Danfoss Co2 Module Controller Universal Gateway User Guide

CO2 Module Controller Universal Gateway
User Guide

Electric Installation

Below is an illustration of the external connections that can be made in the remote control assembly.

Power supply to CDU
230V AC 1,2m cable for this is included.

Connect Module controller power supply cable to L1 (left terminal) and N (right terminal) of the condensing unit control panel – power
supply terminal block
Caution: If the cable needs to be replaced, it must either be short-circuit proof or it must be protected by a fuse on the other end.

RS485-1
Modbus interface for connection to the System Manager
RS485-2
Modbus interface for connection to the CDU.
1,8 m cable for this is included.
Connect this RS485-2 Modbus cable to terminal A and B of the condensing unit control panel – Modbus interface terminal block. Do not connect insulated shield to ground 

RS485-3
Modbus interface for connection to the evaporator controllers
3x LED Function explanation

• Blue led is ON when the CDU is connected and polled operation is complete
• Red led is flashing when there is a communication fault with an evaporator controller
• Green led is flashing during communication with an evaporator controller The green LED next to the 12V power supply terminals indicates “Power OK”.

Electric noise
Cables for data communication must be kept separate from other electric cables:
– Use separate cable trays
– Keep a distance between cables of at least 10 cm.

Mechanical Installation

1. Installation in the backside of the unit / backside of e-panel with provided rivets or screws (3 mounting holes provided)

Procedure:

• Remove CDU panel
  
• Mount the bracket with provided screws or rivets
• Fix the e-Box to the bracket (4 screws provided)
• Route and connect the provided Modbus and power supply cables to the CDU control panel
• Route and connect the evaporator controller Modbus cable to the Module controller
• Option: Route and connect the System Manager Modbus cable to the Module controller

Optional installation on the frontside (only for 10HP unit, just beside the CDU control panel, holes to be drilled)
Procedure:

• Remove CDU panel
  
• Mount the bracket with provided screws or rivets
• Fix the e-Box to the bracket (4 screws provided)
• Route and connect the provided Modbus and power supply cables to the CDU control panel
• Route and connect the evaporator controller Modbus cable to the Module controller
• Option: Route and connect the System Manager Modbus cable to the Module controller

Module Controller wiring

Please wire the communication cable from the top of the control bord to the left side. The cable comes along with the module controller.

Please pass the power cable through the insulation at the bottom of the control box.

Note:
The cables should be fixed with the cable ties and should not touch the baseplate to avoid water ingress.

Technical data

Dimensions
Units in mm

Spare parts

CO2 MODULE CONTROLLER UNIVERSAL GATEWAY

Operation

Display
The values will be shown with three digits.

	Active alarm (red triangle)
	Scan for Evap. controller is in progress (yellow clock)

When you want to change a setting, the upper and the lower button will give you a higher or lower value depending on the button you are pushing. But before you change the  value, you must have access to the menu. You obtain this by pushing the upper button for a couple of seconds – you will then enter the column with parameter codes. Find the parameter code you want to change and push the middle buttons until value for the parameter is shown. When you have changed the value, save the new value by once  more pushing the middle button. (If not operated for 10 seconds, the display will change back to showing the suction pressure in temperature).

Examples:
Set menu

1. Push the upper button until parameter code r01 is shown
2. Push the upper or the lower button and find that parameter you want to change
3. Push the middle button until the parameter value is shown
4. Push the upper or the lower button and select the new value
5. Push the middle button again to freeze the value.

See alarm code
A short press of the upper button
If there are several alarm codes they are found in a rolling stack.
Push the uppermost or lowermost button to scan the rolling stack.
Set point

1. Push upper button until display shows parameter menu code r01
2. Select and change par. r28 to 1, which defines the MMILDS UI as the reference set device
3. Select and change par. r01 to the required lower pressure setpoint target in bar(g)
4. Select and change par. r02 to the required upper pressure setpoint target in bar(g)

Remark: The arithmetic middle of r01 and r02 is the target suction pressure.
Get a good start
With the following procedure you can start regulation as soon as possible.

1. Connect the modbus communication to CDU.
2. Connect the modbus communication to evaporator controllers.
3. Configure the address in each evaporator controller.
4. Perform a network scan in the module controller (n01).
5. Verify that all evap. controllers have been found (Io01-Io08).
6. Open parameter r12 and start the regulation.
7. For connection to a Danfoss System Manager
   – Connect the modbus communication
   – Set the address with parameter o03
   – Perform a scan in the System Manager.

Survey of functions

Fault message
In an error situation an alarm symbol will flash..
If you push the top button in this situation you can see the alarm report in the display.
Here are the messages that may appear:

Menu survey

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