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  • DEUTSCH, seite 26

Warnings

CAUTION
CAUTION
Cables must not be connected or disconnected, nor signal tests carried out,
while the power is switched on.
The Varispeed F7 DC bus capacitor remains charged even after the power has been
switched off. To avoid an electric shock hazard, disconnect the frequency inverter from the
mains before carrying out maintenance. Then wait for at least 5 minutes after all LEDs
have gone out.
Do not perform a withstand voltage test on any part of the Varispeed. The frequency
inverter contains semiconductors, which are not designed for such high voltages.
Do not remove the digital operator while the mains supply is switched on. The printed cir-
cuit board must also not be touched while the inverter is connected to the power.
Never connect general LC/RC interference suppression filters, capacitors or overvoltage
protection devices to the inverter input or output.
To avoid unnecessary overcurrent faults, etc. being displayed, the signaling contacts of any
contactor or switch fitted between inverter and motor must be integrated into the inverter
control logic (e.g. baseblock).
This is absolutely imperative!
This manual must be read thoroughly before connecting and operating the inverter. All
safety precautions and instructions for use must be followed.
The inverter may must be operated with the appropriate line filters, following the installation
instructions in this manual and with all covers closed and terminals covered.
Only then will adequate protection be provided. Please do not connect or operate any
equipment with visible damage or missing parts. The operating company is responsible
for any injuries or equipment damage resulting from failure to heed the warnings in this
manual.
EN-2

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