Fault Finding Chart - Grundfos MAGNA UPE 2000 Series Montage- Und Betriebsanleitung

8. Fault finding chart

Before removing the terminal box cover, make sure that the electricity supply has been switched off
for at least 5 minutes.
The pumped liquid may be scalding hot and under high pressure. Before any removal or dismantling
of the pump, the system must therefore be drained or the isolating valves on either side of the pump
must be closed.
: Indicator light is off.
: Indicator light is on.
: Indicator light is flashing.
Indicator
lights
Fault
Green Red
The pump is not
running.
The pump is not
running.
The pump has
stopped due to a
fault.
The pump is run-
ning but is faulty.
The pump has
been set to stop
and is faulty.
Noise in the sys-
tem.
Noise in the
pump.
Note: The R100 can also be used for fault finding.
22
Cause
One fuse in the installation is blown/
tripped out.
The current-operated or voltage-
operated circuit breaker has tripped
out.
The pump may be defective.
The pump has been stopped in one
of the following ways:
1. With the button .
2. With the R100.
3. External on/off switch in position
off.
4. Via bus signal.
Electricity supply failure (e.g. under-
voltage).
Pump blocked and/or impurities in
the pump.
The pump may be defective.
The pump is faulty, but is able to
operate.
The pump is faulty, but is able to
operate (has been set to STOP).
Air in the system.
The flow is too high.
The pressure is too high.
Air in the pump.
The inlet pressure is too low.
Remedy
1. Replace/cut in the fuse.
2. Check that the electricity supply
falls within the specified range.
1. Cut in the circuit breaker.
2. Check that the electricity supply
falls within the specified range.
Replace the pump or call GRUND-
FOS SERVICE for assistance.
1. Start the pump by pressing
2. Start the pump with the R100 or by
pressing .
3. Switch on the on/off switch.
4. Start the pump via bus signal.
Check that the electricity supply falls
within the specified range.
Dismantle and clean the pump.
Replace the pump or call GRUND-
FOS SERVICE for assistance.
The pump is able to operate.
Try to reset the fault indication by
briefly switching off the electricity
supply or by pressing the buttons
or .
In the case of repeated faults,
contact GRUNDFOS SERVICE.
Vent the system.
Reduce the setpoint and possibly
change over to constant pressure.
Reduce the setpoint and possibly
change over to proportional pressure.
Vent the pump.
Increase the inlet pressure and/or
check air volume in the expansion
tank (if installed).
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