DCS DW Not Closed Error

What does DW not closed mean?

During the Door Check Sequence (DCS), the DW (Door Closed) safety contact at the specified level did not register as closed when required. This indicates that the elevator door is not fully secured, posing a safety risk and preventing normal operation of the OTIS 2000 Controllers MCS120/MCS220.

• Elevator door not fully closed.
• Misaligned or faulty DW safety contact switch.
• Debris preventing the door from fully latching or closing.
• Wiring issue in the DW safety circuit.

Click steps to track your progress.

1. 1

   Identify the specific level where the DW not closed error occurred from the GAA21750AK3 service tool.

2. 2

   Visually confirm the door is fully closed and latched.

3. 3

   Inspect the DW safety contact for physical damage, misalignment, or signs of wear.

4. 4

   Measure continuity across the DW contact terminals when the door is closed, expecting a closed circuit.