Fault 7 DC link

Subfault: 7.6 Description: Overvoltage A-side or B-side
	Response: Output stage inhibit
	Cause	Measure
	Ground fault at the positive terminal on the A-side or B-side.	Eliminate the ground fault.
	Braking resistance too high.	Check the technical data of the braking resistor.
	Excessive regenerative power of an actuator.	Check the application.
	Energy storage unit dimensioned too small.	Check the project planning.

Subfault: 7.7 Description: Undervoltage A-side or B-side
	Response: Warning
	Cause	Measure
	Excessive motor power of an actuator.	Check the application.
	Energy storage unit dimensioned too small.	Check the project planning.
	Excessive motor power.	Check the application.
	Insufficient recharging power from power grid.	Check the application.

Subfault: 7.8 Description: Short circuit A-side or B-side
	Response: Output stage inhibit
	Cause	Measure
	Capacitance of the storage unit not parameterized correctly.	Check the parameterization.
	Short circuit in output stage end.	Eliminate the short circuit.

Subfault: 7.13 Description: Insulation overrun
	Response: Warning
Cause	Measure
The rms value of the +Va voltage or the +Vb voltage measured against PE has been greater than the permissible insulation voltage for a long period of time. This can be due to the following reasons: – The +Va and +Vb voltages have an unfavorable ratio. – The leakage currents against PE are not symmetrical. – The insulation is faulty.	– Reduce the excessive voltage or increase the voltage of the other side. – Eliminate the insulation fault.
The rms value of the -Vz voltage measured against PE has been greater than the permissible insulation voltage for a long period of time. This can be due to the following reasons: – The leakage currents against PE are not symmetrical. – The insulation is faulty.	– Acknowledge the warning. – If the warning occurs again, switch the device off and on again. – Eliminate the insulation fault. – If the warning occurs repeatedly, contact SEW-EURODRIVE Service.

Subfault: 7.13

Description: Insulation overrun

Response: Warning

Cause

Measure

The rms value of the +Va voltage or the +Vb voltage measured against PE has been greater than the permissible insulation voltage for a long period of time. This can be due to the following reasons:

– The +Va and +Vb voltages have an unfavorable ratio.

– The leakage currents against PE are not symmetrical.

– The insulation is faulty.

– Reduce the excessive voltage or increase the voltage of the other side.

– Eliminate the insulation fault.

The rms value of the -Vz voltage measured against PE has been greater than the permissible insulation voltage for a long period of time. This can be due to the following reasons:

– The leakage currents against PE are not symmetrical.

– The insulation is faulty.

– Acknowledge the warning.

– If the warning occurs again, switch the device off and on again.

– Eliminate the insulation fault.

– If the warning occurs repeatedly, contact SEW-EURODRIVE Service.