LG LSC27926, Service Manual, Page: 18 / 101

2-15. 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
- 18 -
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.
■
Sequence of
load operation
when closing
F-room and
R-room.
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
F-FAN
&
C-FAN
ON
R-STEP
MOTOR
DAMPER
ON
OPTICHILL
STEP
DAMPER
MOTOR
ON
FROST
REMOVAL
HEATER
OFF
FROST
REMOVAL
HEATER
ON
DAMPER
&
DUCT DOOR
& OPTICHILL
HEATER ON
DAMPER
&
DUCT DOOR
& OPTICHILL
HEATER OFF
0.3
sec.
6.0
sec.
0.3
sec.
0.3
sec.
0.3
sec.
POWER
ON
0.3
sec.
PIPE
&
DISP'
HEATER
OFF
0.3
sec.
COMP
ON
0.3
sec.
F-FAN
&
C-FAN
ON
0.3
sec.
R-STEP
MOTOR
DAMPER
ON
0.3
sec.
OPTICHILL
STEP
DAMPER
MOTOR
ON
PIPE
&
DISP'
HEATER
ON
TEST
SWITCH
(PRESS
Once)
OTHER
LOAD
OFF
COMP
ON
F-FAN
&
C-FAN
ON
R-STEP
MOTOR
DAMPER
ON
OPTICHILL
STEP
DAMPER
MOTOR
CLOSE
TEST
SWITCH
(PRESS
2 Times)
COMP
OFF
F-FAN
&
C-FAN
OFF
FROST
REMOVAL
HEATER
ON
R-STEP
MOTOR
DAMPER
CLOSE
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.