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The Digital outputs (D01/D02/D03) represent the following faults:
Digital
Output
Fault detected
D01
Fault detected by the controller refer to the checklist above. LED coding will describe fault found.
D02
Low water low level device (level switch in breaktank) has been activated.
D03
Fire Alarm device (system flow switch) has been activated.
System Operation problems can be diagnosed from the following checklist:
Fault
Possible cause(s)
Corrective Action(s)
Pump does not run when
“Test/Rest” button is
pressed for 3 seconds
1)
No electrical supply to
Pump/FireSAFE at home
control panel.
2)
Pump fuse blown.
3)
Controller fuse blown.
4)
Faulty Controller.
5)
Power wiring to pump.
A)
Check power LED ON on controller
front.
B)
Check Fault LED, refer to above
coding table.
C)
Check electrical supply to pump
D)
Contact your system
supplier/Grundfos Service for
remedial action.
Pump does not reach the
duty point but continues
to run.
1)
Not enough water getting to
the pump.
2)
Air trapped in pump and or
system.
3)
Small demand from system or
leak.
a)
Check suction isolating valve is
fully open.
b)
Bleed air from system and
pump.
c)
Check system for demand/leak.
d)
Contact your system
supplier/Grundfos Service for
remedial action.
Pump does not reach the
duty point while running
and shuts off.
1)
Pressure switch setting too
low
2)
Pressure switch fault.
3)
Wrong FireSAFE at home unit
specified/delivered
a)
Check settings of the pressure
switch are not too low.
b)
Replace pressure switch
c)
Check unit is suitable for duty
point required.
d)
Contact your system
supplier/Grundfos Service for
remedial action.
Pump delivers correct
pressure, but does not
stop with no demand.
1)
Pressure switch setting too
high
2)
Pressure switch fault.
3)
Demand from system/leak
4)
Pressure vessel settings (if
used)
a)
Check settings of the pressure
switch are not too high.
b)
Replace pressure switch.
c)
Inspect system.
d)
Check vessel pre-set pressure.
e)
Contact your system
supplier/Grundfos Service for
remedial action.
Fire mode engaged, pump
on but no sprinkler head
activated.
1)
Leak in system great enough
to cause pressure drop and
engage fire mode.
a)
Find and fix leak.
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