Delta VFD022B21A - User Manual

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.

Summary

Preface

DANGER!

Critical safety warnings for installation and operation.

Chapter 2 Installation and Wiring

2.2 Installation

2.4 Wiring

General wiring information and precautions for AC motor drives.

2.4.1 Basic Wiring

Essential steps and safety precautions for performing basic wiring connections.

2.4.3 Main Terminals Connections

Explanation of terminal symbols and functions for main power connections.

2.4.4 Control Terminals

2.4.5 Main Circuit Terminals

Chapter 3 Start Up

3.1 Preparations before Start-up

Crucial checks to perform before applying power and starting the AC motor drive.

3.3 Trial Run

Chapter 4 Digital Keypad Operation

4.2 How to Operate the Digital Keypad VFD-PU01

Chapter 5 Parameters

5.1 Summary of Parameter Settings

5.3 Description of Parameter Settings

Detailed explanations of user parameters, basic parameters, and their settings.

Chapter 6 Fault Code Information

6.1 Common Problems and Solutions

Table listing fault names, descriptions, and corrective actions for common issues.

6.2 Reset

Chapter 7 Troubleshooting

7.1 Over Current (OC)

Flowchart to diagnose and resolve over-current faults.

7.3 Over Voltage (OV)

Flowchart for troubleshooting over-voltage conditions.

7.4 Low Voltage (Lv)

Troubleshooting steps for low-voltage faults.

7.5 Over Heat (OH)

Flowchart to identify and resolve overheating issues.

7.7 Display of PU01 is Abnormal

7.9 Motor cannot Run

Flowchart to diagnose why the motor is not running.

Chapter 8 Maintenance and Inspections

Periodic Inspection

Appendix C How to Select the Right AC Motor Drive

C.1 Capacity Formulas

C.2 General Precaution

C.3 How to Choose a Suitable Motor

Delta VFD022B21A Specifications

General

Brand	Delta
Model	VFD022B21A
Category	DC Drives
Language	English