Alarm (3) - Grundfos Control Mpc Montage- Und Betriebsanleitung

8.4.7 Operation, pilot pump (2.1.4.7)
Operation, pilot pump
Description
The display is only shown in systems that have been configured
with a pilot pump.
You can set the operating mode to Auto or Manual.
Setting range
• Auto
In auto mode, the pump will be allowed to run and controlled by
the CU 352 and will start and stop according to the settings in
menu (4.3.2).
If Use as back-up pump is selected, the pilot pump will start
when all the main pumps are running 100 % and cannot be able
to maintain the setpoint.
• Manual
If manual operation is selected, it can be in the following modes:
- Max.: The pilot pump is running maximum speed.
- Min.: The pilot pump is running minimum speed.
- Normal: The pilot pump will run with the speed set in
Setpoint, manual operation.
- Stop: The pilot pump will be stopped.
Setting via the operating panel
• Operation > Further settings > Individual pump control >
Pilot pump.

8.5 Alarm (3)

This menu gives an overview of alarms and warnings.
You can reset alarms.
Related information
8.6.26 Soft pressure build-up (4.3.3)
8.6.56 Monitoring functions (4.4)
8.6.66 Pressure relief (4.4.8)
8.5.1 Alarm status (3)
Alarm status
Description
A fault in the system or one of the components monitored can
cause an alarm or a warning
the alarm and warning signal relay and the red indicator light on
CU 352, an alarm can also cause a change of operating mode,
for instance from Normal to Stop. A warning only causes a fault
indication.
The table shows the possible causes of fault together with an alarm
code, and whether they result in an alarm or a warning. It also
shows to what operating mode the system will change in case of
alarm, and whether restarting of the system and resetting of the
alarm is manual or automatic.
The table also shows that the reaction to some of the fault causes
mentioned can be set in the menu Settings. See sections Soft
pressure build-up (4.3.3) and Monitoring functions (4.4) to Pressure
relief (4.4.8).
Water shortage
Water shortage Stop
Pressure high Stop
Pressure low
Stop
. Besides the fault signal via
Manual/
X 206
automatic
Manual/
X 214
automatic
Manual/
X 210
automatic
Manual/
automatic
X 211
Manual/
automatic
27