Northern Lights NL673L4, Operator'S Manual

Page: 15 / 54

ONL673L4 5/21
13
SHUTDOWNS AND ALARMS
1. Generator sets have shutdown systems to stop the
engine in the event of high water temperature or low
oil pressure.
Other alarms and shutdowns are available as
optional equipment.
NOTE: Do not rely on any shutdowns to the
exclusion of careful gauge monitoring. Watching
your gauges can prevent damage to the unit and
dangerous power losses.
2. Electronically-controlled generator sets will run
at reduced capacity when the Engine Control Unit
(ECU) detects a problem with one of its sensors.
These problems are indicated by a flashing trouble
code on the ECU warning light. For the NL676L4E,
see Figure 30 on page 28 for the meaning of different
codes.
3. Do the following when your warning or shutdown
system is activated:
a. Check the temperature gauge.
If above 230°F (110°C), shut
off the engine immediately.
b. Use the Trouble Shooting Guide on page 24 to
isolate the cause of the overheat.
CAUTION: Do not remove the water fill
cap of an overheated engine. Escaping high
temperature steam can cause severe burns.
Allow the engine to cool and then remove the cap
slowly using protective clothing.
c. Make repairs.
Restart your Industrial set after the temperature
gauge registers below 225°F (107°C).
d. Watch the temperature gauge regularly and
turn off the unit if the temperature rises above
230°F (110°C) on Industrial sets. Repeat trouble
shooting.
4. If shutdown is activated and the temperature gauge
shows temperature within normal temperature range:
a. Check the engine crankcase oil level.
b. If the oil level is low, fill with recommended
lubricating oil and restart. Watch the oil pressure
gauge carefully and shut off the engine if it does
not show a normal reading (20-60 PSI) after a
few seconds of operation.
c. If the oil level is normal, DO NOT restart the
engine. Call your dealer for assistance.
5. If the ECU is indicating a trouble code
a. Record the code and shut off the engine.
b. Refer to Figure 30 on page 28 and the DC
wiring diagram to determine the problem.
c. Repair the problem and restart the engine.
SPARE PARTS
1. NLI recommends that you keep the following
spare parts on hand for field service. The parts are
available from your local Northern Lights dealer.
2. All owners should have the following:
a. Primary and secondary fuel filter elements
b. Oil filters
c. Air filter
d. Alternator belt
e. Thermostat and gaskets
f. Glow plug
g. Injector and washer
3. If your set is operating a long distance from a
servicing dealer, add the following:
a. Complete set of injectors
b. Copper washers for injector change
c. Complete set of glow plugs
d. Fuel lift pump
Operating Procedures
Updated 11-26-13