Engine Protective Devices; Section 2 - Operation; Before Starting The Engine - Generac Power Systems 00941-4 Owners And Installation Manual

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1.4.5 HOUR METER
Indicates the time the engine-generator has operated,
in hours and tenths of hours. Use the hourmeter
along with the periodic maintenance schedule for the
generator set.
1.5

ENGINE PROTECTIVE DEVICES

This generator has a computer that monitors low oil
pressure, oil temperature, engine speed, and low
voltage output. This section discusses those protec-
tive devices.
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1.5.1 AUTOMATIC LOW OIL PRESSURE
SHUTDOWN
The engine is equipped with an oil pressure sensor
that shuts down the engine automatically when oil
pressure is too low. If the engine shuts down by itself
and the fuel tank has enough fuel, check the engine
oil level.
1.5.1.1 Initial Startup
During initial startup, a time delay built into the shut-
down control system allows oil pressure to build. The
delay allows the engine to run for about 10 seconds
before sensing oil pressure.
1.5.1.2 Sensing low pressure
If the system senses low oil pressure during opera-
tion, the engine shuts down. If the engine has not
been restarted after a low oil pressure shutdown, and
the low oil level has not been corrected, the engine
runs for about 10 seconds as described above, then
stops.
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1.5.2 HIGH TEMPERATURE SHUTDOWN
A temperature switch with normally-open (N.O.) con-
tacts is mounted near the oil filter. If engine tempera-
ture were to exceed a preset temperature, the switch
contacts close and the engine shuts down.
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1.5.3 OVERSPEED
If engine speed is increased manually (or otherwise)
beyond the control of the computer control system,
the computer disables the load capability of the gen-
erator and shuts down the engine.
Do not attempt to physically adjust or control
!
the engine speed. Equipment damage or per-
sonal injury may result.
Section 2 – Operation
IMPACT-36 plus II Recreational Vehicle Generator
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1.5.4 LOW VOLTAGE
The computer monitors the voltage output of the gen-
erator. If voltage sensors indicate that voltage has
dropped below a preset level, the engine will auto-
matically shut down. Once the unit has shutdown,
the computer is automatically reset when the engine
is restarted.
The computer allows for the low voltage output
that occurs during startup. A time delay that
allows the engine to start and warm up is pro-
grammed into the monitoring system.
Before restarting a generator that has been
!
shutdown, disconnect all loads the generator
might power by whatever means provided,
such as the recreational vehicle's main circuit
breaker.
2.1

BEFORE STARTING THE ENGINE

IMPORTANT: INSTRUCTIONS AND INFORMATION
IN THIS MANUAL ASSUME THE GENERATOR HAS
BEEN PROPERLY INSTALLED, CONNECTED, SER-
VICED, TESTED AND ADJUSTED BY A QUALIFIED
INSTALLATION TECHNICIAN OR INSTALLATION
CONTRACTOR.
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2.1.1 INSTALLATION
Generator installation must have been properly com-
pleted so it complies with all applicable codes, stan-
dards and regulations and with the manufacturer's
recommendations.
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2.1.2 ENGINE LUBRICATION
Have engine crankcase properly serviced with recom-
mended oil before starting. Refer to "Maintenance"
and "Specifications" sections for oil servicing proce-
dures and recommendations.
Any attempt to crank or start the engine
!
before it has been properly serviced with the
recommended oil may result in engine failure.
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2.1.3 FUEL SUPPLY
The engine must have adequate supply of proper fuel
to operate. Before starting, check that sufficient fuel
is available.
NOTE:
Generac ® Power Systems, Inc. 7