LG GC-B207, Service Manual

Page: 26 / 145

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.
MICOM FUNCTION
- 26 -
Function Load Operation Sequence Remark
In
applying
Initial
p
ower
TEST
MODE
When temperature
of a frost removal
sensor becomes
more than 45°C
(In purchase,
movement)
If error occurs
during operation,
initial operation is
not done.
If pressing switch
once more in the
test mode 2 or
temperature of a
frost removal
sensor is more
than 5°C, it
immediately
returns to the test
mode for initial
operation
(COMP operates
after 7 minutes).
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)
POWER
ON
COMP
ON
COMP
ON
F-FAN
&
C-FAN
ON
F-FAN
&
C-FAN
ON
F-FAN
&
C-FAN
ON
F-FAN
&
C-FAN
OFF
STEP
MOTOR
DAMPER
ON
STEP
MOTOR
DAMPER
OPEN
STEP
MOTOR
DAMPER
CLOSE
HOME
BAR
HEATER
ON
POWER
ON
FROST
REMOVAL
HEATER
ON
HOME
BAR/
PIPE
HEATER
OFF
HOME
BAR/
PIPE
HEATER
ON
TEST
S/W
(Press
Once)
COMP
ON
TEST
S/W
(Press
2 times)
COMP
OFF
0.5
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.5
sec.
8
sec.
0.3
sec.
5
sec.
FROST
REMOVAL
HEATER
OFF
FROST
REMOVAL
HEATER
ON
WATER
SUPPLY
&
DISPENSE
HEATER
ON
5
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
5.6
sec.
OTHER
LOAD
OFF