Troubleshooting
table (cont’d)
Problem (and system
status numbers)
Possible cause
Action
Controller overtemperature
(3).
Temperature overload due to:
High ambient temperature.
Lower ambient temperature
to below 50
°
C (60
°
C, if
derated).
Restriction of cooling air
due to insufficient space
around unit.
Provide sufficient cooling
space.
Operation above
continuous power rating.
Operate within continuous
power rating. Add fan
option to controller to boost
continuous rating.
Fan inoperative.
Return to factory for fan
replacement.
IT Fault (4).
Excessive time at peak
current.
Check time spent at peak
current. If excessive,
change profile or load.
(Use larger motor/drive.)
Line-neutral fault (5).
Motor cable short to
ground.
Motor winding short.
Check motor cable.
Internal failure.
Contact distributor.
Servocontroller logic
supply undervoltage (6).
External short on signal
connectors.
Remove connectors and
reapply power.
Insufficient voltage on J1-5
and J1-6.
Check voltage with meter
(
≥
90 V).
Internal failure.
Contact distributor.
5 - 6
MA950
