Defrost Control - LG LB-H1860RH Service Manual

6. Defrost Control

• Defrost control is available 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 flash in the remote controller display when a problem occurs. Then please contact your dealer.
• Correct the 'FAULT MESSAGES' 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
C H 0 1
CH 02
CH 03
CH 04(Optional)
More than 45 minutes
of heating operation
ON
ON
FAULT MESSAGES
Indoor room temperature thermistor error
Indoor piping thermistor error
Indoor main body / Remote controller unit communication error
Water level float switch error
–23–
Within
More than 45 minutes
9min. 45sec.
of heating operation
More than 10 min.
running of compressor
HOT-
START
OFF
ON
OFF
ON
ON