TP-6953 7/19 47Section 2 Operation
Note: The controller is equipped with an automatic
restart function. When speed drops below 25 Hz
(750 rpm) while the engine is running, the unit
attempts to recrank. The unit then follows the
cyclic cranking cycle and, when the engine fails to
start, will shut down on an overcrank fault
condition.
Run Relay Coil Overload. The fault lamp illuminates
red, the alarm horn sounds, and the unit shuts down
when the current draw on the 70 wire from the controller
has exceeded 40 amps or has exceeded 10 amps for at
least 10 ms.
Starter Relay Coil Overload. The fault lamp
illuminates red, the alarm horn sounds, and the unit
shuts down when the current draw on the 71 wire from
the controller has exceeded 40 amps or has exceeded
10 amps for at least 10 ms.
Trip to Shutdown Delay The fault lamp illuminates red,
the alarm horn sounds, and the unit shuts down when
the generator is stopped if the circuit breaker has tripped
for a Protective Relay function, and the trip to shutdown
time delay has expired. This delay allows m itigation of
problem conditions without engine shutdown. If the
delay expires, it is presumed no successful action was
takenintheallottedtime.
2.6.7 Status and Notice Digital Displays
Warnings and shutdown faults appear on the digital
display under the Active Events menu and become part
of the event history. Beyond the warnings and
shutdowns there are several events which also appear
on the digital display under the Active Events menu.
Status is an event that is not an alert but is part of the
event history. Notice is an alert that is not part of the
event history.
The controller allows a selected number of changes by
the user for setting up the controller application which
are covered in this section.
Alarm Horn Silence. This status message indicates
whether the alarm horn can be silenced in any button
mode (OFF/RESET- AUTO- RUN) or requires the
AUTO button be pressed first compliant per NFPA 110.
Use SiteTecht software to change this setting. See
Section 2.6.8, Controller Resetting procedure, for
information on resetting the system.
The local display shows Alarm Silence: Always when
the alarm horn can be silenced with the master control
buttons in any position (default setting).
The local display shows Alarm Silence: Auto Only when
the alarm horn can be silenced only when in the AUTO
mode. The correct reset sequence requires pressing
the OFF/RESET button, then pressing the AUTO
button, and then pressing the ALARM SILENCE button.
Close Breaker. This notice message indicates that the
controller is attempting to close the circuit breaker (a
close command is being sent to the circuit breaker).
This notice only appears in paralleling applications
(where the bus sensing is connected to the bus side of
the paralleling breaker).
Contactor. This notice message indicates that the
controller wants to be connected to the paralleling bus.
If a contactor is used for paralleling, this output controls
it. This notice only appears in paralleling applications
(where the bus sensing is connected to the bus side of
the paralleling breaker).
Emergency Power System (EPS) Supplying Load.
This notice message indicates when the generator set
supplies more than 1% of the rated standby output
current.
Engine Cooldown (Delay) Active. This notice
message indicates that the delay for engine cooldown is
active where the generator set will continue to run after
the OFF/RESET button is pressed. The unit will
continue to run until the time delay times out.
Engine Start Aid Active. This notice message
indicates that the start aid is active and will energize an
engine equipped preheat or ether system during the
crank cycle. Use SiteTecht software to set up this
feature.
Engine Started. This status indicates that the
generator set start circuit is closed allowing the engine to
crank and run.
Engine Stopped. This status indicates that the
generator set start circuit is open causing the engine to
shut down.
Generator Running. This notice indicates that the
generator set has started and is running.
Load Priority # Shed. This status message indicates
thedigitaloutputforloadpriority#(1,2,3,4,5,or6)
shed is active (contacts closed), indicating the 1
st
,2
nd
,
3
rd
,4
th
,5
th,
or 6
th
priority load shed has been activated.
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