Troubleshooting

Symptom

Cause and solution

Overload or overcurrent fault of the unloaded motor during acceleration

Check the star/delta terminal connection in the motor. The nominal operating voltage of motor and inverter must match. The delta connection always yields the lower voltage of a multi-voltage motor.

Overload or overcurrent – motor does not turn

Check whether the rotor is blocked. If a mechanical brake is installed, make sure that it is released.

No enable for the inverter – display remains at "StoP"

  • Check whether the hardware enable signal is present at digital input 1.
  • Ensure proper +10 V user output voltage (between terminals 5 and 7).
  • If faulty, check the wiring of the user terminal strip.
  • Check P1-12 for terminal mode/keypad mode.
  • If keypad mode is selected, press the "Start" key.
  • The line voltage must correspond with the specified values.

The inverter does not start at extremely cold ambient conditions

The inverter does not start if the ambient temperature is below the specified ambient temperature range (see chapter Ambient conditions). Under such conditions, provide an on-site heat source that keeps the ambient temperature above the specified temperature.

No access to advanced menus

P1-14 must be set to the advanced access code. The value is "101" unless the user has changed the code in P2-40.