• DOK-DIAX02-DDS02.1*ANA-ANW1-EN-E1,44 • 12.96
100
"Bridge fuse"
The current in the power transistor bridge has risen to more than twice
the unit’s rated current. The drive torque function is immediately disa-
bled.
Cause:
1. Short-circuit in the motor cable
2. Power section of the drive controller defective.
Remedy:
1. Check the motor cable for short-circuits
2. If necessary, replace the drive controller.
"Earth connection"
The sum of the phase currents is monitored. During normal operation,
the sum = 0. The earth connection fuse will react when the sum of the
currents rises above 0.5 x I
N
.
Cause:
1. Defective motor cable
2. Earth connection in the motor.
Remedy:
1./2. Check motor cable and motor for earth connection and replace if
necessary.
"Faulty hardware synchronization"
Cause:
1. The pulse width modulator of the drive controller is synchronized by
a phase control loop. The synchronization is monitored and the above
error message signalled when a fault is detected.
Remedy:
1. Replace the unit and send in for inspection.
"Brake fault"
For MDD motors with integral brakes, the drive controller pilots the brake.
The brake current is monitored. If it lies outside the permissible range, the
above error message will be signalled.
Cause:
1. The supply voltage for the holding brake has not been properly
connected or lies outside the tolerance window (24 V +/- 10%).
2. The motor cable is incomplete or wrongly connected (reverse polar-
ity).
3. Defective holding brake
4. Defective drive controller.
Remedy:
1. Check the supply voltage.
2. Check the motor cable.
3. Replace the motor.
4. Replace the controller.
9. Diagnostics and fault clearance
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