EN-5
Maintenance and Inspection
Other
Warnings
• Do not touch the Inverter terminals. Some of the terminals carry high voltages and are extremely dangerous.
Doing so can result in electric shock.
• Always have the protective cover in place when power is being supplied to the Inverter. When attaching the cover, always turn
OFF power to the Inverter through the MCCB.
Doing so can result in electric shock.
• After turning OFF the main circuit power supply, wait until the CHARGE indicator light goes out before performance maintenance
or inspections.
The capacitor will remain charged and is dangerous.
• Maintenance, inspection, and replacement of parts must be performed only by authorized personnel.
Remove all metal objects, such as watches and rings, before starting work. Always use grounded tools.
Failure to do so may result in electric shock.
• Be sure to completely stop the permanent magnet motor before maintenance and inspection.
Failure to do so may result in electric shock.
• A CMOS IC is used in the control board. Handle the control board and CMOS IC carefully. The CMOS IC can be destroyed by
static electricity if touched directly.
The CMOS IC can be destroyed by static electricity if touched directly.
• Do not change the wiring, or remove connectors or the Digital Operator, during operation.
Doing so can result in personal injury.
• Do not attempt to modify or alter the Inverter.
Doing so can result in electrical shock or injury.
• Do not subject the Inverter to halogen gases, such as fluorine, chlorine, bromine, and iodine, at any time even during transporta-
tion or installation.
Doing so will cause damage to the Inverter or the interior parts.
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 elec-
tric 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 contactor or switch fit-
ted 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 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.
WARNING
CAUTION
WARNING
CAUTION
CAUTION