TP-6109 6/03 9Section 2 Operation
2.6.1 Controls and Indicators
The following table describes the controls and indicators
located on the controller.
Name Description
AC ammeter Meter displays the AC output
amperage. Use the selector
switch to choose the phase
current.
AC voltmeter Meter displays the AC output
voltage. Use the selector switch to
choose the output lead circuits.
DC voltmeter Meter displays the voltage of the
starting battery(ies).
Alarm horn Horn sounds if any fault or
anticipatory condition exists.
Place the generator set master
switch in the AUTO position before
silencing the horn. See the
Controller Resetting Procedure
later in this section.
Alarm silence switch Switch disconnects the alarm
during service (place the generator
set master switch in the AUTO
position before silencing the alarm
horn). Restore the alarm horn
switches at all locations (controller,
remote annunciator, and
audio/visual alarm) to normal
positions after correcting the fault
shutdown to avoid reactivating the
alarm horn. See the Controller
Resetting Procedure later in this
section.
Auxiliary fault lamp Lamp flashes or lights when the
controller detects a fault. See the
lamp conditions section following.
Frequency meter Meter displays the frequency (Hz)
of the generator set output
voltage.
Generator set master
switch
Switch functions as the controller
reset and generator set operation
switch.
High engine
temperature lamp
Lamp illuminates if the generator
set shuts down because of high
engine temperature. Shutdown
occurs 5 seconds after the engine
reaches temperature shutdown
range.
Hourmeter Hourmeter records the generator
set total operating hours for
reference in maintenance
scheduling.
Lamp test switch Switch tests the controller indicator
lamps.
Low oil pressure
lamp
Lamp illuminates if the generator
set shuts down because of low oil
pressure. Shutdown occurs
5 seconds after the engine
reaches oil pressure shutdown
range.
Overcrank lamp Lamp illuminates and cranking
stops if the engine does not start
after 45 seconds of continuous
cranking or 75 seconds of cyclic
cranking.
Cranking stops and overcrank
lamp lights after 15 seconds if the
starter or engine does not turn
(locked rotor).
Overcrank lamp flashes if speed
sensor signal is absent longer than
one second.
NOTE: The generator set
controller’s automatic restart
function attempts to restart the
generator set if the engine speed
drops below 13 Hz (390 rpm).
Continued decreased engine
speed causes an overcrank
condition.
Overspeed lamp Lamp illuminates if the generator
set shuts down because governed
frequency on 50 and 60 Hz
models exceeds 70 Hz.
Water temperature
gauge
Gauge displays the engine coolant
temperature.
Oil pressure gauge Gauge displays the engine oil
pressure.
Scale lamps
(upper/lower)
Lamps indicate which AC
voltmeter and/or ammeter scales
to read.
Selector switch Switch selects which generator set
output circuits to measure. When
switched to a position with two
circuit labels, measures amperage
on the lead shown in the upper
label and measures voltage
between the two leads shown in
the lower label. The AC ammeter
and voltmeter function only with
the switch in the ON position.
Voltage adjustment
potentiometer
Potentiometer fine-tunes (±5%)
the generator set output voltage.
Fine adjustment (5%) of generator
output voltage level.
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