10 Maintenance
10.1 Preventive Maintenance Recommendations
Generally, all technical equipment, including Danfoss AC Drives need a minimum level of preventive maintenance. Regular mainte-
nance is recommended to ensure trouble-free operation and long life of the drive. It is also recommended, as a good service prac-
tice 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 VACON
®
NXP family drive/system.
NOTE: The service schedule for part replacements may vary depending on operation conditions. Under specific conditions, the com-
bination of stressful operating and environment conditions work together to significantly reduce the lifetime of the components.
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. Drive-
Pro
®
services are tailored to your application and operating conditions.
Table 17: Maintenance Schedule for Air-cooled Drives
Component
Inspec-
tion in-
terval
(1)
Service
sched-
ule
(2)
Preventive maintenance actions
Installation
Visual drive in-
spection
1 year
–
Check for the unusual, for example, for signs of overheating, aging, corrosion, and for
dusty and damaged components.
Auxiliary
equipment
1 year
Accord-
ing to
manufac-
turer rec-
ommen-
dations
Inspect equipment, switchgear, relays, disconnects or fuses/circuit breakers. Examine
the operation and condition for possible causes of operational faults or defects. The
continuity check on fuses is performed by trained service personnel.
EMC consider-
ation
1 year
–
Inspect the installation wiring regarding the electromagnetic capability and the sepa-
ration distance between control wiring and power cables.
Cable routing
1 year
–
Check for parallel routing of motor cables, mains wiring, and signal wiring. Parallel
routing must be avoided. Avoid routing cables through free air without support.
Check for aging and wearing of the cable insulation.
Control wiring
1 year
–
Check for tightness, damaged or crimped wires or ribbon wires. The connections
should be terminated correctly with solid crimped ends. The use of screened cables
and earthed EMC plate, or a twisted pair is recommended.
Proper clearan-
ces
1 year
–
Check that the required external clearances for proper airflow for cooling are followed
according to the frame designation and drive type of the drive. For clearances, refer to
the local design regulations.
Seals condition 1 year
–
Check that the seals of the enclosure, the covers, and the cabinet doors are in good
condition.
Corrosive envi-
ronments
1 year
–
Conductive dust and aggressive gases, such as sulphide, chloride, salt mist, and so on,
can damage the electrical and mechanical components. Air filters will not remove air-
borne corrosive chemicals. Act based on findings.
Drive
Programming
1 year
–
Check that the AC drive parameter settings are correct according to the motor, drive
application, and I/O configuration. Only trained service personnel may perform this ac-
tion.
Control panel
1 year
–
Check that the display pixels are intact. Check the event log for warnings, alarms, and
faults. Repetitive events are a sign of potential issues. Contact your local service center.
AQ275638903263en-000601 / DPD00910
124 | Danfoss A/S © 2022.12
Maintenance
VACON® NXS/NXP Air-cooled
Operating Guide
Содержание VACON NXS Air-cooled
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