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Preface
Thank you for choosing DELTA’s sensorless vector control compact drive VFD-EL-W series. The VFD-EL-W series
are manufactured with high-quality components and materials and incorporate the latest microprocessor
technology available.
Use this manual for the AC Motor Drive installation, parameter setting, troubleshooting, and daily maintenance. To
guarantee safe operation, read the following safety guidelines before connecting power to the AC motor drive.
Keep this user manual at hand and distribute to all users for reference.
To ensure the safety of operators and equipment, only qualified personnel familiar with AC motor drive are to do
installation, start-up and maintenance. Always read this manual thoroughly before using VFD-EL-W series AC
Motor Drive, especially the DANGER ，WARNING and CAUTION notes. Failure to comply may result in personal
injury and equipment damage. If you have any questions, please contact your dealer.
PLEASE READ PRIOR TO INSTALLATION FOR SAFETY.
Disconnect AC input power before connecting any wiring to the AC motor drive.
Even if the power has been turned off, a charge may still remain in the DC-link
capacitors with hazardous voltages before the indicator on the digital keypad is
OFF. Do NOT touch the internal circuits and components.
There are highly sensitive CMOS IC components on the motor drive’s printed
circuit boards. These components are especially sensitive to static electricity.
Take anti-static measure before touching these components or the circuit boards.
Never modify the internal components or wiring.
Ground the AC motor drive by using the ground terminal. The grounding method
must comply with the laws of the country where the AC motor drive is to be
installed.
Use the VFD-EL-W series to control only variable speed three-phase induction
motors. The VFD-EL-W is NOT for controlling one-phase motors or for other
purposes.
Do NOT use the VFD-EL-W series for life support equipment or any life safety
situation.
To prevent personal injury, keep children and unqualified people away from the
equipment.
Never connect the AC motor drive output terminals U/T1, V/T2, and W/T3 directly
to the AC mains circuit power supply.
DO NOT use a Hi-Pot test for internal components. The semiconductors used in
the AC motor drive are easily damaged by high-voltage.
Even if the three-phase AC motor is stopped, a charge with hazardous voltages
may still remain in the main circuit terminals of the AC motor drive
Only qualified persons are allowed to install, wire and maintain the AC motor
drives.
When the AC motor drive uses the external terminal as the source of the
operation command, the motor may run immediately after applying power. At this
time, it is dangerous if people are at the scene.
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