Danfoss AK-CC 550A 115 V Instructions

Identification and Dimensions

The AK-CC 550A is a refrigeration controller. The identification section shows a diagram of the unit with reference number 084B8036. Dimensions are provided, indicating a length of 109 mm, a width of 180 mm, and a height of 61.5 mm.

The principle diagram illustrates the electrical connections, including terminals for sensors and power supply.

AKV Info

Information regarding the AKV system is provided, with a diagram showing connections for a 115 V a.c. coil and various sensor inputs.

Application Wiring Diagrams

Multiple wiring diagrams are presented for different applications (1 through 10). Each diagram shows the terminal connections for various inputs and outputs, including digital inputs (DI1, DI2, DI3), digital outputs (DO1-DO6), pressure transmitter (Pe), and communication interfaces (EKA Display, RS485, RJ45/MODBUS).

The diagrams detail the function of each terminal and the corresponding application setup.

Connections Overview

A comprehensive table outlines the connections for each application, detailing the status of digital outputs (DO1-DO6) and digital inputs (DI1, DI2, DI3) for various operational states like refrigeration, defrost, fan, and alarms.

Specific terminal functions are described:

• DI1, DI2: Digital input signals, active when short-circuited/opened.
• Pressure transmitter (AKS 32R): Connects to terminals 30, 31, 32. Signal can be received by up to 10 controllers.
• S2, S6: Pt 1000 ohm sensors for product or air temperature.
• S3, S4, S5: Pt 1000 ohm or PTC 1000 ohm sensors for air or defrost temperature.
• EKA Display: For external reading/operation, connects to terminals 51, 52, 53.
• RS485: For data communication, requires a module. Connects to terminals 51, 52, 53.
• RJ45: For data communication via TCP/IP module. Connects to terminals 54-58.
• MODBUS: For data communication, connects to terminals 56, 57, 58.

Output and Input Functions

Detailed descriptions are provided for each digital output (DO1-DO6) and digital input (DI1, DI2, DI3, D13), explaining their functions and connection requirements.

• DO1: Expansion valve connection (AKV/AKVA).
• DO2: Alarm, rail heat, heating element, night blind, suction line valve.
• DO3: Refrigeration, rail heat, heat function, defrost 2.
• DO4: Defrost, hot gas/drain valve.
• DO5: Fan.
• DO6: Light relay, rail heat, compressor 2.
• D13: Digital input signal (0/115 V a.c.).

Data Communication and Installation Considerations

Data Communication: Connections for MODBUS and RS 485 must comply with data communication cable requirements (see literature RC8AC). Diagrams show system manager/gateway connections and display connections for distances less than or greater than 15 meters.

Installation Considerations: Emphasizes that accidental damage, poor installation, or site conditions can lead to malfunctions. Danfoss is not responsible for defects caused by improper installation. Installers are responsible for thorough checks and safety devices. Special attention is given to signals to the controller when the compressor is stopped and the need for liquid receivers.

Operation and Settings

The display shows values with three digits, allowing temperature display in °C or °F. Light-emitting diodes (LEDs) on the front panel indicate relay activation (Refrigeration, Defrost, Fan) and flash during alarms.

Buttons: Used for navigating menus, changing settings, and accessing alarm codes. A short press of the upper button displays alarm codes. A short press of the lower button shows temperature. A four-second press of the lower button initiates manual defrost start/stop (except for Application 6).

Get a good start: A quick-start procedure involves opening parameter r12, selecting electrical connections, setting the electric connection number in parameter 061, and choosing a preset setting from the table (parameters 062).

Menu Survey: A detailed table lists all parameters with their codes, descriptions, applicable applications, min/max values, factory settings, and actual settings. Parameters cover normal operation, alarms, compressor control, defrost, fan control, injection control, real-time clock, and miscellaneous functions.

Fault Messages and Operating Status

Fault Messages: LED indicators flash and the alarm relay activates during error situations. Pushing the top button displays alarm reports (A-alarms and E-alarms). A table lists various alarm codes, descriptions, and their associated alarm relay groups.

Operating Status: Codes displayed on the screen indicate the controller's current operating status (e.g., Normal regulation, Waiting for end of coordinated defrost, Compressor running/stopped, Refrigeration stopped). A table provides a list of status codes and their meanings.

Data Communication Settings: A table defines how alarm messages are routed via the system manager, including settings for log only, alarm relay, and network transmission.