LG SxS GR-P247 Service Manual page 29

MICOM FUNCTION
2-13. Frost removal function
1. Frost removal is performed whenever total operation time of compressor becomes 7 ~ 7.5 hour.
2. In providing initial power (or returning power failure), frost removal starts whenever total operation time of compressor
becomes 4 ~ 4.5 hour.
3. Frost removal is completed if temperature of a frost removal sensor becomes more than 5°C after starting frost removal.
Poor frost removal is not displaced if it does not arrive at 5°C even if two hours have passed after starting frost removal.
4. No removal is done if frost removal sensor becomes poor (snapping or short-circuit).
2-14. Sequential operation of built-in product
Built-in products such as compressor, frost removal heater, freezing room fan, Cooling Fan and step motor damper are
sequentially operated as follows for preventing noise and part damage occurred due to simultaneous operation of a lot of
parts in applying initial power and completing test.
Function
When temperature
of a frost removal
sensor becomes
more than 45°C
(In purchase,
movement)
When
temperature of a
frost removal
sensor becomes
less than 45°C
(In power failure,
service)
Test mode 1
(Compulsory
function)
Test mode 2
(Compulsory frost
removal)
Load Operation Sequence
0.5 0.3
POWER COMP
sec. sec.
ON ON
0.5 8
FROST
POWER
sec. sec.
REMOVAL
HEATER
ON
ON
WATER
5.6 5
SUPPLY
sec. sec.
&
DISPENSE
HEATER
ON
0.3
TEST
OTHER
sec.
S/W
LOAD
(Press
OFF
Once)
TEST 0.3
COMP
sec.
S/W
(Press
OFF
2 times)
0.3 0.3
STEP
F-FAN
sec. sec.
MOTOR
&
C-FAN DAMPER
ON
ON
0.3
HOME
FROST
sec. sec.
BAR
REMOVAL
HEATER
HEATER
ON
OFF
0.3
COMP
sec.
ON
0.3 0.3
F-FAN
COMP
sec. sec.
&
C-FAN
ON
ON
0.3 0.3
FROST
F-FAN
sec. sec.
REMOVAL
&
C-FAN HEATER
OFF
ON
- 29 -
Remark
If error occurs
during operation,
HOME
initial operation is
BAR
not done.
HEATER
ON
5
HOME
BAR
HEATER
OFF
F-FAN
&
C-FAN
ON
If pressing switch
STEP once more in the
MOTOR
test mode 2 or
DAMPER
temperature of a
OPEN
frost removal
sensor is more
than 5°C, it
immediately
returns to the test
STEP
mode for initial
MOTOR
operation
DAMPER
CLOSE
(COMP operates
after 7 minutes).