Sequential Operation Of Built-In Product; Load Operation Sequence - LG LSC26945TT Service Manual

MICOM FUNCTION

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.
Function
When temperature
of a frost removal
POWER
sensor becomes
more than 45°C
(In purchase,
movement)
When
temperature of a
POWER
frost removal
sensor becomes
less than 45°C
(In power failure,
service)
0.3
sec.
Test mode 1
TEST
(Compulsory
SWITCH
function)
(PRESS
Once)
Test mode 2
TEST
(Compulsory 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
COMP
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
R-STEP
COMP
sec. sec.
&
MOTOR
C-FAN
DAMPER
ON
ON
R-STEP
F-FAN
0.3 0.3
sec. & sec. MOTOR
DAMPER
C-FAN
ON
ON
0.3
FROST
F-FAN
sec.
REMOVAL
&
HEATER
C-FAN
ON
OFF
- 19 -
Remark
If error occurs
OPTICHILL
during operation,
0.3
STEP
initial operation is
sec.
DAMPER
not done.
MOTOR
ON
I
Sequence of
DAMPER
0.3
load operation
&
sec.
when closing
DUCT DOOR
& OPTICHILL
F-room and
HEATER OFF
R-room.
OPTICHILL
0.3
STEP
sec.
DAMPER
MOTOR
ON
ON
If pressing switch
OPTICHILL
once more in the
0.3
STEP
test mode 2 or
sec.
DAMPER
temperature of a
MOTOR
ON
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
(COMP operates
CLOSE
after 7 minutes).