Kohler 500EOZCS Operation page 55

High Generator Frequency. The fault lamp illuminates
red, the alarm horn sounds, and the unit shuts down
when the frequency is above the overfrequency setting.
See Figure 2-6.
Overfrequency
Setting Range
102%- 140% of nominal
Figure 2-6 Overfrequency Specs
High Generator Voltage (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. See Figure 2-7
for overvoltage specifications.
Note: Overvoltage can damage sensitive equipment in
less than one second.
overvoltage protection on online equipment
requiring faster than 2-second shutdown.
Overvoltage Time Delay
Setting Range Range
105%- 135% of
2- 10 sec.
nominal
Figure 2-7 Overvoltage Specs
High Lube Oil Temperature. The fault lamp illuminates
red, the alarm horn sounds, and the unit shuts down
because of high engine oil temperature. The shutdown
occurs 5 seconds after the engine oil reaches the
temperature shutdown range.
temperature shutdown does not function during the first
30 seconds after startup.
Locked Rotor (failed to crank). If none of the speed
sensing inputs show engine rotation within the preset
time delay of initiating engine cranking, the ignition and
crank circuits turn off for the preset period and the cycle
repeats. The fault lamp illuminates red, the alarm horn
sounds, and the unit shuts down after the second cycle
of the preset period of cranking.
Low Coolant Level. The fault lamp illuminates red, the
alarm horn sounds, and the unit shuts down because of
low coolant level. Shutdown occurs 5 seconds after low
coolant level is detected.
Low Engine Oil Level. The fault lamp illuminates red,
the alarm horn sounds, and the unit shuts down
because of low engine oil level.
requires an optional low engine oil level sensor for the
lamp to function.
TP-7126 5/20
Overfrequency
Time Delay Default Setting
10 sec. 110% of nominal
Install separate
Overvoltage Default
Setting
120% at 2 sec.
The high engine oil
This fault feature
Low Engine Speed. The fault lamp illuminates red, the
alarm horn sounds, and the unit shuts down immediately
when the governed frequency on 50 and 60 Hz models
drops below the under speed setting.
Low Fuel Level (diesel-powered models only). The
fault lamp illuminates red, the alarm horn sounds, and
the unit shuts down when the fuel tank level on
diesel-fueled models approaches empty.
requires an optional low fuel level switch for the lamp to
function.
Low Fuel Pressure. The fault lamp illuminates red, the
alarm horn sounds, and the unit shuts down when low
fuel pressure occurs. This fault requires an optional low
fuel pressure switch for the lamp to function.
Low Generator Frequency. The fault lamp illuminates
red, the alarm horn sounds, and the unit shuts down
when the frequency drops below the underfrequency
setting. See Figure 2-8
specifications.
Underfreq. Setting
Range Time Delay
10 sec. (short term)
80%- 95% of
60 sec. (long term)
nominal
Figure 2-8 Underfrequency Specs
Low Generator Voltage (Each Phase). 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. See
Figure 2-9 for undervoltage specifications
Undervoltage
Setting Range Time Delay Range
70%- 95% of
5- 30 sec.
nominal
Figure 2-9 Undervoltage Specs
Low Oil Pressure. The fault lamp illuminates red, the
alarm horn sounds, and the unit shuts down because of
low oil pressure. The shutdown occurs 5 seconds after
the low pressure condition is detected. The low oil
pressure shutdown does not function during first the
20 seconds after startup.
This fault
for underfrequency
Underfrequency
Default Setting
90% of nominal
Undervoltage
Default Setting
80% of nominal at
10 sec.
Section 2 Operation 55