10
User
Guide RS8KH202 © Danfoss 2019-03
AK-PC
572
Start/stop
Main switch
Main switch
Start and stop regulating here.
The configuration settings will require that regulating is stopped.
If you try to enter a configuration setting when regulating has started, the controller will
ask if regulating should be stopped.
When all settings have been made and the main switch is set to “ON”, the controller will
enable the display of the various measurements. Regulation will start. (One external main
switch must be “ON” before regulating starts.)
On / Off
Extern Main swich
Status on
External main switch
It is possible to connect an external switch which can be used to start and stop regulating.
Both the internal and external main switch must be ON before regulating starts.
If the external cutout is omitted, the dedicated input must be shorted.
Plant type
Select Plant type
Plant settings:
The following must be regulated:
• B HP
• MT + HP
Fac: None
Mains frequency
Frequency
Set the net frequency
50 Hz / 60 Hz
Fac: 50 Hz
Suction MT
Control status MT
Regulation status
Control status
Read the status of the functions in the control circuit here
Reference
The total regulation reference can be read here
ToMT temperature
The measured PoMT pressure converted to temperature can be read here
PoMT Pressure
The measured pressure for the PoMT pressure transmitter can be read here
Requested capacity
Here the preferred connected capacity can be read as a % of total capacity
Running capacity
Here the connected capacity can be read as a % of total capacity
No. of running comp.
The number of compressors in operation can be read here
MC PoMT offset
The size of a reference displacement on PoMT required from the system unit
(suction pressure optimisation function) can be read here
SdMT discharge
temp.
The measured discharge temperature can be read here
SsMT Suction gas
temp.
The measured suction gas temperature can be read here
Superheat MT
The actual superheat can be read here
Day / Night status
The status of the day/night function can be read here
Load shed
The status of the load shed function can be read here
HP Safety switch
The status of the security circuit can be read here
Injection ON MT
The status of the injection ON signal sent to the evaporator controllers can be read here
Liq. inj. suction line
The status of hte liquid injection in the suction line can be read here
MC Load Shedding
The status of the load shed signal received from the system device can be read here
MC Night Setback
The status of the night increase signal received from the system device can be read here
Control settings
Regulation settings
Control mode
Regulation type
The regulation is normally set to “Auto”, but it can be changed to “Off” or “Manual”.
MAN / OFF / AUTO
Fac: AUTO
Manual capacity
When setting to “Manual”, a forced capacity setting can subsequently be entered in %.
Min: 0 %
Max: 100%
Setpoint
Enter the set point for the regulation (regulation reference = set point + different offsets) here
An offset can originate from a night increase signal or from an override function on the
system device.
Min: -55°C
Max: 20°C
Fab: -10°C
PI control selection
Set how quickly the PI regulation must react here: 1 = slowly, 10 = very quickly.
Min: 1
Max: 10
Fab: 5
Menu
SW: 1.0x
