ROM checksum error / overvoltage 10x

Hitachi Elevator High Elevator

Model: MCA | Code: 96

Applicable Systems
WJ200

Symptoms

ROM checksum error; overvoltage occurred 10 times

Possible Causes

  • ROM data corruption
  • checksum verification failed
  • frequent overvoltage events
  • ROM chip degradation

Troubleshooting Steps

  1. Step 1: Verify ROM data
    Verify the fault is resolved after completing this step.
  2. Step 2: re-flash ROM
    Verify the fault is resolved after completing this step.
  3. Step 3: check power supply stability
    Verify the fault is resolved after completing this step.
  4. Step 4: address overvoltage root cause
    Verify the fault is resolved after completing this step.

How to Reset

Power cycle; re-flash ROM if possible

Related Hitachi Fault Codes

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

Category: Elevator