#40D ON fault / SDS1 simultaneous ON

Hitachi Elevator High Elevator

Model: MCA | Code: 43

Applicable Systems
WJ200

Symptoms

40D relay ON fault; SDS1 (deceleration switch) simultaneously ON

Possible Causes

  • 40D relay energized when should not be
  • SDS1 switch stuck
  • relay/switch fault

Troubleshooting Steps

  1. Step 1: Check 40D relay
    Verify the fault is resolved after completing this step.
  2. Step 2: inspect SDS1 switch
    Verify the fault is resolved after completing this step.
  3. Step 3: verify relay control circuit
    Verify the fault is resolved after completing this step.

How to Reset

Power cycle after repair

Related Hitachi Fault Codes

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Category: Elevator