MQ Power WHISPERWATT DCA125SSIU4F Operation Manual page 27

The definitions below describe the controls and functions
of the Paralleling Panel (Figure 12).
1. Panel Lights — For operation at night or in dark areas,
panel lights illuminate 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 trip 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 off mode by pressing the
"OFF" button. While in "OFF" mode, the "RESET" button
must be pressed to clear the E-STOP fault.
DCA125SSIU4F 60 HZ GENERATOR • OPERATION MANUAL — REV. #6 (05/12/22) — PAGE 27
PARALLELING PANEL (OPTION)
For units with manually operated breakers, the breaker
will need to be reset by toggling the handle down,
then turning back to the "ON" position. On models
with spring-charged breakers resetting the breaker is
not necessary.
6. Contactor Operation (Manual Mode) — 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 synchroscope 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 its contactor. Pressing the red
"OPEN CONTACTOR" button twice will immediately
open the contactor.