Kohler EKOZD Series Service page 253

0 if the system load is greater than or equal to the stop kW.
(The Total Capacity of Paralleling Bus is the sum of the
kW ratings of all the generators that are connected to the
paralleling bus).
The Time before a generator stops is the time required
to reach 100% at the given fill rate, or:
Time To Stop =
Stop Accumulator Fill Rate
13.5.8 Availability
An available generator needs to be able to supply power
to the load if Generator Management requires additional
capacity.
A generator is considered available if:
It does not have a preemptive warning or shutdown.
D
The Engine Control Switch is in Auto.
D
The Synch Mode in Auto is either Passive, Active, or
D
Dead Field.
The breaker can close (no faults or protective relays
D
active).
The Generator is sharing load (not in System Control
D
or Baseload mode, Load Enable is True).
Generator Management is Enabled.
D
13.5.9 Preemptive Warning
A preemptive warning is a warning that indicates the
potential of an impending failure before it actually
happens. The intent of preemptive warnings is to avoid
unintended overload conditions caused by a generator
tripping offline. Generator Management no longer
considers a generator available if it has a preemptive
warning (causing an additional generator to start if it is
available and necessary).
The following warnings are considered to be
preemptive:
Low Engine Oil Pressure Warning (This indicates that
D
the engine oil pressure is lower than normal. Possible
causes: bearing failure, bearing wear, oil pump wear,
oil temperature too high). Low Oil Pressure Shutdown
may occur shortly after this warning.
Note: If the low oil pressure warning is caused by over
temperature of the oil, starting an additional
engine may decrease the load on this generator
enough to lower the oil temperature to a
reasonable level.
TP-6953 7/19
100
Low Engine Fuel Pressure Warning (This indicates
D
that the engine is not receiving enough fuel. Possible
causes: day tank transfer pump failure, dip-tube
failure, lift pump failure, high pressure pump failure).
The engine may run out of fuel and disconnect on the
reverse power protective relay if this condition
continues.
High Engine Coolant Temperature (This indicates
D
that the engine is not able to cool properly. Possible
causes: low coolant level, water pump failure,
thermostat failure, radiator fin corrosion, high
temperature exchange fluid, exchange fluid path
obstruction, etc.).
Shutdown may occur if the condition continues.
Note: If an additional generator starts, the load on this
generator may decrease enough for the warning
condition to go away.
Failure to Synchronize Warning (This indicates that a
D
generator is trying to connect to the paralleling bus,
but is unable to hold synchronism long enough to
connect. Possible causes: erratic load on bus, engine
malfunction, incorrect synchronizing settings, etc.).
This generator may not be able to supply load, so
automatically start another one. If this one comes on
later, the other one can stop.
Water in Fuel Warning (This indicates that the fuel
D
supply has enough water in it to potentially cause
improper operation of the engine. Possible causes:
filters in need of replacement, contaminated fuel
received, water leaked into fuel supply due to
improperly installed fill caps, etc.). This generator
may stall if the water gets past the separator.
Note: Starting another generator may cause water to
infiltrate the fuel system of all generators, but the
water stored in the fuel/water separator will be
distributed across more engines, possibly
avoiding the stalling of all generators supplying
the load.
Fuel Tank Leak Warning (There is liquid in some
D
interstitial space between two bulkheads of the fuel
supply tank. Possible causes: rain infiltration, snow
melt, fuel spill, etc.). This generator may be stopping
due to a fuel tank leak shutdown, so automatically
start another generator to compensate for this one.
Loss of Fuel Warning (This generator has had a
D
significant loss of fuel over a short period of time.
Possible causes: sticking fuel float, vibration of fuel
tank, actual leak, etc.). This generator may shut down
due to the Loss of Fuel Shutdown, so automatically
start another generator to compensate.
Section 13 Generator Management Information
High Coolant Temperature
253