Danfoss iC7 Series Installation Manual page 17

Installation Guide | iC7 Series Liquid-cooled L Filter OF7Z5
Table 4: Maintenance Schedule for Liquid-cooled Filters
Component Inspection
interval
Cable routing 1 year
Power cabling 1 year
Control wiring 1 year
EMC consideration 1 year
Grounding 1 year
Proper clearances 1 year
Corrosive environ- 1 year
ments
Filter components
Capacitors 1 year
PCB 1 year
Insulators 1 year
Danfoss Drives Oy © 2024.11
(continued)
Service schedule
(1)
–
–
–
–
–
–
–
12–15 years
10–12 years
10–15 years
Preventive maintenance actions
(2)
Check for parallel routing of motor cables, mains wiring, and sig-
nal wiring. Avoid parallel routing. Avoid routing cables through
free air without support. Check for aging and wearing of the ca-
ble insulation.
Check for loose connections, aging, insulation condition, and
proper torque to the drive connections. Check for proper rat-
ing 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 tightness, damaged or crimped wires, or ribbon wires.
Terminate the connections correctly with solid crimped ends. The
use of shielded cables and grounded EMC plate, or a twisted pair
is recommended.
Inspect the installation wiring regarding the electromagnetic ca-
pability and the separation distance between control wiring and
power cables.
The drive system requires a dedicated ground wire connecting
the drive, the output filter, and the motor to the building ground.
Check that the ground connections are tight and free of paint or
oxidation. Daisy-chain connections are not allowed. If applicable,
braided straps are recommended.
Check that the required external clearances for proper airflow for
cooling are followed according to the type of the drive. For clear-
ances, refer to the local design regulations.
Conductive dust and aggressive gases, such as sulphide, chloride,
and salt mist, can damage the electrical and mechanical compo-
nents. Air filters do not remove airborne corrosive chemicals. Act
based on findings.
The expected life time of the capacitor is determined based on
load and the temperature of the environment. Replace parts ac-
cording to the service schedule. For applications with heavy loads
or demanding environments, replace the capacitors every 12
years. In a typical environment, within the specifications of the fil-
ter, replace every 15 years. Only trained service personnel are al-
lowed to perform this action.
Visually inspect the printed circuit boards for signs of damage or
degrading due to aging, corrosive environments, dust, or envi-
ronments with high temperatures. Only trained service personnel
are allowed to perform the inspection and service action.
Inspect the insulators for signs of degradation due to high tem-
perature and aging. Replacement is based on findings. Only
trained service personnel are allowed to perform this action.
Maintenance
AN447722950367en-000201 / 172K1111B | 17