What to do if the yellow LED is lit on my Lenze 9350?
If the yellow LED is lit, it could be because the brake resistor is not connected. Ensure the brake resistor is properly connected. Alternatively, the brake resistor might be dimensioned with a too high impedance. If permissible, use a low-resistance brake resistor, or connect several braking units in parallel.
What to do if Lenze 9350 DC Drives controller sets pulse inhibit and reports overvoltage?
If the controller sets a pulse inhibit during braking and reports overvoltage, it could be because the braking unit is not connected to the terminals +U, ?U of the G G controller. Connect the braking unit to these terminals. Another possible cause is an incorrectly set switching threshold. Adapt switching thresholds of the braking unit and controller to the mains voltage.
How to fix a Lenze DC Drives with an error if the green LED is not lit?
If the green LED is not lit, it indicates that there is no voltage at terminals +U, ?U G G. Switch on the mains. Otherwise, connect the braking unit to the terminals +U, ?U of the controller G G.
Why is the brake resistor overheating in my Lenze DC Drives?
If the brake resistor is overheating, it might be due to incorrect resistor dimensioning. Select an appropriate resistor for the drive, possibly using a 9352 instead of a 9351. Another cause might be an incorrectly set switching threshold of the braking unit. In this case, adapt switching thresholds of the braking unit and controller to the mains voltage.
Why are the brake resistors heating irregularly during parallel operation of Lenze DC Drives?
Irregular heating of brake resistors during parallel operation can occur for several reasons. First, check that braking units connected in parallel are connected to terminals +U, ?U of the controller(s). Ensure the brake resistor is connected. Also, the switching thresholds of the braking units which are connected in parallel may not be set equally, adapt switching thresholds of braking unit and controller to the mains voltage. Ensure braking units are configured correctly as master/slave. Finally, connect synchronization.
Why is the yellow LED continuously lit and the brake resistor overheating on my Lenze 9350?
If the yellow LED is continuously lit and the brake resistor is overheating, the switching threshold(s) of the braking unit(s) may be set incorrectly. Adapt switching thresholds of the braking unit and controller to the mains voltage.
What to do if Lenze Controller sets pulse inhibit in braking operation?
If the Lenze Controller sets a pulse inhibit during braking and the yellow LED is off, it could be due to the braking unit not being properly connected to the +UG and -UG terminals of the controller. Ensure the braking unit is correctly connected to these terminals. Alternatively, the switching threshold may be incorrectly set. In this case, adapt the switching thresholds of the braking unit and controller to the mains voltage.
Why is the yellow LED continuously lit on my Lenze Controller and the brake resistor overheating?
If the yellow LED on your Lenze Controller is continuously lit and the brake resistor is overheating, the switching threshold(s) of the braking unit(s) might be set incorrectly. You should adapt the switching thresholds of the braking unit and the controller to the mains voltage.
Why is the brake resistor overheating in my Lenze Controller?
If the brake resistor is overheating in your Lenze Controller setup, it may be due to incorrect resistor dimensioning. Select an appropriate resistor for the drive, consider using a 9352 if you are using 9351. Another possible cause is an incorrectly set switching threshold of the braking unit. Adapt the switching thresholds of the braking unit and controller to the mains voltage.
Why is the yellow LED lit on my Lenze Controller?
If the yellow LED is lit on your Lenze Controller, it could be because the brake resistor is not connected. Ensure that the brake resistor is properly connected. Another possibility is that the brake resistor is dimensioned with a too high impedance. In this case, use a low-resistance brake resistor (if permissible) or consider connecting several braking units in parallel.
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