Stober SD6 - Page 371

ID 442426.04 371WE KEEP THINGS MOVING
Diagnosis
16
Manual SD6
16.6 36:High voltage
Triggering Level Response Counter
The voltage in the intermediate circuit exceeds the
permitted maximum (DC link voltage display in
E03).
Fault The power board is switched off and the drive becomes
torque-free/force-free. If the air override is inactive, a
possibly existing brake will be controlled to close.
Z36
Possible cause Test Measure Confirmable
Supply voltage too high Check whether the supply voltage exceeds
the permitted input voltage.
Take measures to adjust the supply voltage. Yes
No braking resistor connected Check the wiring. Connect a braking resistor.
Brake chopper is deactivated Check whether A22 = 0 is set. Enter the values of the braking resistor in
the A21, A22 and A23 parameters.
Braking resistor too small or too large • Check whether A21 does not reach the
permitted value.
• Check whether the resistance is suitable
to dissipate the power losses arising.
Connect a suitable braking resistor.
Braking ramps to steep Observe the DC link voltage during a
braking procedure, e.g. using a Scope
trace.
• Extend the braking ramps.
• Connect a suitable braking resistor.
• Check the application of the DC link
connection.
Brake chopper is faulty Observe the DC link voltage in the Scope. If
it increases to the overvoltage limit without
hindrance, the brake chopper is faulty.
Please contact our Service department.