DCA220SSJU4F 60 HZ GENERATOR• OPERATION MANUAL — REV. #3 (02/10/17) — PAGE 25
The definitions below describe the controls and functions
of the Paralleling Panel (Figure 8).
1.
Panel Lights — For operation at night or in dark areas,
panel light illuminates paralleling panel for ease of
reading.
2.
Panel Light Switch — When activated will turn on
control panel light.
3.
Voltage Adjust potentiometer — The
voltage adjust
potentiometer
is a way to adjust the voltage up or
down for fine tuning. The adjustment sends a signal to
the controller to offset the system rated voltage (Trim
Voltage). It is important that all machines are set to the
same value when paralleling.
When first turning on the control power, the controller
will begin its boot sequence much like a computer
does. After completing the boot sequence the unit
will be ready to run or be placed in auto for auto start
applications.
4.
Control Power Toggle Switch — The control power
switch is a master power switch for the digital controller.
The control power switch has a latch feature that
prevents powering down control power while the engine
is running.
5.
Emergency Stop Button Switch — The Emergency
Stop pushbutton switch is used to stop the engine in
case of emergency or to lock out operation during
service. The emergency stop button
should not be
used for routine stopping of the engine
.
Actuation of the Emergency stop button while the
control power is on will illuminate the light on the button
as well as display “Emergency Stop” on the controller
display. Actuating the Emergency stop button will de-
energize all controller outputs and cause the engine
to stop as well as tripping the circuit breaker. This
condition is a latched condition that must be reset prior
to restarting the engine.
The procedure for resetting the emergency stop
requires several actions. Rotate the emergency stop
button to release the spring latch. To clear the latch,
the controller must be placed into the off mode by
pressing the “OFF” button. While in the “OFF” mode,
the “RESET” button must be pressed to clear the
E-STOP fault.
For units with manual operated breakers, the breaker
will need to be reset by toggling the handle down, then
can be turned back to the “ON” position. On models
with spring charged breakers resetting the breaker is
not necessary.
6.
Contactor Operation (Manual Mode) — The For
manual run applications, user action is required to get
the generator power to the output bus. Depending on
the model, some utilize contactors in series with toggle
handle circuit breakers and others have spring charged
automatic circuit breakers.
On the spring charged types, the buttons on the breaker
itself are not intended for circuit breaker operation.
For instructional purposes both will be referred to as
“contactor”.
There are two pushbuttons on the control panel for
controlling the contactor. There is a green “CLOSE
CONTACTOR” button to close the contactor and a red
“OPEN CONTACTOR” button to open the contactor.
These buttons illuminate to show the contactor status.
If the contactor is open, the red “OPEN CONTACTOR”
button will be illuminated. If the contactor is closed
the green “CLOSE CONTACTOR” button will be
illuminated.
These buttons can sometimes be multifunctional
depending on the situation. For stand-alone operation
the buttons simply close and open the contactor as
expected. For paralleling the buttons can act a little
different.
When the bus is already hot from another generator,
pressing the green online button will initiate a
synchronizing sequence before closing the contactor.
There will be an image of a synchro scope on the
controller display and when the voltage and phases
are matched, the contactor will close.
If there was already load on the bus the unit will slowly
ramp up load until it is sharing equally with the other
generator(s). While sharing load with other generators,
pressing the red “OPEN CONTACTOR” button once
will initiate a ramp down sequence. The unit will begin
to ramp down and when at a low level of load it will
automatically open it contactor. Pressing the red
“OPEN CONTACTOR” button twice will immediately
open the contactor.
PARALLELING PANEL (OPTION)
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