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DCA-400SSV— OPERATION AND PARTS MANUAL — REV. #0 (04/19/06) — PAGE 21
1
DCA-400SSV— GENERATOR CONTROL PANEL
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.
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.
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:
■■
■■
■
Over-Current Relay
■■
■■
■
Voltage Rectifer (AVR)
■■
■■
■
Starter Relay
■■
■■
■
Current Transformer
■■
■■
■
Voltage Selector Switch
■■
■■
■
Three Phase Circuit Breaker
Remember the
overcurrent
relay
monitors the current
flowing 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 600 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).
NOTE