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7. Control unit
The booster system incorporates a CU 323 control unit which enables manual setting and monitoring of the system.
Figure
9
shows the user interface for a system with four pumps.
CU 323
4
OFF
3
OFF
2
OFF
1
OFF
WS
RESET
7
Fig. 9
User interface of control cabinet and CU 323
Pos.
Buttons
1
On
Off
2
3
4
RESET
5
6
7
"Setpoint"
1___!
1___!
or "Setpoint"
E.St
8
OFF
On
0-N
bUS
LOC
10
On
AUTO
Off
14
AUTO
AUTO
AUTO
PT
5
system run
alarm
6
10
4
Description
[On/Off]: Changes the system operating mode between "Normal" and "Stop".
[Up]: Increases the setpoint value.
[Down]: Decreases the setpoint value.
[RESET]: Resets all alarms.
[>]: Changes the operating mode of the individual pumps between "AUTO" and "OFF". Each pump in
the system has an Auto/Off button.
Enables "Emergency/Normal" operation.
Note: If a pump is set to "Emergency" operation, it will run at 100 % speed, and the power supply to
CU 323 will be switched off. There is a delay of 30 seconds before the pumps are set to "Emergency"
operation.
Switches the power supply to the control cabinet on or off.
Shows the setpoint. After unlocking CU 323, the setpoint will flash.
Proportional-pressure control. "PPP" flashes for one second followed by the current setpoint for four
seconds. This function is only available for E-pump systems.
The tank symbol appears in tank-filling mode with float switches.
Alternates between the tank symbol and the setpoint in tank-filling mode with analog input.
External stop: Indicates that the system has been stopped externally via a digital input.
Indicates that the system has been set to "OFF".
Indicates that the system has been set from "OFF" to "On". "On" is only shown for 3 seconds after
which the setpoint is shown.
Indicates that the buttons on CU 323 have been locked automatically. To unlock the buttons, press
[RESET] and arrow up or [RESET] and arrow down simultaneously.
Indicates that the system is remotely controlled.
Local: Appears if attempts to change local settings are made while the system is remotely controlled.
CU 323
4
OFF
AUTO
3
OFF
AUTO
2
OFF
AUTO
1
OFF
AUTO
WS
RESET
12
13
On
1
Off
2
8
3
11
PT
9
15
system run
16
alarm
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