Design Guide | iC7 Series Liquid-cooled System Modules
9 Maintenance
9.1 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 liquid-cooled drives/systems.
NOTICE
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 42: Maintenance Schedule for Liquid-cooled Drives
Component Inspection
interval
(1)
Service
schedule
(2)
Preventive maintenance actions
Installation
Visual inspection 1 year – Check for the unusual, for example, for signs of overheating, aging, corrosion, and
for dusty and damaged components.
Auxiliary equip-
ment
1 year According
to manu-
facturer
recom-
menda-
tions
Inspect equipment, switchgear, relays, disconnects, or fuses/circuit breakers. Exam-
ine the operation and condition for possible causes of operational faults or defects.
The continuity check on fuses must be performed by trained service personnel.
EMC considera-
tion
1 year – Inspect the wiring regarding the electromagnetic capability and the separation dis-
tance between control wiring and power cables.
Cable routing 1 year – 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
aging and wearing of the cable insulation.
Control wiring 1 year – 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.
Clearances 1 year – 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 reg-
ulations.
Sealing 1 year – Check that the sealing of the enclosure, the covers, and the cabinet doors are in
good condition.
Danfoss Drives Oy © 2024.03 AJ475942178716en-000101 / 172K2848A | 113
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