Software WDT / dual input buffer fault

Hitachi Elevator High Elevator

Model: MCA | Code: 14

Applicable Systems
WJ200

Symptoms

Software watchdog timer activated; dual input buffer fault detected

Possible Causes

  • Software crash
  • watchdog timeout
  • input buffer IC failure
  • electrical interference

Troubleshooting Steps

  1. Step 1: Check software version
    Verify the fault is resolved after completing this step.
  2. Step 2: verify input buffer IC
    Verify the fault is resolved after completing this step.
  3. Step 3: inspect for EMI
    Verify the fault is resolved after completing this step.
  4. Step 4: re-flash firmware
    Verify the fault is resolved after completing this step.

How to Reset

Power cycle; update firmware if needed

Related Hitachi Fault Codes

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

Category: Elevator