Baldor VS1SM, Installation & Operating Manual

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MN761 Troubleshooting 9-1
Chapter 9
Troubleshooting
The VS1PF constantly monitors operating status and provides the following means to determine drive
status and to troubleshoot problems that may occur:
S
LEDs on the drive
S
Fault Codes displayed on LCD display
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Drive monitor and status parameters
S
Entries in the fault queue
9.1 Periodic Maintenance
Check the cooling fan, the fan should be unobstructed and free.
Clean all dirt and debris from the cover and fan (air inlet) area.
9.2 Reviewing Fault Status of the Drive
Table 9‐1 Fault Code Descriptions
Display Function Description / Cause. Cause Remedy
Overcurrent Output turns off when
output current exceeds
200% of rated current. Accel/Decel too short.
Load exceeds inverter
rating
Inverter started when the
motor is free running.
Output short circuit or
ground fault occurred.
Mechanical brake is
operating too fast.
Increase Accel/Decel time
or decrease load.
Resume only after stopping
the motor or use H22
Check output wiring.
Check the mechanical
brake.
Ground fault Output turns off when
ground current exceeds the
internal value. Ground fault has occurred
or motor insulation is
damaged.
Check the output wiring.
Replace the motor.
Overload Output turns off when
output current exceeds
150% of rated current for 1
minute.
Load exceeds inverter
rating.
Torque boost scale set too
large.
Decrease load or use
correctly sized inverter.
Reduce torque boost scale.
Overload trip Output turns off when
output current exceeds
150% of rated current for 1
minute.
Heat sink
overtemp Output turns off when heat
sink temperature exceeds
its limit. Cooling fan fault.
Poor air circulation.
Ambient temperature too
high.
Replace fan.
Remove air flow restriction.
Ambient must be < 40
°
C.
DC link capacitor
overload Output turns off when
Output Phase
loss Output turns off when one
or more output phases
(U, V, W) is open. Faulty output wiring.
Damaged motor. Verify output connections
Replace motor.
Over voltage Output turns off when the
DC link voltage exceeds
400 V (during motor
deceleration). Decel time is too short.
Regenerative load is
overhauling.
Line voltage is too high.
Increase Decel time.
Use Dynamic Brake Unit.
Reduce line voltage.