Installation Guide for Danfoss AK-CC55 Single Coil Case Controller

Quick guide from the manual

To start regulation quickly, follow these steps:

1. Open parameter r12 and stop the regulation (set to 0).
2. Select the application number based on the wiring diagrams (pages 2-4) and set it in parameter o61.
3. Set the network address in o03.
4. Select a set of presets from the Food type table using parameter r89.
5. Set the desired cut-out temperature (r00), thermostat air temperature (r15), and alarm air temperature (A36).
6. Select the refrigerant via parameter o30.
7. Set the pressure transmitter range (o20, o21), defrost method (d01), interval (d03), and sensor (d10).
8. Set the maximum defrost time (d04) and defrost stop temperature (d02).
9. Open parameter r12 and start the regulation.
10. Configure network settings (MODBUS scan or Lon RS485/Ethernet settings) if applicable.

Installation and Wiring

The controller is provided with factory labels for a generic application. Specific labels are provided for the selected application. Ensure that data communication cables are kept separate from high voltage cables, maintaining a distance of at least 10 cm. Use separate cable trays and avoid long cables at the low voltage DI input.

When replacing an AK-CC 550A with an AK-CC55, note that wiring principles have changed: pressure sensor connections, SPDT relay wiring (NO/NC switched), and Modbus connection schemes are different. Refer to the wiring diagrams on pages 2-4 for specific application connections.

Operation with setting display

The AK-UI55 display shows values in three digits and allows temperature display in Celsius or Fahrenheit. The display features navigation arrows, an information button, and a SET button for configuration. A long press (3 seconds) on the SET button accesses the configuration menu. A long press on the arrow buttons can start a defrost or access the information menu.

Parameters and Configuration

Parameters are grouped for easy access. The main switch (r12) controls regulation. Other key parameters include application selection (o61), refrigerant type (o30), and defrost settings (d01-d04). The controller supports forced control of outputs when the main switch is set to service mode.

Troubleshooting

In an error situation, the alarm LED on the front will be on and the alarm relay will be activated. Press the alarm button for 3 seconds to view the alarm report. Common messages include:

• Err: Sensor error.
• Err1: Display cannot load data from the controller.
• Err2: Lost display communication.
• ALA: Alarm button activated.
• Loc: Configuration is locked (unlock by pressing up and down arrows simultaneously for 3 seconds).
• PS: Password required for access.

Technical Data

The controller operates on 115 V / 230 V, 50/60 Hz with a power consumption of 5 VA. It is designed for DIN rail mounting and has an IP20 enclosure rating. The clock battery backup provides 4 days of power reserve. Digital inputs require gold-plated contacts and a maximum cable length of 15 m.