External call timeout - group of landings

ThyssenKrupp Elevator Medium Elevator

Model: TCM/MC2 | Code: 25 20

Applicable Systems
ThyssenKrupp Control System

Symptoms

External call communication timeout for multiple landings

Possible Causes

  • Multiple landing panel communication failure
  • CAN bus segment fault

Troubleshooting Steps

  1. Step 1: Check CAN bus segment
    Verify the fault is resolved after completing this step.
  2. Step 2: inspect affected panels
    Verify the fault is resolved after completing this step.
  3. Step 3: verify bus topology
    Verify the fault is resolved after completing this step.

How to Reset

Power cycle; re-initialize communication

Source: beijiaxin.cn; zhihu.com/p/577262471; renrendoc MC2-C manual

Category: Elevator