1
1.1
1.2
1.2.1
1.2.2
1.3
1.4
2
2.1
2.2
2.3
3
3.1
3.2
3.2.1
3.2.1.1
3.2.1.2
3.2.1.3
3.2.1.4
3.2.1.5
3.2.1.6
3.2.1.7
3.2.2
3.2.2.1
3.2.2.2
3.2.2.3
3.2.2.4
3.2.2.5
3.2.2.6
3.2.2.7
3.2.2.8
3.2.2.9
3.2.2.9.1
3.2.2.9.2
3.3
Contents
Introduction 7
Purpose of this Design Guide 7
Additional Resources 7
Supplementary Documentation 7
VLT® Motion Control Tool MCT 10 Software Support 7
Manual and Software Version 7
Approvals and Certifications 7
Safety 9
Safety Symbols 9
Qualified Personnel 9
Safety Precautions 9
Product Overview 11
VLT® Compressor Drive CDS 803 Family Overview 11
VLT® Compressor Drive CDS 803 Features 12
Compressor Features 12
Secure Start-up 12
Compressor Minimum Speed Detection 13
Short-cycle Protection 14
Anti-reverse Protection 14
Oil Return Management 15
Data Readouts and Commissioning 15
Undersized Compressor 16
Application Features 16
Automatic Motor Adaptation (AMA) 16
Motor Thermal Protection 16
Built-in PID Controller 17
Automatic Restart 17
Flying Start 17
Frequency Bypass 17
Motor Preheat 17
Programmable Set-ups 18
Smart Logic Control (SLC) 18
Comparators 19
Logic Rules 19
VLT® Compressor Drive CDS 803 Protections 19
AJ330233902305en-000201/130R0596 | 3Danfoss A/S © 2021.05
Contents
VLT® Compressor Drive CDS 803
Design Guide