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T
roubleshooting 4-5
Indication
Possible Cause
Corrective Action
Correct the input power problem
Bus
Input voltage too high
Use step down transformer
Bus
overvoltage
fl
In ut
voltage
too
high
Use line reactor to minimize spikes
overvoltage
fault
Decel rate set too quickly
Adjust Decel rate setting
Overhauling motor load Correct the motor load problem
Correct the input power problem
Use step up transformer
Bus
undervoltage
fl
Insuf
ficient input voltage
Check power line disturbances
due to starting other equipment
undervoltage
fault
Insuf
ficient
in ut
voltage
Monitor power line for date/time
correlation of power fluctuations
Contact power company
Correct the motor loading problem
Heatsink
Motor overloaded
V
erify proper motor and control
rating
Heatsink
overtemp
fl
Reduce ambient temperature
overtem
fault
Ambient temperature too
Relocate control to cooler area
Ambient
tem erature
too
high
Add cooling fans or air conditioner
to control cabinet
Computer
malfunction
fault
Corrupt memory contents
Reset control by pressing Keypad
Stop Key for more than one
second
Parameter
block fault
Corrupt memory contents
Restore all parameters to factory
settings
Power
supply
overload
fault
excessive loading of
control terminals REF
and/or V+
Correct the power supply loading
problem
Output short
Motor failure
Check motor windings for shorts
Out ut
short
circuit fault
Shorted motor leads
Check motor lead wires for shorts
Auto restart
fault
Number of restarts
exceeded parameter
value
Check fault log and correct the
source of failures
Ground fault
Motor failure
Check motor windings for shorts
G
roun
d
f
au
l
t
Shorted motor leads
Check motor lead wires for shorts