Frost Removal Function; Sequential Operation Of Built-In Product; Load Operation Sequence - LG GC-P207 Service Manual

MICOM FUNCTION

2-10. 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).

2-11. 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
POWER
more than 45°C
(In purchase,
movement)
When
temperature of a
frost removal POWER
sensor becomes
less than 45°C
(In power failure,
service)
5.6
sec.
Test mode 1
(Compulsory TEST
function)
(Press
Once)
Test mode 2
TEST
(Compulsory frost
removal)
(Press
2 times)

Load Operation Sequence

0.5 0.3
COMP
sec. sec.
ON ON
0.5 8
FROST
sec. sec.
REMOVAL
HEATER
ON
ON
WATER
5
SUPPLY
sec.
&
DISPENSE
HEATER
ON
0.3
OTHER
sec.
S/W
LOAD
OFF
0.3
COMP
sec.
S/W
OFF
0.3 0.3
STEP
F-FAN
sec. sec.
MOTOR
&
C-FAN
DAMPER
ON
ON
HOME
0.3 5
FROST
BAR/
sec. sec.
REMOVAL
PIPE
HEATER
HEATER
OFF
ON
0.3
COMP
sec.
ON
0.3 0.3
F-FAN
COMP
sec. sec.
&
C-FAN
ON
ON
0.3 FROST 0.3
F-FAN
sec. sec.
REMOVAL
&
C-FAN HEATER
OFF
ON
- 26 -
Remark
If error occurs
during operation,
HOME
initial operation is
BAR
not done.
HEATER
ON
HOME
BAR/
PIPE
HEATER
OFF
F-FAN
&
C-FAN
ON
If pressing switch
once more in the
STEP
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).