Kollmorgen MMC Smart Drive Series, Hardware Manual

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320 Kollmorgen - June 2014
MMC Smart Drive Hardware Manual
-
MAINTENANCE AND TROUBLESHOOTING
12
Drive Bus Over
Voltage Fault
Excessive regeneration of
power.
The motor may regener-
ate too much peak energy
through the drive’s power
supply. A fault is generat-
ed to prevent overload.
Change the deceleration or mo-
tion profile.
Check shunt connections and
where necessary, properly make
connections.
Reduce the reflected inertia of
your mechanical system.
Use a larger motor and/or drive.
Excessive AC input volt-
age.
Verify input AC voltage is within
specifications. Adjust according-
ly.
Output short circuit.
Remove all power and motor
connections, and perform a con-
tinuity check from the DC bus to
the U, V, and W motor outputs. If
a continuity exists, check for wire
fibers between terminals, con-
tact Kollmorgen
Motor cabling wires short-
ed together.
Disconnect motor power cables
from the drive. Test the cables
for short circuits. Replace cable
if necessary.
Internal motor winding
short circuit.
Disconnect motor power cables
from the motor. If the motor is dif-
ficult to turn by hand, it may need
to be replaced. Test winding re-
sistance to confirm short circuit.
230V motor used with a
460V drive and drive pow-
ered at 460V. Set the drive for operation at
230V and apply 230V power to
the drive.
13
Drive PM1 Over
Current Fault
Current feedback ex-
ceeds the drive over cur-
rent fault limit.
Adjust the over current fault limit.
Output short circuit.
Remove all power and motor
connections, and perform a con-
tinuity check from the DC bus to
the U, V, and W motor outputs. If
a short exists, check for wire fi-
bers between terminals, contact
Kollmorgen
Motor cabling wires short-
ed together.
Disconnect motor power cables
from the drive. If faults stop, re-
place cable.
Internal motor winding
short circuit.
Disconnect motor power cables
from the motor. If the motor is dif-
ficult to turn by hand, it may need
to be replaced.
Table 11-2: Drive Diagnostic LED Codes (Continued)
Code Description Possible Causes Possible Remedies