Applicable Systems
Mitsubishi Elevator
Symptoms
29 safety circuit operation latched in memory
Possible Causes
- Safety circuit opened during running
- latched fault
- persistent safety issue
- safety relay degradation
Troubleshooting Steps
- Step 1: Check safety circuit
Verify the fault is resolved after completing this step. - Step 2: clear latched fault
Verify the fault is resolved after completing this step. - Step 3: verify all safety devices
Verify the fault is resolved after completing this step. - Step 4: inspect relay contacts
Verify the fault is resolved after completing this step.
How to Reset
Clear latch; power cycle
Source: baike.baidu.com; baijiahao (三菱故障代码); diantijob.com
Category: Elevator