Circuit Of Micom; Defrost Cycle; Electrical Parts Operation In Sequence; Function - LG LTCS24223B /04 Service Manual

9. CIRCUIT OF MICOM

9-1 FUNCTION

9-1-1 Function
1. When Appliance is plugged in for first time, is set "middle" for the refrigerator. You can adjust the refrigerator control
temperature by pressing the Temperature Adjust button.
2. When the power is initially applied or restored a power failure, it is set at the last control temperature selected before the
power initially applied or restored a power failure.

9-1-2 Defrost Cycle

Defrosting starts each time the accumulated COMPRESSOR running time is between 7 and 50 hours. This time is
determinate by how long the doors are opened.
For initial power on or for restoring power, defrosting starts when the compressor running time reaches 4 hours.
Defrosting stops if the sensor temperature reaches 50 °F (10 °C) or more. If the sensor doesn't reach the 50 °F (10°C) in 1
hour, the defrost mode is malfunctioning. (Refer to the defect diagnosis function).
Defrosting won't function if the sensor if defective (wires are cut or short circuited)

9-1-3 Electrical Parts Operation in Sequence.

Electrical parts such as COMP, defrost heater, freezer FAN, etc. Operate in the following order to prevent noise and parts
damage. Several parts are started at the same time at initial power on and are turned off together when TEST is completed.
OPERATING
Temperature of defrost Temperature of defrost
sensor is 113°F (45°C) sensor is 113°F (45°C)
or or more .
Temperature of defrost Temperature of defrost
sensor is lower than sensor is lower than
113°F (45°C . 113°F (45°C)
Temp OFF
Control Mode
TEMP(°C)
R
O R D E R
0.5 0.5
POWER POWER
Sec Se
ON ON
c
0.5 0.5
Def- Def-
POWER POWER
Sec Sec
Heater Heater
ON ON
ON ON
COMP, COMP,
0.5 Sec 0.5 Sec
F-FAN F-FAN
ON ON
Medium/
Low Medium
Low
R E F I R G E R
- 31 -
COMP, COMP,
F-FAN F-FAN
ON ON
Def- Def-
Heater Heater
10 Sec 10 Sec
OFF OFF
( ON :
Medium/
High
High
A T O R
R E M A R K S
/ OFF : )