Danfoss VLT FC 280 Operating Manual page 114

Operating Guide | VLT® Midi Drive FC 280
Table 58: Maintenance Schedule for Air-cooled Drives
Component Inspection
interval
Corrosive environ- 1 year
ments
Drive
Programming 1 year
Control panel 1 year
Drive cooling ca- 1 year
pacity
Cleaning and fil- 1 year
ters
Fans 1 year
Grounding 1 year
Power cables and 1 year
wiring
Vibration 1 year
Spare parts
Spare parts 1 year
Exchange units 1 year
and units stored
for long periods
before commis-
sioning
1) Defined as the time after the commissioning/startup or the time from the previous inspection.
114 | Danfoss A/S © 2024.10
(continued)
Service Preventive maintenance actions
(1) (2)
schedule
– 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.
– Check that the AC drive parameter settings are correct according to the motor,
drive application, and I/O configuration. Only trained service personnel are allowed
to perform this action.
– Check that the display pixels are intact. Check the event log for warnings and faults.
Repetitive events are a sign of potential issues. If necessary, contact a local service
center.
– Check for blockages or constrictions in the air passages of the cooling channel. The
heat sinks must be free of dust and condensation.
– Clean the interior of the enclosure annually, and more frequently if necessary. The
amount of dust in the filter or inside the enclosure is an indicator for when the next
cleaning or filter replacement is required.
3–10 years Inspect the condition and operational status of all cooling fans. With the power off,
the fan axis should feel tight, and spinning the fan with a finger, the rotation should
be almost silent and not have abnormal rotation resistance. When in RUN mode,
fan vibration, excessive or strange noise is a sign of the bearings wearing, and the
fan must be replaced.
– The drive system requires a dedicated ground wire connecting the drive, the out-
put filter, and the motor to the building ground. Check that the ground connec-
tions are tight and free of paint or oxidation. Daisy-chain connections are not al-
lowed. If applicable, braided straps are recommended.
– Check for loose connections, aging, insulation condition, and proper torque to the
drive connections. Check for proper rating of fuses and continuity check. Observe if
there are any signs of operation in a demanding environment. For example, discol-
oration of the fuse housing can be a sign of condensation or high temperatures.
– Check for abnormal vibration or noise coming from the drive to ensure that the en-
vironment is stable for electronic components.
2 years Stock spares in their original boxes in a dry and clean environment. Avoid hot stor-
age areas. Electrolytic capacitors require reforming as stated in the service sched-
ule. The reforming must be performed by trained service personnel.
2 years Visually inspect for signs of damage, water, high humidity, corrosion, and dust
within the visual field of view without disassembly. The exchange units with
mounted electrolytic capacitors require reforming as stated in the service schedule.
The reforming must be performed by trained service personnel.
Maintenance, Diagnostics, and Troubleshooting
AQ381425076031en-000201 / 130R1223