Samsung RS2544 Manuel D’Utilisation

43

2-1) CoolSelect Zone

TM

Drawer is controlled by a damper to supply or block cold air. For Quick Cool, the damper will be

close. So cold air is supplied only to CoolSelect Zone

TM

Drawer. For Thaw, the evaporator heater of refrigerator is

ON and the damper is controlled by the refrigerator temperature.

2-2) The stepping motor controlled by a Driver IC TA7774P(IC7) operates the damper. The stepping motor uses 4

combined signals to open and close the damper.

Note) To prevent the malfunction from a high humidity, a DC 12V, 1 watt heater is mounted and activated continuously.

1) Motor drive circuit

1-1) This refrigerator adopts a BLDC motor froeduce energy consumption, Motors of the freezer, refrigerator and the

machine compartment are composed of the BLDC.  For RS2533, R-fan is operated by AC  115V Motor.

1-2) Voltages between high-speed and low-speed

Note) Under the conditions, the fans will be operated in 2 options, such as High and Low mode. Generally, it is

operated in the High mode during a day time and in the Low mode at night.

Voltage of motor

High

Low

Measure b (F-FAN)

11.1V

10V

Measure C (R-FAN)

10V

10V

Measure d(C-FAN)

10V

8.3V

In the normal operation, MICOM No. 40, 41 and 42 applies a constant frequency; and
MICOM defects the signal to check the failure of motor.
(frequency(Hz)

×

12 = motor rpm)

Remark