Error 7 DC link

Error: 7.1 (0701hex \| 1793dec) Description: DC link overvoltage

Cause	Measure
Maximum permitted DC link voltage exceeded.	– Check the connection of the braking resistor. – Decrease deceleration. – Check the configuration of the braking resistor (resistance value).

Error: 7.1 (0701hex | 1793dec)

Description: DC link overvoltage

Cause

Measure

Maximum permitted DC link voltage exceeded.

– Check the connection of the braking resistor.

– Decrease deceleration.

– Check the configuration of the braking resistor (resistance value).

Error: 7.2 (0702hex \| 1794dec) Description: DC link discharge failed

Cause	Measure
DC link voltage level not dropped below discharge threshold within discharge time.	Contact SEW-EURODRIVE Service.

Error: 7.2 (0702hex | 1794dec)

Description: DC link discharge failed

Cause

Measure

DC link voltage level not dropped below discharge threshold within discharge time.

Contact SEW-EURODRIVE Service.

Error: 7.3 (0703hex \| 1795dec) Description: Permitted voltage between PE and DC link exceeded

Cause	Measure
Permitted tolerance range of voltage -Uz measured against PE exceeded.	– Reduce dynamic load change from motoring operation to regenerative operation. – Check the project planning with line filter. – Check the wiring.

Error: 7.3 (0703hex | 1795dec)

Description: Permitted voltage between PE and DC link exceeded

Cause

Measure

Permitted tolerance range of voltage -Uz measured against PE exceeded.

– Reduce dynamic load change from motoring operation to regenerative operation.

– Check the project planning with line filter.

– Check the wiring.

Error: 7.4 (0704hex \| 1796dec) Description: DC link undervoltage

Cause	Measure
DC link voltage exceeded lower limit and output stage inhibited by hardware.	– Reduce the dynamic load change from regenerative operation to motoring operation. – Check previous error, e.g. line phase failure or power off in motoring operation.

Error: 7.4 (0704hex | 1796dec)

Description: DC link undervoltage

Cause

Measure

DC link voltage exceeded lower limit and output stage inhibited by hardware.

– Reduce the dynamic load change from regenerative operation to motoring operation.

– Check previous error, e.g. line phase failure or power off in motoring operation.

Error: 7.5 (0705hex \| 1797dec) Description: DC link overcurrent

Cause	Measure
DC link current too high in motor mode or generator mode.	– In motor mode: – Check whether the load is too high. – Check the project planning. – In generator mode: – Check whether the braking resistance value is too low-impedance. – Check whether a short circuit has occurred on the braking resistor.

Error: 7.5 (0705hex | 1797dec)

Description: DC link overcurrent

Cause

Measure

DC link current too high in motor mode or generator mode.

– In motor mode:

– Check whether the load is too high.

– Check the project planning.

– In generator mode:

– Check whether the braking resistance value is too low-impedance.

– Check whether a short circuit has occurred on the braking resistor.

Error: 7.6 (0706hex \| 1798dec) Description: Overvoltage at the A-side or B-side

	Cause	Measure
	Excessive regenerative power of an actuator.	Check the application.
	The fault can be caused as follows: – The energy storage unit is dimensioned too small. – The fuse has tripped.	Check the project planning.
	Ground fault detected at the positive terminal on the A-side or B-side.	Eliminate ground fault.
	The fault can be caused as follows: – The braking resistor is dimensioned too small. – The fuse has tripped.	Check the project planning.
	Excessive recharging power from power grid.	Check the application.

Error: 7.7 (0707hex \| 1799dec) Description: Undervoltage at the A-side or B-side

	Cause	Measure
	Excessive motor power of an actuator.	Check the application.
	Energy store dimensioned too small.	Check the project planning.
	Excessive motor power.	Check the application.
	Insufficient recharging power from power grid.	Check the application.
	The energy storage unit has reached the end of its useful life.	Replace the energy storage bundle.

Error: 7.8 (0708hex \| 1800dec) Description: Short circuit at the A-side or B-side

	Cause	Measure
	Short circuit in output stage end.	Remove the short circuit.
	Storage capacity set incorrectly.	Check the startup.
	Storage backup triggered during operation.	Check the project planning, startup, and wiring.
	Contact problems detected in the storage connection.	Check the wiring.
	Additional load detected on the DC link during charge monitoring.	Check the project planning and the wiring.

Error: 7.9 (0709hex \| 1801dec) Description: Short circuit in the DC link

Cause	Measure
Short circuit in the DC link.	– Check the DC link connection. – Remove the short circuit.

Error: 7.9 (0709hex | 1801dec)

Description: Short circuit in the DC link

Cause

Measure

Short circuit in the DC link.

– Check the DC link connection.

– Remove the short circuit.

Error: 7.10 (070Ahex \| 1802dec) Description: Pre-charging timeout

Cause	Measure
Capacitive load too high in the DC link.	Check the project planning.

Error: 7.10 (070Ahex | 1802dec)

Description: Pre-charging timeout

Cause

Measure

Capacitive load too high in the DC link.

Check the project planning.

Error: 7.11 (070Bhex \| 1803dec) Description: DC link overcurrent at rectifier

Cause	Measure
The fault can be caused as follows: – The maximum permitted DC link voltage limit of the rectifier was exceeded. – The AC voltage component of the DC link voltage is too high.	– Check the system and nearby devices for ground faults. – Check the quality of the supply system (line voltage distortion). – Check the line voltage.

Error: 7.11 (070Bhex | 1803dec)

Description: DC link overcurrent at rectifier

Cause

Measure

The fault can be caused as follows:

– The maximum permitted DC link voltage limit of the rectifier was exceeded.

– The AC voltage component of the DC link voltage is too high.

– Check the system and nearby devices for ground faults.

– Check the quality of the supply system (line voltage distortion).

– Check the line voltage.

Error: 7.12 (070Chex \| 1804dec) Description: Load before connecting the grid

Cause	Measure
The DC link was overloaded after completion of precharging and before connecting the supply system. The delay in connection of the supply system can be caused by a second line contactor, for example.	Eliminate the cause for the delayed grid connection.

Error: 7.12 (070Chex | 1804dec)

Description: Load before connecting the grid

Cause

Measure

The DC link was overloaded after completion of precharging and before connecting the supply system. The delay in connection of the supply system can be caused by a second line contactor, for example.

Eliminate the cause for the delayed grid connection.

Error: 7.13 (070Dhex \| 1805dec) Description: Isolation overrun

Cause	Measure
The rms value of the voltage +Ua or the voltage +Ub measured against PE is above the permitted insulation voltage for a longer period of time. This can be due to the following reasons: – The voltages +Ua and +Ub have an unfavorable ratio. – The leakage currents against PE are not balanced. – The insulation is faulty.	– Reduce the excessive voltage or increase the voltage of the other side. or – Eliminate the insulation fault.
The rms value of the voltage -Uz measured against PE is above the permitted insulation voltage for a longer period of time. This can be due to the following reasons: – The leakage currents against PE are not balanced. – The insulation is faulty.	– Acknowledge the warning. – If the warning occurs again, switch the device off and on again. or – Eliminate the insulation fault. – If the warning occurs repeatedly, contact SEW‑EURODRIVE Service.

Error: 7.13 (070Dhex | 1805dec)

Description: Isolation overrun

Cause

Measure

The rms value of the voltage +Ua or the voltage +Ub measured against PE is above the permitted insulation voltage for a longer period of time. This can be due to the following reasons:

– The voltages +Ua and +Ub have an unfavorable ratio.

– The leakage currents against PE are not balanced.

– 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 voltage -Uz measured against PE is above the permitted insulation voltage for a longer period of time. This can be due to the following reasons:

– The leakage currents against PE are not balanced.

– 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.

Error: 7.14 (070Ehex \| 1806dec) Description: Overvoltage on the DC link busbar

	Cause	Measure
	Braking resistor dimensioned too small.	Check the project planning.
	A fuse has tripped.	– Check fuse. – Check the project planning.
	Excessive recharging power from power grid.	Check the application.
	Excessive regenerative power of an actuator.	Check the application.
	Energy store dimensioned too small.	Check the project planning.

Error: 7.16 (0710hex \| 1808dec) Description: Short circuit at the A-side

	Cause	Measure
	Storage capacity set incorrectly.	Check the startup.
	Storage backup triggered during operation.	Check the project planning, startup, and wiring.
	Contact problems detected in the storage connection.	Check the wiring.
	Additional load detected on the DC link during charge monitoring.	Check the project planning and the wiring.
	The A-side is short-circuited.	Remove the short circuit.

Error: 7.17 (0711hex \| 1809dec) Description: Short circuit at the B-side

	Cause	Measure
	Storage capacity set incorrectly.	Check the startup.
	Storage backup triggered during operation.	Check the project planning, startup, and wiring.
	Contact problems detected in the storage connection.	Check the wiring.
	Additional load detected on the DC link during charge monitoring.	Check the project planning and the wiring.
	The B-side is short-circuited.	Remove the short circuit.

Error: 7.18 (0712hex \| 1810dec) Description: Capacity measurement failed

Cause	Measure
The fault can be caused as follows: – The DC link capacity is too low. – The precharging device is defective for devices in parallel operation. – The connection of the charging current measurement is defective.	Contact SEW-EURODRIVE Service.

Error: 7.18 (0712hex | 1810dec)

Description: Capacity measurement failed

Cause

Measure

The fault can be caused as follows:

– The DC link capacity is too low.

– The precharging device is defective for devices in parallel operation.

– The connection of the charging current measurement is defective.

Contact SEW-EURODRIVE Service.