Lenze 8250 series Brake unit - Manual (Page 32)

Troubleshooting and fault elimination
8250BA0903 6-1
6 Troubleshooting and fault elimination
Fault Cause Remedy
Green LED is not illuminated No voltage at terminals +U
G
, -U
G
• Switch on the mains
• Connect the brake unit to the
terminals +U
G
, -U
G
of the
controller
Controller sets pulse inhibit during
braking and indicates overvoltage
• Yellow LED is not illuminated
The brake unit is not connected to
the terminals +U
G
, -U
G
of the
controller
Connect the brake unit to the
terminals +U
G
, -U
G
of the controller
• Yellow LED is illuminated Brake resistor is not connected Connect brake resistor
Brake resistance too high Use lower-value brake resistor
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