LG LB-E608HL - Defrost and Self-Diagnosis; Defrost Control Logic; Self-Diagnosis Function

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6. Defrost Control
• Defrost operation is controlled by timer and sensing the outdoor piping temperature.
• The defrost starts only when the outdoor pipe temperature falls below -6°C after 45 minutes passed from starting
of heating operation.
• Defrost ends after 9 minutes 30 seconds passed from starting of defrost operation or when the outdoor pipe
temperature rises over 12°C even if before 12 minutes.
More than 45 minutes of
heating operation
More than 10 min.
running of compressor
Outdoor Pipe Temp.
Indoor Fan
Compressor
4-Way Valve
ON
ON
ON
ON
OFF
ON
OFF
HOT-
START
ON
ON OFF OFFON
Within
12minutes
Defrost
Defrost
More than 45 minutes of
heating operation
More than 10 min.
running of compressor
7. Self-Diagnosis Function
• 'CHECK' will flash 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 Accident Point
F1 Indoor temperature thermistor error
F2 Indoor piping thermistor error
F3 Indoor unit & remote controller