Danfoss AK-PC 551 User Manual

16 User Guide RS8GY302 © Danfoss 2015-06 AK-PC 551
Password Access code
The settings in the controller can be protected with three levels of access codes.
Level 1: End user settings, such as changing the weekly plan
Level 2: Adjusting installer level
Level 3: Conguration of system settings (conguration menu)
The access code is a number between 001 and 999.
Password level 1
Fac: 100
Password level 2
Fac: 200
Password level 3
Fac: 300
Real time clock Date and time
Used by weekly plan and alarm function.
Year, month, date
Hours, minutes
Weekly schedule Weekly plan
Set the opening and closing hours of the store here
The times can be used to change the regulation reference for suction pressure and for lower
fan speeds at night.
-
Monday open Time of opening, Monday
Hours, minutes
Monday close Time of closing, Monday
Hours, minutes
Tuesday op..... Times for remaining weekdays
-
Network Network
-
Modbus Address Set the address of the controller here if it is connected to a system device via data communi-
cation.
Min: 0 1
Max: 120
Fac: 1
Baudrate The controller only communicates with system devices that have this baud rate, e.g. AK-SM
850. The value must not be changed
Fac: 384
Serial mode The value must not be changed
Fac: 8E1
Reset to factory Return to factory settings
If this function is set to “YES”, all settings will be returned to factory default settings, and the
alarm list will be cleared.
I/O conguration
Here you can select functions for the individual inputs and outputs. To prevent faulty settings, only select functions that
have been set up via the conguration menus for the suction groups and the condenser.
For digital outputs, dene whether the function will be active for an activated or deactivated relay.
For digital inputs, dene whether the function/alarm will be active for an interrupted or shut-o switch.
For analogue outputs, dene whether the output signal should be 0-5 V or 0-10 V
For analogue inputs, dene:
Temperature sensors:
Normally, the sensor type is a Pt1000 model, but for digital scroll/stream discharge gas temperature monitoring, an NTC
86K@25°C can also be selected.
Calibration value (+/- 10°C)
Pressure sensors:
Signal type: 0-20mA, 4-20mA, AKS32 (1-5V) or AKS32R (10-90% ratiometric of 5 V supply voltage)
Minimum and maximum pressure range
Calibration value (+/- 5.0 bar)
If you have used “Quick congurations” or “Wizard” to set up the controller, the inputs and outputs will be automatically
set up (for additional information, see the “Quick conguration” or “Wizard” sections)
Limitations:
PWM outputs for digital scroll or stream compressors can only be selected on DO5 or DO6
Pressure transmitters with a current signal of 0-20 mA or 4-20 mA must be placed on analogue inputs AI1-AI4
Please note:
If a function has been connected to an input or output and is subsequently deselected in the conguration, the function
in question will be marked with an exclamation mark (!). In this case, you must either activate the function in the congu-
ration, or deselect the function on the input or output in question.
Digital outputs
1:
2:
3:
4:
.
.
8:
On/o outputs
When a function that needs to use an output is dened, it will be possible to select
this function on one of the available relay outputs.
Select a relay and continue with the setting. In the last setting you will have the option
of selecting the function you wish to connect to the relay and whether the function is to
be active when the relay is activated or deactivated. Attention! Relay outputs must not be
inverted at unloader valves. The controller inverts the function itself.
There will be no voltage at the bypass valves when the compressor is not in operation.
Power is connected immediately before the compressor is started.
If it is a function that requires frequent switching between on/o (e.g. unloader on a scroll
compressor, a Stream or a Bitzer CRII), use the solid state relay for this connection. There are
solid state relays on output numbers 5 and 6.
On
O
Digital inputs
1:
2:
3:
..
8:
On/o inputs
When a function is dened that uses an input, it will be possible to select this function
on one of the available on/o inputs.
Select an input and continue on into the setting. In the nal setting you will have be able
to select which function you wish to connect to the input.
On
O

Danfoss AK-PC 551 Specifications

General

Brand	Danfoss
Model	AK-PC 551
Category	Controller
Language	English