Mitsubishi Mitsubishi Elevator Error Code 50

Mitsubishi Elevator Minor Door

Model: Mitsubishi Elevator | Code: 50

Applicable Systems
Mitsubishi Elevator

Symptoms

Door sensor fault. The door sensor signal is abnormal. Door operation may be affected.

Possible Causes

  • Door safety edge sensor fault: infrared emitter or receiver failed
  • Door reopening sensor signal out of range
  • Door sensor wiring broken or shorted
  • Door sensor lens contaminated with dust or moisture

Troubleshooting Steps

  1. Step 1: Check the equipment status and fault indicators to confirm the active fault code
    Fault indicator or HMI displays code 50 as active
  2. Step 2: Verify all electrical connections, wiring harnesses, and connector seating
    All connections secure, no corrosion, loose pins, or damaged wires
  3. Step 3: Check the safety circuit continuity and all safety interlock switches
    Safety circuit complete, all interlocks engaged
  4. Step 4: Inspect the specific safety device referenced in the fault (door switch, light curtain, E-stop)
    Safety device functional, contacts clean and responsive
  5. Step 5: Verify the brake mechanism: check brake pad wear, spring tension, and air gap
    Brake pads within wear limit, spring tension correct, air gap within spec
  6. Step 6: Test the safety function by simulating the fault condition and verifying response
    Safety function responds correctly within specified time
  7. Step 7: Reset the fault after fixing the safety device or circuit: press RESET
    Fault clears and safety system returns to ready state

How to Reset

To reset: 1) Fix the safety device or circuit fault. 2) Clear the fault on the HMI or controller. 3) Press RESET. Caution: Never bypass safety devices.

Frequently Asked Questions

  • Q: What does fault code 50 mean on the Mitsubishi Mitsubishi Elevator?

    Fault 50 indicates a safety-related fault. A safety device or circuit has been triggered. Always investigate the root cause before resetting; never bypass safety devices.

  • Q: Can I continue operating the equipment with fault 50 active?

    No. The equipment has detected a fault condition and has taken protective action (typically stopping or derating). Continuing to operate without fixing the root cause may cause further damage. Always investigate and fix the fault before resuming operation.

Related Mitsubishi Fault Codes

Source: Mitsubishi Elevator Controller F-Board Diagnostic Manual, Mitsubishi Electric Documentation

Category: Elevator