TP-6694 7/1842 Section 2 Operation
Metering Communications Loss. The fault lamp
illuminates red, the alarm horn sounds, and the unit
shuts down when the metering to controller
communication link is disrupted. The local display
shows MeterCommLos Shutdwn.
No Coolant Temperature Signal. The fault lamp
illuminates red, the alarm horn sounds, and the unit
shuts down when the engine coolant temperature
sender circuit is open. The local display shows Temp
Sig Loss Shutdwn.
No Oil Pressure Signal. The fault lamp illuminates red,
the alarm horn sounds, and the unit shuts down when
the engine oil pressure sender circuit is open for more
than 5 seconds. The local display shows Press Sig Loss
Shutdwn.
Overcrank. The fault lamp illuminates red, the alarm
horn sounds, and cranking stops when the unit does not
start within the defined cranking period. The local
display shows Over Crank Shutdwn. See Section 2.4.1,
Auto Starting, and Section 1.3.1, Status Event and Fault
Specifications for cyclic crank specifications.
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.
Overfrequency. The fault lamp illuminates red, the
alarm horn sounds, and the unit shuts down when the
frequency is above the overfrequency setting. The local
display shows Freq High Shutdwn. See Figure 2-4.
Overfrequency
Setting Range
Time Delay
Overfrequency
Default Setting
102%--140% of nominal 10 sec. 110% of nominal
Figure 2-4 Overfrequency Specs
Overvoltage (Each Phase). The fault lamp illuminates
red, the alarm horn sounds, and the unit shuts down
when the voltage exceeds the overvoltage setting for
the preset time delay period. The local display shows
Volts (L1--L2, L2--L3, or L3-- L1) High Shutdwn.See
Figure 2-5 for overvoltage specifications.
Note: Overvoltage can damage sensitive equipment in
less than one second. Install separate
overvoltage protection on online equipment
requiring faster than 2-second shutdown.
Overvoltage
Setting Range
Time Delay
Range
Overvoltage Default
Setting
105%--135% of
nominal
2--10 sec. 120% at 2 sec.
Figure 2-5 Overvoltage Specs
Run Relay Overload. The fault lamp illuminates red,
the alarm horn sounds, and the unit shuts down when
the controller smart switch that operates generator set
wire number 70 (Run) is overloaded. The local display
shows Run Relay Overload.
Underfrequency. The fault lamp illuminates red, the
alarm horn sounds, and the unit shuts down when the
frequency drops below the underfrequency setting. The
local display shows Frequency Low Shutdwn.See
Figure 2-6 for underfrequency specifications.
Underfreq. Setting
Range
Time Delay
Underfrequency
Default Setting
80%--95% of
nominal
10 sec. (short term) 90% of nominal
Figure 2-6 Underfrequency Specs
Note: The long-term shutdown occurs if the frequency
is 1 Hz or more below the system frequency for
60 sec. The long-term shutdown is not
adjustable.
Undervoltage. The fault lamp illuminates red, the
alarm horn sounds, and the unit shuts down when the
voltage drops below the undervoltage setting for the
time delay period. The local display shows Volts
(L1--L2, L2--L3, or L3--L1) Low Shutdwn.See
Figure 2-7 for undervoltage specifications
Undervoltage
Setting Range
Time Delay Range
Undervoltage
Default Setting
70%--95% of
nominal
5--30 sec.
80% of nominal at
10 sec.
Figure 2-7 Undervoltage Specs
(Voltage) Regulator Communications Loss. The
fault lamp illuminates red, the alarm horn sounds, and
the unit shuts down when the voltage regulator to
controller communication link is disrupted. The local
display shows RegCommLos Shutdwn.
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