay
for 4-way.
4-Way OFF
About DC 12V
Service Manual 55