Delta VFD370B43A - 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.

Delta VFD370B43A Specifications

General

Brand	Delta
Model	VFD370B43A
Category	DC Drives
Language	English

Summary

Preface

DANGER!

Critical safety warnings regarding electrical hazards and proper handling of AC motor drives.

WARNING!

Chapter 1 Introduction

1.3 Preparation for Installation and Wiring

Chapter 2 Installation and Wiring

2.1 Ambient Conditions

2.2 Installation

Guidelines for mounting the AC motor drive vertically, considering heat dissipation and cabinet installation.

2.4 Wiring

Instructions and precautions for connecting power and control terminals, including applicable codes.

2.4.1 Basic Wiring

2.4.2 External Wiring

2.4.3 Main Terminals Connections

Explains the function of main power and output terminals for connecting motors and other components.

2.4.4 Control Terminals

Describes the circuit diagrams and functions for digital inputs and outputs, including SINK and SOURCE modes.

2.4.5 Main Circuit Terminals

Chapter 3 Start Up

3.1 Preparations before Start-up

Critical checks and preparations to ensure correct wiring, safety, and readiness before applying power to the drive.

3.3 Trial Run

Procedure for performing a trial run to verify motor direction, stability, and acceleration/deceleration characteristics.

Chapter 4 Digital Keypad Operation

4.1 Description of the Digital Keypad VFD-PU01

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 specific parameters, their settings, factory defaults, and functional impact.

Chapter 6 Fault Code Information

6.1 Common Problems and Solutions

Table listing common fault names, descriptions, and corrective actions to troubleshoot drive issues.

6.2 Reset

Chapter 7 Troubleshooting

7.1 Over Current (OC)

Flowchart to diagnose and resolve over-current faults, considering load, acceleration time, and torque compensation.

7.9 Motor cannot Run

Diagnostic flowchart to identify reasons why the motor is not running, covering wiring, power, faults, and settings.

Chapter 8 Maintenance and Inspections