CG Drives & Automation 01-7318-01r1 Troubleshooting, Diagnoses and Maintenance 153
12.3 Maintenance
The AC drive is designed to require minimum of servicing
and maintenance. There are however some things which
must be checked regularly in order to optimise product life
time.
• Keep the AC drive unit clean and cooling efficient (clean
air inlets, heatsink profile, parts, components, etc)
• There is an internal fan that should be inspected and
cleaned from dust if necessary.
• If AC drives are built into cabinets, also check and clean
the dust filters of the cabinets regularly.
• Check external wiring, connections and control signals.
• Check tightening of all terminal screws regularly, espe-
cially important are power and motor cable connections
Preventive maintenance can optimise the product life time
and secure trouble free operation without interruptions.
For more information on maintenance, please contact your
CG Drives & Automation service partner.
Precautions to take with a connected motor
If work must be carried out on a connected motor or on the
driven machine, the mains voltage must always first be
disconnected from the drive unit.
If your drive is connected to a PMSM (Permanent magnet
motor) it is most important that you also disconnect the
motor before performing any maintenance on the drive unit.
NOTE:
Refer to motor manufacturers instruction manual for
motor maintenance requirements.
WARNING!
Do not work on a drive when a rotating
PMSM- permanent magnet motor is
connected to it.
A rotating PMSM motor energizes the drive
including its power terminals.
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