#40G ON fault / #50B OFF fault

Hitachi Elevator High Elevator

Model: MCA | Code: 42

Applicable Systems
WJ200

Symptoms

40G relay ON fault; 50B relay OFF fault

Possible Causes

  • 40G relay stuck energized
  • 50B relay not releasing
  • relay contact welding

Troubleshooting Steps

  1. Step 1: Check 40G relay
    Verify the fault is resolved after completing this step.
  2. Step 2: inspect 50B relay
    Verify the fault is resolved after completing this step.
  3. Step 3: verify relay control circuits
    Verify the fault is resolved after completing this step.
  4. Step 4: replace if welded
    Verify the fault is resolved after completing this step.

How to Reset

Power cycle; replace relay if needed

Related Hitachi Fault Codes

Source: jxrunrui.cn/zhishi/1498.html; jingyan.baidu.com/article/a378c9...

Category: Elevator