80 ACS 300 User’s Manual
Chapter 8 - Fault Tracing
(6) PANEL COM ERR Control Panel was removed
when control was in Local mode.
Due to safety reasons, the drive
stops in this fault condition.
• Attach the Control Panel and
reset the fault, then change to
Remote mode and remove
Panel.
• Use remote (wired) controls to
reset the fault, then start and
run with remote controls
• There might be a loose contact.
Check the panel connection.
(10) BUS COMM FLT Bus communication error • Check bus connections
(7) UNIT FAULT ACS 300 heatsink temperature
too high.
CHECK:
• Heatsink dissipation
• Dust and dirt
• Air flow
•Fan
• Ambient temperature
• Reduce switching frequency.
• Check load current
Earth faults or short circuits. CHECK:
• Terminals
•Motor
• Cables
With frame size R2 high load
inertia / short ramp
CHECK:
• Ramps times
• Remove mechanical problems
• Dimensioning
(8) UNIT FAULT Inverter control unsuccessful. • Switch power off.
• If fault persists, contact your
nearest ACS 300 supplier.
Fault indication Possible cause Remedy
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