LG LSC27990TT Service Manual page 17

MICOM FUNCTION
2-14. Sequential operation of components
Component 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 many
parts in applying initial power and completing test.
Function
When temperature
of a frost removal
POWER
sensor becomes
more than 45°C
(At purchase,
shipping)
When
temperature of a
POWER
frost removal
sensor becomes
less than 45°C
(In power failure,
service)
0.3
sec.
Test mode 1
TEST
(Manual function)
SWITCH
(PRESS
Once)
Test mode 2
TEST
(Manual frost
SWITCH
removal)
(PRESS
2 Times)
Load Operation Sequence
0.3 0.3
COMP
sec. sec.
ON ON
FROST
0.3 0.3
REMOVAL
sec. sec.
HEATER
ON
ON
PIPE PIPE
0.3 0.3
& &
sec. sec.
DISP' DISP'
HEATER HEATER
ON OFF
OTHER 0.3
sec.
LOAD
OFF
0.3
COMP
sec.
OFF
F-FAN R-STEP
0.3
& MOTOR
sec.
C-FAN DAMPER
ON ON
FROST
DAMPER
6.0
REMOVAL
&
sec.
HEATER
DUCT DOOR
& OPTICHILL
OFF
HEATER ON
0.3 0.3
F-FAN
COMP
sec. sec.
&
C-FAN
ON
ON
F-FAN
0.3 0.3
COMP
sec. sec.
&
C-FAN
ON
ON
0.3
FROST
F-FAN
sec.
REMOVAL
&
HEATER
C-FAN
ON
OFF
- 17 -
If error occurs
OPTICHILL
during operation,
0.3
STEP
initial operation is
sec.
DAMPER
not done.
MOTOR
ON
I
DAMPER
0.3
&
sec.
DUCT DOOR
& OPTICHILL
HEATER OFF
OPTICHILL
0.3
R-STEP
sec. STEP
MOTOR
DAMPER
DAMPER
MOTOR
ON
ON
If you press the
OPTICHILL
switch in the
R-STEP
0.3
STEP
again test mode 2
MOTOR sec.
DAMPER
DAMPER
or temperature of
MOTOR
ON
a frost removal
CLOSE
sensor is more
than 5°C, it
immediately
returns to the test
0.3
R-STEP
mode for initial
sec.
MOTOR
operation
DAMPER
(COMPRESSOR
CLOSE
operates after 7
minutes).
Remark
Sequence of
load operation
when closing
FREEZER and
REFRIGER-
ATOR.