Defrost Control - LG LBNG3061YL Service Manual

6. Defrost Control

• Defrost control is availavle 45 minutes later since heating mode operation started, and it will not prolong over
10 minutes.
• Defrost control is carried out when the outdoor pipe temp. falls below -6°C for more than 3 minutes after 45
minutes passed from starting of heating operation.
• Defrost ends after 10 minutes passed from starting of defrost operation or when the outdoor pipe temp. rises
over 12°C after 5 minutes passed from starting of defrost.
The outdoor
piping Temp.
12°C OFF
-6°C ON
INDOOR FAN
COMPRESSOR
4-WAY VALVE
7. Self-diagnosis Function
• 'CHECK' will display in the remote controller display when a problem occurs. Then please contact your dealer.
• Correct the accident point as shown in the table below before restarting operation.
• During the normal operation 'CHECK' won't be displayed in the remote controller.
Remote controller LCD
CH 01
CH 02
CH 03
CH 04(Optional)
CH 05
CH 08
CH 09
CH 10
CH 11
CH 14
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
More than 45 minutes
of heating operation
ON
ON
ON
Accident Point
Indoor room or piping temperature thermistor error
Outdoor air or piping temperature thermistor error
Indoor main body / Remote controller unit communication error
Water level float switch error
Indoor and outdoor communication line error
CT error
DC peak error
DC Low voltage error
High pressure switch or instantaneous power failure
Discharge pipe temperature overheating
- 12 -
Within
More than 45 minutes
9min. 45sec.
of heating operation
More than 10 min.
running of compressor
HOT-
START
5sec.
OFF
OFF
ON
OFF ON
ON
ON
LGE Internal Use Only