Problem & Status
Display
Possible Cause
Action
Control
±
12V Supply
Under Voltage Fault
(Blinking 6)
Insufficient control ac
voltage on voltage on J1-5
to J1-6.
Check voltage with meter.
Internal drive failure.
Contact distributor.
Output Over Current or
Bus Over Voltage Fault
(Blinking 7)
Motor power wiring (J2-2,
3, or 4) short circuit.
Check for short.
Line-to-line or
line-to-ground/neutral
internal motor winding
short circuit.
Check for short.
Insufficient motor
inductance for output over
current faults.
Check motor inductance
against drive minimum
specification.
Motor ac power input
voltage too high.
Reduce ac input voltage to
within specification.
Disconnected regeneration
resistor on J5, or external
regeneration resistor
ohmage too small for Bus
Over Voltage fault.
Check the connections on
J5.
Shunt Regulator Overload
(Blinking 9)
Excessive regen in
application.
Improper external regen
wiring or components on
J5.
Check connections on J5.
MA930 Manual
D - 3
Summary of Contents for OC930
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