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Spare parts
We recommend that you stock spare parts to reduce down time, including these parts:
Quantity
Part description Symbol
Used Spare
Notes
Cooling fan FAN 1 1 015S, 022S, 015N, 022N,
015L to 075L
015H to 075H
Case CV 1 1
x Housing cover
x Main case
x Terminal covers
Capacitor Life Curves
The DC bus inside the inverter uses a large capacitor as shown in the diagram below.
The capacitor handles high voltage and current as it smoothes the power for use by the
inverter. So, any degradation of the capacitor will affect the performance of the inverter.
Capacitor life is reduced in higher ambient temperatures, as the graph below
demonstrates. Be sure to keep the ambient temperature at acceptable levels, and
perform maintenance inspections on the fan, heat sink, and other components. If the
inverter is installed on a cabinet, the ambient temperature is the temperature inside
the cabinet.
Rectifier
Motor
InverterConverter
Internal
DC Bus
Power
Input
L1
L2
L3
U/T1
V/T2
W/T3
Variable-frequency Drive
611
Troubleshooting and
Maintenance
6 11
Troubleshooting and
Maintenance