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10 Maintenance, Decommissioning and Disposal
10.1 Warnings
W A R N I N G
HIGH VOLTAGE
Potentially lethal voltage is present on the connectors that may lead to death or serious injury.
Before working on the power or signal connectors (disconnecting or connecting the cable), or performing any maintenance
work, disconnect the Power Supply Module (PSM 510) from the mains and wait for the discharge time to elapse.
W A R N I N G
DISCHARGE TIME
The servo system contains DC-link capacitors that remain charged for some time after the mains supply is switched off at the
Power Supply Module (PSM 510). Failure to wait the specified time after power has been removed before performing service or
repair work could result in death or serious injury.
To avoid electrical shock, fully disconnect the Power Supply Module (PSM 510) from the mains and wait for the capacitors to
fully discharge before carrying out any maintenance work on the servo system or replacing components.
Minimum waiting time (minutes)
15
10.2 Inspection during Operation
10.2.1 ISD 511 Servo Drives
Carry out regular inspections during operation. Check the ISD 511 servo drives at regular intervals for anything unusual.
Pay particular attention to:
Unusual noises.
Overheated surfaces (temperatures up to 100 °C can occur in normal operation).
Uneven running.
Strong vibrations.
Loose fastenings.
Condition of electrical wiring and cables.
Poor heat dispersion.
10.2.2 System Modules
Carry out regular inspections during operation.
Check:
The cooling vents are not blocked.
The fan is not making any unusual noises.
The condition of electrical wiring and cables.
10.3 Maintenance Tasks
The ISD 511 servo drives are largely maintenance free. Only the shaft seal on the ISD 511 (if used) is subject to wear. The mainte-
nance tasks must be performed by qualified personnel. No other tasks are required.
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118 | Danfoss A/S © 2023.08
Maintenance, Decommissioning
and Disposal
VLT® Servo Drive System ISD 511
Operating Guide
