LG LS-E0960CL Service Manual page 18

9. Deice Control
Deicing operation is controlled by timer and sensing the indoor pipe temperature.
Deicing operation checks the indoor pipe temperature and Intake-air temperature at 25 minutes and 60 minutes
on starting of heating operation, and discriminates by temperature difference.
When the heating operation passed 25 minutes, the temperature ( T1=TE1–TR1) is checked and memorized
with checking the indoor pipe temperture (TE1) and the indoor Intake-air temperature (TR1).
When the heating operation passed 60 minutes, deicing operation checks the indoor pipe temperature (TE2)
and the indoor Intake-air temperature (TR2), and checks indoor pipe temperature(TE2), the temperature
difference ( T2=TE2–TR2) and the temperature difference
If temperature of indoor pipe is below 32°C Deicing function operates at the priority I condition.
If temperature of indoor pipe is over 32°C Deicing function operates at the priority II condition.
If the temperature difference ( Td) become more than the option temperature, deicing operation starts.
At that time, deicing operation time is decided.
The deicing operation time starts after deicing operation started.
If deicing operation start, above heating operation time is reset, so if deicing operation is finished, the heating
operation time is recounted.
The deicinig time and the operation diagram are as following.
TEMP C
Pipe Temp.
Intake Air
Temp.
COMPRESSOR
4-WAY VALVE
OUTDOOR FAN
INDOOR FAN
DEICE LED
Priority I
TE2
Deicing Time
Priority II
T1- T2 Td
Deicing Time
60 minutes
25 mins
TE1
T1
Heating
ON
ON(Heating Operation)
ON
ON
OFF
(DEICING DIAGRAM)
Below 30°C
12mins
Over 6°C 5~6°C
10mins 9mins
Td(= T1– T2) of
TE2
T2
T2
Deicing
ON
OFF
OFF
30~31°C
11mins
4~5°C
8mins
-18-
T1, T2.
25 mins
Hot
Start
ON
ON
ON
OFF
ON
31~32°C
10mins Heating Operation
3~4°C
7mins
T1
Heating
ON
ON
ON
ON
OFF
Over 32°C
below 2.0°C
Heating Operation