Fuji Bikes 5000G11S/P11S Trouble shooting, Protective function activation, Overcurrent

7.Trouble shooting

7.1Protective function activation

(1)Overcurrent

Overcurrent during acceleration OC1

Overcurrent

during deceleration

OC2

Overcurrent

running at constant speed

OC3

YES

Remove the short-circuit

Are the motor connecting terminals (U, V, W) short-circuited or grounded?

and ground fault.

NO

NO

NO

Reduce the load or increase

YES

Is the load excessive?

the inverter capacity.

NO

NO

NO

Can the torque boost

NO

Is the torque boost

amount be reduced?

correct?

YES

YES

Reduce the torque boost.

Is the acceleration time

NO

setting too short

compared with the load?

YES

NO

Is the deceleration time

setting too short compared

with the load?

Faulty inverter or error

YES

due to noise.

NO

Has the load changed

Consult with Fuji Electric.

suddenly?

YES

Can the acceleration time

YES

setting be prolonged?

NO

YES

Can the deceleration time

Prolong time settings.

setting be prolonged?

NO

The braking method

Reduce the load or increase

Reduce the load or increase

requires inspection.

the inverter capacity.

the inverter capacity.

Contact Fuji Electric.

(2) Ground fault

Ground fault

EF

Remove the grounded part.

YES

Is a part in the inverter output
circuit (cable, motor) grounded?	NO

Faulty inverter or error due to noise.

Contact Fuji Electric.

Note:The ground fault protective function is provided only for inverter for nominal applied motors rated at 40HP or more.

(3) Fuse brown

Fuse brown

FUS

Possible short-circuit

within the inverter.

Contact Fuji Electric.

7-1