Cause : Motor Overheat comes when the motor overheat signal entered to a multi-function analog input terminal exceeded the alarm level (H3-02 or H3-10 = E).

1. Motor thermostat wiring is faulty (PTC input). Repair the PTC input wiring.
2. There is a fault on the machine side (e.g., the machine is locked up).
   • Check the status of the machine.
   • Remove the cause of the fault.
3. Motor has overheated.
   • Check the load size, accel/decel times, and cycle times.
   • Decrease the load.
   • Increase accel and decel times (C1-01 to C1-08).
   • Adjust the preset V/f pattern (E1-04 through E1-10). This involves reducing E1-08 and E1-10.
   • Check the motor-rated current.
   • Enter motor-rated current on motor nameplate (E2-01).
   • Ensure the motor cooling system is operating normally.
   • Repair or replace the motor cooling system.