Danfoss VLT FCD 302 Operating Manual page 71

Operating Guide | VLT® Decentral Drive FCD 302
8 Maintenance
8.1 Preventive Maintenance Recommendations
Generally, all technical equipment, including Danfoss AC drives, need a minimum level of preventive maintenance. To ensure trouble-free
operation and long life of the drive, regular maintenance is recommended. It is also recommended as a good service practice to record a
maintenance log with counter values, date, and time describing the maintenance and service actions.
Danfoss recommends the following inspections and service intervals for air-cooled drives/systems.
The service schedule for part replacements can vary depending on operating conditions. Under specific conditions, the
combination of stressful operation and environmental conditions work together to reduce the lifetime of the components
significantly. These conditions can include, for example, extreme temperature, dust, high humidity, hours of use, corrosive
environment, and loading.
For operation in stressful conditions, Danfoss offers the DrivePro® Preventive Maintenance service. DrivePro® services extend the lifetime
and increase the performance of the product with scheduled maintenance including customized part replacements. DrivePro® services
are tailored to the specific application and operating conditions.
Table 19: Maintenance Schedule for Air-cooled Drives
Component Inspection
interval
Installation
Visual inspection 1 year
Auxiliary equip- 1 year
ment
EMC consideration 1 year
Cable routing 1 year
Control wiring 1 year
Clearances 1 year
Sealing 1 year
Corrosive environ- 1 year
ments
Drive
Danfoss A/S © 2025.04
Service Preventive maintenance actions
(1) (2)
schedule
– Check for the unusual, for example, for signs of overheating, aging, corrosion, and
for dusty and damaged components.
According Inspect equipment, switchgear, relays, disconnects, or fuses/circuit breakers. Exam-
to manu- ine the operation and condition for possible causes of operational faults or defects.
facturer rec- The continuity check on fuses must be performed by trained service personnel.
ommenda-
tions
– Inspect the wiring regarding the electromagnetic capability and the separation dis-
tance between control wiring and power cables.
– Check for parallel routing of motor cables, mains wiring, and signal wiring. Avoid
parallel routing. Avoid routing cables through free air without support. Check for ag-
ing and wearing of the cable insulation.
– Check for tightness, damaged or crimped wires, or ribbon wires. Terminate the con-
nections correctly with solid crimped ends. The use of shielded cables and grounded
EMC plate, or a twisted pair is recommended.
– Check that the external clearances for proper airflow for cooling follow the require-
ments for the frame and product type. For clearances, refer to the local design regu-
lations.
– Check that the sealing of the enclosure, the covers, and the cabinet doors are in
good condition.
– Conductive dust and aggressive gases, such as sulphide, chloride, and salt mist, can
damage the electrical and mechanical components. Air filters do not remove air-
borne corrosive chemicals. Act based on the findings.
NOTICE
Maintenance
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