Service During Use - Danfoss VLT 6000 Installation Manual

®
VLT 5000/6000/8000
High Power Installation Guide

7. Service During Use

Preventive maintenance
To ensure a long and problem-free use of the frequency converter we recommend that you per-
form preventive maintenance.
Cleaning of filters IP 54 (NEMA 12)
Filters in the door must be serviced on a regular basis. The interval must be defined from instal-
lation to installation to ensure proper function based on the dust contents in the air.
Cleaning of the heat sink
During normal use it is not necessary to clean the heat sink. The forced airflow will keep the fins
free from dust and other substances. In case the environment is very dusty, the heat sink can be
cleaned by blowing compressed air over the heat sink from the top or the bottom of the frequency
converter.
Remember to switch off the frequency converter before cleaning.
Checking connections
Measuring the temperature on power connections with a thermal camera or infrared meter is
recommended as a preventive maintenance activity. Early detection of changes in the power con-
nections to the frequency converter allows relevant action to avoid overheating connections and
in worst case stops.
Checking temperatures and running conditions
We recommend that you note the typical data during operation like:
•
•
•
•
Based on these registrations it is possible to follow trends that indicate if maintenance is necessary
or other changes to the operating conditions.
Motor current at specified frequencies, i.e. 40 and 50 Hz
Heat sink temperature at a defined ambient temperature
Intermediate voltage
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MI.90.J2.02 - VLT ® is a registered Danfoss trademark
7. Service During Use
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