Maintenance And Inspection; Repairs - BONFIGLIOLI DGM MPM Technical Manual

1.9.5

Maintenance and inspection

The drive controllers may only be maintained and
inspected by electricians with recognised training. Unless
explicitly described in this operating manual, changes to
hardware and software may only be undertaken by
Bonfiglioli experts or persons authorised by Bonfiglioli
Riduttori S.p.A..
Cleaning the drive controllers
Drive controllers are maintenance-free if operated as
intended. If the air contains dust, the cooling ribs of the
motor and drive controller have to be cleaned regularly. If
devices are fitted with integrated fans, we would
recommend cleaning with compressed air.
Measurement of insulation resistance on
control part
An insulation test on the control card's input terminals is
not permitted.
Measurement of insulation resistance on
power stack
The power stack of an DGM Modular is tested with 2.02
kV in the course of series testing.
Should the insulation resistance have to be measured
during a system test, this can be done under the following
conditions:
◼
an insulation test can be undertaken for the power
stack alone,
◼
to avoid excessively high voltages, all the DGM
Modular's connection cables must be disconnected
before testing.
◼
a 500 V DC insulation tester should be used.
Test object
Ground
DC insulation tester
Fig. 5: Insulation measurement on the power stack
Operating manual for DGM Modular | DOC02389740-0006 | 2021-07 | V1.70 EN
Pressure test on an DGM Modular
IMPORTANT INFORMATION
A pressure test is not permitted on a standard DGM
Modular.
1.9.6

Repairs

DAMAGE TO PROPERTY POSSIBLE
If the information is not observed, the drive controller
could be damaged and destroyed during subsequent
commissioning.
◼
Repairs to the drive controller may only be
performed by the Bonfiglioli Service department.
DANGER!
Risk of death due to electrical shock!
Death or serious injury!
De-energise drive controller and secure it
against being restarted.
Danger due to electrical shock and
discharge. Wait two minutes (discharge
time of the capacitors) after shut-down.
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