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DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 25
1
DCA-125USJ (50 HZ)— ENGINE OPERATING PANEL
The definitions below describe the controls and functions of
the DCA-125USJ
(50 HZ)Engine Operating Panel
(Figure
7).
1. Panel Light – Normally used in dark areas or at night
time. When activated, panel lights will illuminate. When
the generator is not in use be sure to turn the panel
light switch to the OFF position.
2. Panel Light Switch – When activated will turn on control
panel light.
3. Oil Pressure Gauge – During normal operation this
gauge be should read between 35 to 65 psi. When
starting the generator the oil pressure may read a little
higher, but after the engine warms up the oil pressure
should return to the correct pressure range.
4. Water Temperature Gauge – During normal operation
this gauge be should read between 180° and 221°F.
5. Charging Ammeter Gauge – Indicates the current
being supplied by the engine’s alternator which provides
current for generator’s control circuits and battery
charging system.
6. Fuel Gauge - Indicates amount of diesel fuel available.
7. Tachometer – Indicates engine speed in RPM’s for 50
Hz operation. This meter should indicate 1500 RPM’s
when the rated load is applied. In addition a built in hour
meter will record the number of operational hours that
the generator has been in use.
8. Pre-Heat Lamp – As the engine cranks, this lamp will
illuminate to indicate automatic preheating of the engine.
When the lamp turns off, the engine has been preheated
and will start automatically.
9. Fuel Leak Detected Alarm Lamp – This lamp will
illuminate when a leak in the fuel tank containment
enclosure is detected.
10. Auto On/Off Engine Controller (MPEC) –
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.
A. 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 the
generator will monitor the AC line output from the
building's power source.
B. Low Oil Pressure – Indicates the engine pressure has
fallen below 15 psi. The oil pressure is detected using
variable resistive values from the oil pressure sending
unit. This is considered a
major
fault.
C. High Coolant Temperature – Indicates the engine
temperature has exceeded 239
°
F. The engine
temperature is detected using variable resistive values
from the temperature sending unit. This is considered
a
major
fault.
D. Overcrank Shutdown – Indicates the unit has
attempted to start a pre- programmed number of times,
and has failed to start. The number of cycles and
duration are programmable. It is pre-set at 3 cycles
with a 10 second duration. This is considered a
major
fault.
E. Overspeed Shutdown – Indicates the engine is running
at an unsafe speed. This is considered a
major
fault.
F. Engine Running – Indicates that engine is running at
a safe operating speed.
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.