DCA800SSK2 60 HZ GENERATOR • OPERATION AND PARTS MANUAL — REV. #0 (09/03/09) — PAGE 19
GENERATOR CONTROL PANEL
Auto On/Off Engine Controller (MPEC) 14. — This
controller has a vertical row of status LED’s (inset), that
when lit, indicate that an engine malfunction (fault) has
been detected. When a fault has been detected the
engine controller will evaluate the fault and all major
faults will shutdown the generator. During cranking
cycle, The MPEC will attempt to crank the engine for
10 seconds before disengaging.
If the engine does not engage
(start) by the third attempt, the
engine will be shutdown by the
engine controller’s Over Crank
Protection mode. If the engine
engages at a speed (RPM’s)
that is not safe, the controller will
shutdown the engine by initializing the Over Speed
Protection mode.
Also the engine controller will shut down the engine in the
event of low oil pressure, high coolant temperature, low
coolant level, and loss of magnetic pickup. These conditions
can be observed by monitoring the LED status indicators
on the front of the controller module.
MPEC Control Switch — This switch controls the
running of the unit. If this switch is set to the OFF/RESET
position, the unit will not run. When this switch is set to the
manual position, the generator will start immediately.
If the generator is to be connected to a building’s AC
power source via a transfer switch (isolation), place the
switch in the AUTO position. In this position, should an
outage occur, the automatic transfer switch (ATS) will
start the generator automatically via the generator’s
autostart contacts connected to the ATS’s start contacts.
Please refer to your ATS installation manual for further
instructions for the correct installation of the autostart
contacts of the geerator to the ATS.
Low Oil Pressure — Indicates the engine pressure
has fallen below a safe operating level. The oil pressure
is detected using variable resistive values from the
oil pressure sending unit. This is considered a major
fault.
High Coolant Temperature — Indicates the engine
temperature has exceeded a safe operating level. The
engine temperature is detected using variable resistive
values from the temperature sending unit. This is
considered a major fault.
Overcrank Shutdown — Indicates the unit has
attempted to start a pre programmed number of timesand
has failed to start. The number of cycles and duration are
programmable. It is preset at 3 cycles with a 10second
duration. This is considered a major fault.
Overspeed Shutdown — Indicates the engine is running
at an unsafe speed. This is considered a major fault.
Engine Running — Indicates that engine is running at
a safe operating speed.
Located behind the generator control panel is the
Generator Control Box. This box contains some of the
necessary electronic components required to make the
generator function.
The Control Box is equipped with the following major
components:
OverCurrent Relay
Voltage Rectifi er (AVR)
Starter Relay
Current Transformer
Voltage ChangeOver Board
Three Phase Circuit Breaker
NOTICE
Remember the overcurrent relay monitors the current
fl owing from the U,V, and W Output Terminal Lugs
to the load.
In the event of a short circuit or over current condition,
it will automatically trip the 2500 amp main breaker.
To restore power to the Output Terminal Panel, press
the reset button on the overcurrent relay and place the
main circuit breaker in the closed position (ON).
