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ID 442426.04
371
WE 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.