Maintenance; Diagnostic Help - Parker EX3 Notice D'instruction

EX3 – EX4 – EX6 – EX8
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5.6 Maintenance

The bearings have a double protective coating and are greased for life. The bearings are chosen for
20,000 hours operation under a specified cycle (speed and load). Beyond this, they must be replaced
at the factory.
Visually inspect the motor annually: tightness of screws, cable entries, possible corrosion, lip seal
(gas/dust motor only)...Any damaged components should, imperatively, be replaced.
The ability of the KM1 power circuit relay to work correctly should be checked every year; this being an
integral part of the safety features.
The power contactor KM1 should be replaced in accordance with its operation lifespan and number of
manoeuvres. A yearly test, intended to check on the ability of the contactor to detect condition
changes, should also be carried out.

5.7 Diagnostic help

We have set out below several symptoms with possible causes. This list is by no means exhaustive, it
is advisable, therefore, in any case of operating anomaly to refer to the associated servoamplifier
commissioning manual (the diagnostic display details will help you with your investigation).
You find that you
cannot rotate the
motor by hand:
You have trouble
starting or running
the motor:
The minimum insulation resistance value measured under a max. 50V
DC is 50 MΩ:
You discover that
the motor drifts:
You notice that the
motor is racing:
Conserver cette notice d'instruction
– Check that no mechanical parts are blocking it, and that it is not
jammed.
– Check the power supply to the brake.
– Check on the fuses, the voltage at the terminals (there could be an
overload or the bearings could be jammed), also checks on the load
current.
– Check the power supply to the brake (+ 24 V ± 10 %) and its
polarity.
– Check on any thermal protection.
– Check on the servomotor insulation (if in doubt, carry out hot and
cold measurements).
•
Between the phase and the casing
•
Between the thermal protection and the casing
•
Between the brake coil and the casing
•
Between the resolver coils and the casing.
– Reset the offset of the servoamplifier after having given a zero
instruction to the speed input.
– Check that the servoamplifier speed instruction is set to 0 V.
– Check that you are not in torque control mode instead of speed
control mode.
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PVD 3628 – 01 /2009
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