Error 7 DC link
Error: 7.01 (0701hex | 1793dec) Description: DC link overvoltage | ||
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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: 7.02 (0702hex | 1794dec) Description: DC link discharge failed | ||
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Cause | Measure | |
DC link voltage level not dropped below discharge threshold within discharge time. | Contact SEW‑EURODRIVE Service. | |
Error: 7.03 (0703hex | 1795dec) Description: Permitted voltage between PE and DC link exceeded | ||
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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: 7.04 (0704hex | 1796dec) Description: DC link undervoltage | ||
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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: 7.05 (0705hex | 1797dec) Description: DC link overcurrent | ||
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Cause | Measure | |
DC link current too high in motor 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: 7.06 (0706hex | 1798dec) Description: Overvoltage at the A-side or B-side | ||
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Cause | Measure | |
Excessive regenerative power of an actuator. | Check the application. | |
The error 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 error can be caused as follows: – The braking resistor is dimensioned too small. – The fuse has tripped. | Check the project planning. | |
Excessive recharging power from the grid. | Check the application. | |
Error: 7.07 (0707hex | 1799dec) Description: Undervoltage at the A-side or B-side | ||
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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. | |
The energy storage unit has reached the end of its useful life. | Replace the energy storage unit. | |
Error: 7.08 (0708hex | 1800dec) Description: Short circuit at the A-side or B-side | ||
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Cause | Measure | |
Short circuit in output stage end. | Eliminate the short circuit. | |
Storage capacity not set correctly. | Check startup. | |
Storage fuse tripped during operation. | Check the project planning, startup, and wiring. | |
Contact problems detected in storage connection. | Check the wiring. | |
Additional load detected on the DC link during charge monitoring. | Check the project planning and wiring. | |
Error: 7.09 (0709hex | 1801dec) Description: Short circuit in DC link | ||
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Cause | Measure | |
Short circuit in the DC link. | – Check the DC link connection. – Remove the short circuit. – Check the supply voltage pre-charge. | |
Error: 7.10 (070Ahex | 1802dec) Description: Pre-charging timeout | ||
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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 | ||
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Cause | Measure | |
The error 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 | ||
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Cause | Measure | |
The DC link was overloaded after completion of pre-charging 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 | ||
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Cause | Measure | |
The effective value of the voltage +Va or the voltage +Vb 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 +Va and +Vb 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 effective value of the voltage -Vz 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: 7.14 (070Ehex | 1806dec) Description: Overvoltage on the DC link busbar | ||
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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 the grid. | Check the application. | |
Excessive regenerative power of an actuator. | Check the application. | |
Energy storage unit dimensioned too small. | Check the project planning. | |
Error: 7.16 (0710hex | 1808dec) Description: Short circuit at the A-side | ||
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Cause | Measure | |
Storage capacity not set correctly. | Check startup. | |
Storage fuse tripped during operation. | Check the project planning, startup, and wiring. | |
Contact problems detected in storage connection. | Check the wiring. | |
Additional load detected on the DC link during charge monitoring. | Check the project planning and wiring. | |
The A-side is short-circuited. | Eliminate the short circuit. | |
Error: 7.17 (0711hex | 1809dec) Description: Short circuit at the B-side | ||
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Cause | Measure | |
Storage capacity not set correctly. | Check startup. | |
Storage fuse tripped during operation. | Check the project planning, startup, and wiring. | |
Contact problems detected in storage connection. | Check the wiring. | |
Additional load detected on the DC link during charge monitoring. | Check the project planning and wiring. | |
The B-side is short-circuited. | Eliminate the short circuit. | |
Error: 7.18 (0712hex | 1810dec) Description: Capacity measurement failed | ||
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Cause | Measure | |
The error 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. | |
