TP-5737 5/018 Section 2 Operation
2.7.1 Controls and Indicators
The following table describes the controls and indicators
located on the controller.
Name Description
AC ammeter The meter displays the AC output
amperage. Use the selector
switch to choose the phase
current.
AC voltmeter The meter displays the AC output
voltage. Use the selector switch to
choose the output lead circuits.
DC voltmeter The meter displays the voltage of
the starting battery(ies).
Alarm horn The 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 The 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 The lamp flashes or lights when
the controller detects a fault. See
the lamp conditions section
following.
Frequency meter The meter displays the frequency
(Hz) of the generator set output
voltage.
Generator set master
switch
The switch functions as the
controller reset and generator set
operation switch.
High engine
temperature lamp
The 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 The hourmeter records the
generator set total operating hours
for reference in maintenance
scheduling.
Lamp test switch The switch tests the controller
indicator lamps.
Low oil pressure
lamp
The 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 The lamp illuminates and cranking
stops if the engine does not start
after 45 seconds of continuous
cranking or 75 seconds of cyclic
cranking.
The cranking stops and overcrank
lamp lights after 15 seconds if the
starter or engine does not turn
(locked rotor).
The overcrank lamp flashes if the
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 The lamp illuminates if the
generator set shuts down because
governed frequency on 50 and
60 Hz models exceeds 70 Hz.
Water temperature
gauge
The gauge displays the engine
coolant temperature.
Oil pressure gauge The gauge displays the engine oil
pressure.
Scale lamps
(upper/lower)
The lamps indicate which AC
voltmeter and/or ammeter scales
to read.
Selector switch The switch selects the generator
set output circuits to measure.
When switched to a position with
two circuit labels, measure
amperage on the lead shown in
the upper label and measure
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
The potentiometer fine-tunes
(±5%) the generator set output
voltage.
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