Reference No. 5) Check method of DOOR S/W
Perform the check when the power is supplied.
DOOR S/W is consisted of 2 contacts
circuit. 1 contact senses DOOR OPEN/
CLOSE at PCB by DC 5V and another has a
role of ON/OFF of the inside lamp.
(Lamp Inside the Refrigerator)
1. Since there is a fluorescent lamp in the Refrigerator, at first, open the door of the Refrigerator
to check whether the lamp is normally on. If normally on, check whether the lamp is normally
off by pushing DOOR S/W while R-DOOR is opened.
If there is any problem, check DOOR S/W of the refrigerator.
2. Fluorescent lamp of HOME BAR is also to become ON by DOOR S/W when the door is opened.
If the lamp does not come to be ON by the opening of HOME BAR, check HOME BAR S/W.
(Refrigerator DOOR OPEN SENSOR at MAIN PCB)
1. Check the voltage by placing (+) terminal on and (-) terminal on
of CN31.
2. If about DC 5V is measured on Refrigerator DOOR OPEN, it is normal.
3. If about DC 0V is measured on Refrigerator DOOR CLOSE, it is normal.
When there is any problem, check the wire connection and DOOR S/W.
4. HOME BAR S/W does not have DOOR OPEN Sensor.
(Lamp Inside the Freezer)
1. There is a generally used glow lamp in the Freezer. This lamp is controlled not by the contact of
DOOR S/W, but by RELAY on MAIN PCB. DOOR S/W senses DOOR OPEN/CLOSE of the
door of the Freezer. One contact is used to control the Ice-Dispenser.
Check the lamp inside the Freezer according to the method described in the above.
(Freezer DOOR OPEN SENSOR at MAIN PCB)
1. Check the voltage by placing (+) terminal on
and (-) terminal on
of CN30.
2. If about DC 0V is measured on Freezer DOOR OPEN, it is normal.
3. If about DC 5V is measured on Freezer DOOR CLOSE, it is normal.
When there is any problem, check the wire connection and DOOR S/W.
To Fluorescent Lamp
Measuring
terminal
Measuring
terminal
Information
1. Beside check of DOOR S/W, check the lamp itself inside Freezer and Freezer Lamp Control RELAY on PCB.
2. Also, check the lamp inside Refrigerator and INVERTER PCB.
3. Since Freezer and Refrigerator uses different contacts for DOOR OPEN sensing, OFF contact is used when
Freezer is closed and ON contact is used when Refrigerator is closed.
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