Delta VFD037B43A

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 VFD037B43A Specifications

General

Brand	Delta
Model	VFD037B43A
Category	DC Drives
Language	English

Summary

Chapter 2 Installation and Wiring

2.1 Ambient Conditions

Specifies the recommended environmental conditions for operating and storing the AC motor drive.

2.2 Installation

Instructions for physically mounting the AC motor drive, including ventilation and mounting surface requirements.

2.4 Wiring

General wiring information, applicable codes, and specific wiring precautions for AC motor drives.

2.4.1 Basic Wiring

Guidelines for basic wiring connections, including power and ground terminals, and post-wiring checks.

2.4.2 External Wiring

2.4.3 Main Terminals Connections

Details the terminal symbols and functions for mains power and motor connections.

2.4.4 Control Terminals

Describes the circuit diagrams for digital inputs and the functions of various control terminals.

2.4.5 Main Circuit Terminals

Chapter 3 Start Up

3.1 Preparations before Start-up

Essential checks and preparations to ensure correct wiring and safe operation before applying power.

3.2 Operation Method

3.3 Trial Run

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

Chapter 4 Digital Keypad Operation

4.1 Description of the Digital Keypad VFD-PU01

4.2 How to Operate the Digital Keypad VFD-PU01

Provides step-by-step guides on navigating modes, setting parameters, and modifying data via the keypad.

Chapter 5 Parameters

5.2 Parameter Settings for Applications

5.3 Description of Parameter Settings

Chapter 6 Fault Code Information

6.1 Common Problems and Solutions

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

6.2 Reset

Describes the three methods available to reset the AC motor drive after resolving a fault.

Chapter 7 Troubleshooting

7.1 Over Current (OC)

A flowchart to diagnose and resolve over-current faults, covering various scenarios and causes.

7.2 Ground Fault

Troubleshooting steps for ground fault issues, including checks for short circuits and grounding.

7.3 Over Voltage (OV)

A guide to diagnose and resolve over-voltage faults, considering load conditions and settings.

7.4 Low Voltage (Lv)

Troubleshooting flowchart for low voltage faults, addressing power supply and component issues.

7.5 Over Heat (OH)

Steps to diagnose and resolve overheating issues related to the AC motor drive's heat sink and fan.

7.6 Overload

Guidance on troubleshooting overload conditions, including motor load and thermal relay settings.

7.7 Display of PU01 is Abnormal

Steps to troubleshoot abnormal or missing displays on the PU01 keypad.

7.8 Phase Loss (PHL)

Diagnostic steps for phase loss faults, focusing on wiring and input voltage checks.

7.9 Motor cannot Run

A troubleshooting flowchart to identify reasons why the motor may not be running.

7.10 Motor Speed cannot be Changed

Steps to diagnose issues where motor speed cannot be adjusted or changed as expected.

7.11 Motor Stalls during Acceleration

Troubleshooting guide for motor stalls that occur specifically during the acceleration phase.

7.12 The Motor does not Run as Expected

Steps to address situations where the motor's performance deviates from expectations.

Chapter 8 Maintenance and Inspections

Periodic Inspection