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3.2 Fault correction procedure
The following fault correction procedure is based on indications by the green and red indicator lights on the
terminal box of the MAGNA Series 2000 pump. The next two pages give a complete overview of the possible
signal lights combinations. Remedy for some of the situations is further elaborated on the three next pages (
A1
,
A2
,
B1
,
B2
,
B3
,
C1
,
C2
).
Legend for signal lights:
= signal light is off.
= signal light is permanently on
= signal light is flashing
Signal lights
Description
Explanation
Remedy/reference
Green
Red
Pump is not running.
Voltage supply to pump has been cut off.
Re-establish correct volt-
age supply.
Normal operation
Pump is running.
1.
Normal operational state. The pump is keeping up
the pressure according to the setpoint set.
–
2.
Pump is running but not as the expected pump type.
Cause: Configuration error
Check the automatic con-
figuration of the terminal
box.
See
A1.
3.
Pump is running but making noise.
Cause may be:
- Air in the pump
- Inlet pressure too low.
Vent the pump.
Increase the inlet pressure.
4.
Pump is running at too low or high pressure.
•
Is the pressure set cor-
rect?
•
Check the external 0-
10 V signal.
See
A2.
Normal operational stoppage
Pump is not running.
Pump has been stopped...
-
by means of the operating button
-
-
via R100
-
-
via Grundfos GENIbus
-
-
by the pump start/stop function.
(Input on terminals STOP - is open meaning that
5 VDC can be measured across the terminals.)
-
Pump is not running.
Pump has been stopped due to:
1.
Supply voltage outside specified range - automatic
restart.
Re-establish correct volt-
age supply.
2.
Pump blocked or overloaded - manual restart.
Remove blockage/reduce
load.
3.
Frequent restarts -
manual restart after stop.
The pump starts and stops at short intervals until it
stops permanently.
Replace the terminal box.
4.
Fatal fault -
Cause may be:
- Terminal box defective
- Stator winding defective
Automatic and manual restart have been factory-set.
- Replace the terminal box.
- Replace the stator.
