Warnings - Omron VARISPEED L7 Manual

Warnings

CAUTION
Cables must not be connected or disconnected, nor signal tests carried out, while the power is
switched on.
The Varispeed L7 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 inverter. It 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 circuit 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 over current faults, etc., being displayed, the signaling contacts of any contac-
tor 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 pre-
cautions and instructions for use must be followed.
The inverter 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.
VII