Danfoss iC7 Series Design Guide

Table 42: Maintenance Schedule for Liquid-cooled Drives (continued)
Component Inspection
interval
(1)
Service
schedule
(2)
Preventive maintenance actions
Power unit heat
sinks
1 year 6 years Check that the heat sink temperature across all cooling circuits or power phases is
balanced. Imbalanced temperature of the cooling circuits is a possible sign of a re-
striction. Under normal conditions, clean or acid-wash the heat sinks every 6 years
with Danfoss recommended cleaning products. Refill the coolant system and log
the new coolant specification values.
Auxiliary equip-
ment
1 year According
to manu-
facturer
recom-
menda-
tions
Check that the sensors, gauges, and indicators are functioning correctly. Act based
on the findings.
System cooling
capacity
1 year Based on
findings
Test the cooling capacity and the thermal transfer of the system. Record the
coolant system flow, pressure, and input and output temperature, and compare to
the previous measurements. Act based on the findings.
1) Defined as the time after the commissioning/startup or the time from the previous inspection.
2) Defined as the time after the commissioning/startup or the time from the previous service schedule actions.
9.2 Maintenance Log for Cooling System
During the commissioning phase of the product and during each inspection refer to the maintenance schedule. Record values such as
the ambient air temperature, system pressure, flow, and input/output cooling liquid temperature during run condition. Record the water
chemical analysis values and the type and percentages of glycol and inhibitor or pre-mixed solutions of the liquid coolant.
The initial values create a base-line value to compare versus future values measured during preventive maintenance intervals. Record the
chemical analysis values each time the liquid coolant is replaced. Record all the maintenance tasks and service tasks with counter values,
date, and time.
9.3 Using the Product Modified Label
In the accessories bag, there is also a "product modified" label. The function of the label is to tell the service personnel about the changes
that are made in the AC drive.
e30bg773.10
P rod uc t modifie d
Date:
Date:
Date:
Figure 113: The Product Modified Label
1. Attach the label on the side of the AC drive, in a place where it is easy to find.
a. Attach the label, for example, next to the other labels on the power unit.
2. If changes are made to the AC drive, write the change and date on the label.
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Design Guide | iC7 Series Liquid-cooled System Modules

Danfoss iC7 Series Specifications

General

Brand	Danfoss
Model	iC7 Series
Category	Media Converter
Language	English