Danfoss AK-PC 781A

Manual
User guide
ADAP-KOOL® Refrigeration control systems
Capacity controller
with recovery function
AK-PC 781A

Danfoss AK-PC 781A Specifications

General

Brand	Danfoss
Model	AK-PC 781A
Category	Controller
Language	English

Summary

Controller Design and Components

Module Survey

Provides an overview of controller and extension modules, including types and connections.

Controller Module Details

Extension Module Types

Compressor and Condenser Control Design

Mounting and Wiring Procedures

Module Mounting Procedures

Provides step-by-step instructions for mounting controller and extension modules.

Wiring Connections

Details how to connect inputs and outputs according to the example.

System Configuration and Operation

Initial Setup Procedures

Covers PC connection, Service Tool, Authorization, Unlock, and System Setup.

Plant Type and Compressor Configuration

Guides setting plant type, suction group, and compressor capacity controls.

System Component Configuration

Details configuration for oil management, condenser fans, high pressure, receiver, and heat recovery.

General Function Configuration

Covers general purpose functions, alarms, display, and PI settings.

IO Configuration and Verification

Explains I/O configuration and checking of inputs/outputs and settings.

Operational Procedures

Covers schedule function, network installation, control startup, and manual control.

Regulating Functions Explained

Suction Pressure Regulation

Compressor Capacity Control

Explains capacity control methods, power packs, speed control, and safety.

Condenser Regulation

Heat Recovery and CO2 Systems

Receiver and Parallel Compression Control

Appendix B: Alarm Texts

Suction Group Alarms

Compressor Safety and Oil Alarms

Condenser and System Alarms

Appendix C: Recommended Connections

Example Connection Schematics