Delta VFD075B23A

Preface
Thank you for choosing DELTA’s high-performance VFD-B Series. The VFD-B Series is manufactured with
high-quality components and materials and incorporate the latest microprocessor technology available.
This manual is to be used for the installation, parameter setting, troubleshooting, and daily maintenance of the
AC motor drive. To guarantee safe operation of the equipment, read the following safety guidelines before
connecting power to the AC motor drive. Keep this operating 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-B series AC
Motor Drive, especially the WARNING, DANGER 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.
DANGER!
1. AC input power must be disconnected before any wiring to the AC motor drive is made.
2. A charge may still remain in the DC-link capacitors with hazardous voltages, even if the power has been
turned off. To prevent personal injury, please ensure that power has turned off before opening the AC
motor drive and wait ten minutes for the capacitors to discharge to safe voltage levels.
3. Never reassemble internal components or wiring.
4. The AC motor drive may be destroyed beyond repair if incorrect cables are connected to the input/output
terminals. Never connect the AC motor drive output terminals U/T1, V/T2, and W/T3 directly to the AC
mains circuit power supply.
5. Ground the VFD-B using the ground terminal. The grounding method must comply with the laws of the
country where the AC motor drive is to be installed. Refer to the Basic Wiring Diagram.
6. VFD-B series is used only to control variable speed of 3-phase induction motors, NOT for 1-phase motors
or other purpose.
7. VFD-B series shall NOT be used for life support equipment or any life safety situation.

Delta VFD075B23A Specifications

General

Brand	Delta
Model	VFD075B23A
Category	DC Drives
Language	English

Summary

Preface

DANGER! Safety Guidelines

Crucial safety warnings for AC input power, capacitor discharge, wiring, and general usage.

WARNING! Component Sensitivity

Warnings about handling internal components and potential damage from static electricity.

CAUTION! Operational Precautions

Chapter 1 Introduction

1.1 Receiving and Inspection

Procedures for checking the AC motor drive package contents, inspecting for damage, and verifying part numbers.

1.3 Preparation for Installation and Wiring

Chapter 2 Installation and Wiring

2.1 Ambient Conditions

Specifies environmental conditions for operation, storage, and transportation of the AC motor drive.

2.2 Installation

Instructions on mounting, heat dissipation, and placement considerations for the AC motor drive.

2.4 Wiring

2.4.1 Basic Wiring

2.4.3 Main Terminals Connections

2.4.4 Control Terminals

Chapter 3 Start Up

3.1 Preparations before Start-up

Checklist of critical items to verify before applying power and starting the AC motor drive.

3.3 Trial Run

Chapter 4 Digital Keypad Operation

4.1 Description of the Digital Keypad VFD-PU01

Overview of the VFD-PU01 keypad, its keys, display messages, and status indicators.

4.2 How to Operate the Digital Keypad VFD-PU01

Chapter 5 Parameters

5.1 Summary of Parameter Settings

Overview of parameter groups and a summary table of user parameters and their settings.

5.2 Parameter Settings for Applications

5.3 Description of Parameter Settings

Detailed descriptions of various parameter groups, including user, basic, and protection parameters.

Chapter 6 Fault Code Information

6.1 Common Problems and Solutions

Lists common fault names, descriptions, and corrective actions for troubleshooting.

Chapter 7 Troubleshooting

7.1 Over Current (OC)

Flowchart for diagnosing and resolving over-current faults, including checks for short circuits and load.

7.3 Over Voltage (OV)

Flowchart for diagnosing and resolving over-voltage issues, checking voltage and braking settings.

7.4 Low Voltage (Lv)

7.5 Over Heat (OH)

7.6 Overload

7.9 Motor cannot Run

Comprehensive flowchart to diagnose why the motor cannot run, covering PU01, faults, wiring, and load.

7.10 Motor Speed cannot be Changed

7.11 Motor Stalls during Acceleration

Flowchart to diagnose motor stalling during acceleration, checking time, inertia, voltage, torque, and wiring.

Chapter 8 Maintenance and Inspections

Daily Inspection

Periodic Inspection