Inverter protection circuit action (SS-LFO)

Mitsubishi Elevator Critical Elevator

Model: P1/F-board | Code: E63

Applicable Systems
Mitsubishi Elevator

Symptoms

Inverter protection circuit activated (LFO)

Possible Causes

  • Inverter internal protection
  • over-current
  • over-voltage
  • IGBT fault
  • inverter hardware failure

Troubleshooting Steps

  1. Step 1: Check inverter error log
    Verify the fault is resolved after completing this step.
  2. Step 2: inspect IGBT
    Verify the fault is resolved after completing this step.
  3. Step 3: verify inverter input/output
    Verify the fault is resolved after completing this step.
  4. Step 4: check cooling
    Verify the fault is resolved after completing this step.
  5. Step 5: replace if faulty
    Verify the fault is resolved after completing this step.

How to Reset

Power cycle; replace inverter if persistent

Related Mitsubishi Fault Codes

Source: baike.baidu.com; baijiahao (三菱故障代码); diantijob.com

Category: Elevator