Danfoss AK-PC 781A User Manual

44 Capacity controller RS8HE202 © Danfoss 2017-07 AK-PC 781A
Mounting
Mounting of analog output module
1. Lift the top part off the basic module
The basic module must not be connected to voltage.
Press in the plate on the left-hand side of the light-emitting
diodes and the plate on the right-hand side for the red address
changers.
Lift the top part off the basic module.
2. Mount the extension module in the basic module
3. Put the top part back on the basic module
The analog extension module will supply a signal to the ICMTS valve
There are two outputs.

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.

I/O 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