English (GB)
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14. Service, accessories, spare parts
The installation and/or use of such products may negatively alter
and thus impair the specified properties of the pump set. The use
of non-original spare parts and accessories renders any liability
on behalf of Grundfos for resulting damage null and void.
Any malfunctions which cannot be repaired should only be
corrected by Grundfos or authorised service partners.
If there is a malfunction, please provide a full description of the
malfunction so that the service technician can prepare and
provide the appropriate spare parts.
To place an order for service parts, please contact Grundfos.
Please inform us about the serial number of the pump set and
describe the specific part to be replaced. You find the technical
data for the system on the nameplates. See section
.
6. Engine does not
start.
a) Fuel valve closed.
Open the fuel valve.
b) Fuel pipe are incorrect connected
Check that supply and return pipe are connected
according to labels on the connection block.
c) No diesel fuel in the tank.
Fill tank with diesel fuel. Vent fuel system. See installation
and operating instructions for the diesel engine.
d) Fuel filter blocked.
Change fuel filter. See installation and operating
instructions for the diesel engine.
e) Air in fuel system.
Vent fuel system. See installation and operating
instructions for the diesel engine.
f)
Water in fuel or wrong fuel.
Drain fuel from the fuel tank. Fill with new fuel. Vent fuel
system. See installation and operating instructions for the
diesel engine.
g) Starter relay defective.
Replace the starter relay.
h) Insufficient power supply.
Check power supply to the control cabinet, batteries and
cables on the pump set.
i)
Incorrect electrical wiring
Check the main and signal cables between the engine
and controller.
j)
Pump blocked.
Remove the pump and repair if necessary.
k) Exhaust pipes blocked.
Remove foreign bodies from exhaust pipes.
7. Oil pressure is too
high or too low when
engine is running.
a) Oil filter blocked.
Replace the oil filter. See installation and operating
instructions for the diesel engine.
b) Water or fuel in the oil.
Change oil. See installation and operating instructions for
the diesel engine.
c) Oil level too low/too high.
Refill with oil or drain off oil. See installation and
operating instructions for the diesel engine.
d) Oil pump worn.
Replace the oil pump. Contact Grundfos.
8. Engine temperature
too high.
a) Insufficient coolant.
Refill coolant. See installation and operating instructions
for the diesel engine.
b) Diaphragm valve blocked or defective.
Clean or replace the diaphragm valve. As an emergency
measure, open the isolating valve of the bypass pipe.
c) Heat exchanger defective.
Replace the heat exchanger. Contact Grundfos.
9. Engine does not
reach rated speed.
a) Wrong speed setting.
Contact Grundfos.
b) Fuel filter partially blocked.
Change fuel filter. See installation and operating
instructions for the diesel engine
c) Air in fuel system.
Vent the fuel system. See installation and operating
instructions for the diesel engine.
d) Traces of water in the fuel.
Drain condensate from the fuel filter. See installation and
operating instructions for the diesel engine.
e) Turbocharger or intercooler defective (not all
models).
Replace the turbocharger or intercooler.
Contact Grundfos.
10. Battery voltage too
low.
a) Cell short-circuit in starter battery.
Replace starter batteries. See installation and operating
instructions for the controller.
b) Wiring of the battery charging circuit damaged
or insufficient terminal contact.
Check the wiring and replace if necessary.
Check terminal connections and tighten, if necessary.
c) Insufficient power supply to the control
cabinet.
Check the power supply.
d) V-belt tension too low.
Check the V-belt tension and correct if necessary.
e) Battery charger defective.
Replace the battery charger. Contact Grundfos.
11. Strong exhaust
colouring.
a) Dirty air filter.
Replace the air filter.
Fault
Cause
Remedy
Note
Spare parts and accessories not supplied by
Grundfos are not inspected or approved by
Grundfos either.
Summary of Contents for Fire NKF Series
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