When Heating Does Not Operate - LG ATNH126ELFC Service Manual

When Heating does not operate

Trouble 4
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 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
Below DC 1V
for COMP.
Turn ON Main Power
)" by setting the desired temperature of the
Check the DC voltage on the PWB ASS'Y
Comp ON Comp OFF
About DC
12V
Check Outdoor Unit
• 4-Way Relay
Check point 4-Way ON
Between two pin
of DC part in relay Below DC 1V
for 4-way.
Troubleshooting Guide
4-Way OFF
About DC 12V
Service Manual 109