LG GR-B277, Service Manual

Page: 25 / 134

2-14. Sequential operation of components
Electromechanical parts of the appliance, such as the compressor, defrost heater, freezer fan, cooling fan, and damper
motor, are operated sequentially as shown in the chart below to prevent noise and circuit overload from everything starting
at once.
MICOM FUNCTION
- 25 -
Function Load Operation Sequence Remark
In
applying
Initial
p
ower
TEST
MODE
When temperature
of a defrost sensor
becomes more
than 45°C
(initial setup,
movement)
If error occurs
during operation,
initial operation is
not done.
Sequence of load
operation when
closing freezer
and refrigerator.
The refrigerator
will return to
normal operation
if you press the
test switch once
again while in
Test Mode 2 or if
the temperature
of the defrost
sensor surpasses
41°F (5°C). The
compressor will
run after the 7-
minute delay.
When
temperature of a
defrost sensor
becomes less
than 45°C
(power failure,
service)
Test mode 1
(Compulsory
function)
Test mode 2
(Compulsory
defrost)
POWER
ON
COMP
ON
F-FAN
&
C-FAN
ON
R-STEP
MOTOR
DAMPER
ON
OPTICHILL
STEP
DAMPER
MOTOR
ON
DEFROST
HEATER
OFF
DEFROST
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.