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 Load Operation Sequence Remark
When temperature
of a frost removal
sensor becomes
more than45°C
(At purchase,
shipping)
When
_ temperature of a
frost removal
sensor becomes
_=.: less than 45°C
(In power failure,
-a
service)
(1:)
Testmode 1
(Manual function)
.-I
n3
03
'--I
0 Testmode2
m
(Manual frost
removal)
POWER 0.3
sec.
ON
COMP
ON
0.3 F-FAN
sec. &
---*- C-FAN
ON
0.3 R-STEP
sec. MOTOR
DAMPER
ON
OPTICMILL
0.3 STEP
sec.
-_ DAMPER
MOTOR
ON
0.3 FROST 0.3 FROST
POWER sec. REMOVAL sec. REMOVAL
HEATER_ HEATER
ON
ON OFF
6.0
sec.
DAMPER 0.3 DAMPER
& sec. &
) DUCT DOOR -_ DUCT DOOR --
&OPTICHILL &OPTICHILL
HEATER ON HEATER OFF
0.3 PIPE 0.3 PIPE 0.3 0.3 F-FAN O.3 O.30PTICHILL
• c & sec. & sec. COMP sec. sec. R-STEP sec. STEP
-_ DISP' ---_ DISP' ---*- _ & -_ MOTOR ---_ DAMPER
HEATER HEATER ON C-FAN DAMPER MOTOR
ON OFF ON ON ON
TEST
SWITCH
(PRESS -_
Onc_
OPTICHILL
OTHER 0.3 COMP 0.3 F-FAN 0.3 R-STEP 0.3 STEP
LOAD sec. sec. & sec. MOTOR sec. DAMPER
---_ _ C-FAN ---_ DAMPER ---_ MOTOR
OFF ON ON ON CLOSE
TEST COMP
SWITCH
(PRESS -_ OFF
2Times)
0.3 F-FAN 0.3 FROST 0.3 R-STEP
sec. & sec. REMOVAL sec. MOTOR
--_ C-FAN --_ HEATER-_ DAMPER
OFF ON CLOSE
If error occurs
during operation,
initial operation is
not done.
• Sequence of
load operation
when closing
FREEZER and
REFRIGER-
ATOR.
If you press the
switch in the
again 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
(COMPRESSOR
operates after 7
minutes).
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