Danfoss AK-PC 351 User Manual page 8

Menu
Start/stop
Main switch
Extern Main swich
Plant type
Select Plant type
Refrigerant type
Unit of setpoints
Mains frequency
Alarm output
Suction
Control status
Control status
Actuel zone
Control temp. /
Control pres.
Reference
Running capacity
Requested capacity
8
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. (If an external main
switch has been defined, it must also be "ON" before regulating starts.)
External main switch
On DI6 an external switch can be connected which can be used to start and stop regulating.
If a switch is not connected, the input must be shorted.
Both the internal and external main switch must be ON before regulating starts.
Plant settings:
The following must be regulated:
• Compressor group
• Condenser group
• One compressor group + One condenser group
Refrigerant setting
Before refrigeration is started, the refrigerant must be defined. You may choose between
the following refrigerants:
R12, R22, R134a, R502, R717, R13, R13b1, R23, R500, R503, R114, R142b, user defined,
R32, R227, R401A, R507, R402A, R404A, R407C, R407A, R407B, R410A, R170, R290, R600,
R600a, R744, R1270, R417A, R422A, R413A, R422D, R427A, R438A, R513A (XP10), R407F.
Warning: Wrong selection of refrigerant may cause damage to the compressor.
Other refrigerants: Here Setting "user defined" is selected and then three factors - fac1, fac2
and fac3 and temperature glide (if necessary).
Define reference settings and readings for saturation temperature or pressure
Select pressure or saturation temperature.
(Can be set during initial set-up and must not be subsequently changed.)
Frequency
Set the net frequency
Alarm relay
Define an alarm relay here that will be activated in the event of an alarm.
1. Select the alarm priority that will activate the relay
• No relay
• Critical alarms
• Critical and serious alarms
• All alarms
Select whether the relay will be active (pulled) when the alarm is ON, or when it is OFF.
(If all relays are used to start/stop compressors and condenser fans, it will not be possible to
use an alarm relay.)
Regulation status
Read the status of the control circuit here e.g.:
No comp=no capacity available (error). Normal=regulation. Alarm comp=alarm situa-
tion where the compressor not starts. ON timer=await timer function. Start timer= await
timer function. Normal ctrl=regulation in neutral zone. Inj. ON delay=await time delay,
Cascade=slave or master. 1st comp. del=await first compressor timer. Pump down=suction
down until the set limit before compressor stops. Sensor error=emergency cooling due to
defective signal. Load shed=power limitation function is active. Sd High=temperature moni-
toring effect the regulation. Pc High= temperature monitoring effect the regulation. Manual
ctrl=manuel operation. Main switch off=regulation stops.
You will be able to see how the regulation is in relation to the reference here:
P0 error: No regulation
- Zone: The desired pressure is below the neutral zone
NZ: The pressure is in the neutral zone
+ Zone: The desired pressure is above the neutral zone
The current value of the regulation sensor can be read here
The total regulation reference can be read here
Here the connected capacity can be read as a % of total capacity
Here the preferred connected capacity can be read as a % of total capacity
User Guide RS8GZ302 © Danfoss 2015-06
SW: 1.1x
On / Off
Fac: None
Fac: None
Temp. / press
Fac: Saturated
50 Hz / 60 Hz
Fac: 50 Hz
DO-demand
Fac: No relay
AK-PC 351