Expanded Decision-Makerr 1 Controller; Generator Set Starting; Generator Set Stopping; Fault Shutdowns - Kohler 20-2250 kW Operation

2.4 Expanded Decision-Makerr 1
Controller
2.4.1

Generator Set Starting

Local Starting. Move the generator set to the RUN
position to immediately start the generator set.
Automatic Starting. Move the generator set master
switch to the AUTO position to allow startup by the
automatic transfer switch or the remote start/stop switch
connected to controller terminals TB1-3 and TB1-4.
Note: The controller allows up to 30 seconds of
continuous cranking before overcrank shutdown
occurs.
Note: The engine ECM may limit the crank cycle even if
the controller is set to a longer time period.
2.4.2

Generator Set Stopping

Local Stopping
1. Run the generator set at no load for 5 minutes to
ensure adequate engine cooldown.
2. Move the generator set master switch to the
OFF/RESET position. The engine stops.
Automatic Stopping
1. The automatic transfer switch (ATS) or other
device disconnects the load from the generator set.
2. The generator set continues to run for a preset time
if the ATS is equipped with an engine cooldown
time delay.
3. The ATS opens the connection between controller
terminals TB1-3 and TB1-4. The generator set
shuts down if the generator set master switch is in
the AUTO position.
2.4.3

Fault Shutdowns

The generator set shuts down automatically under the
fault conditions shown in Figure 2-3 and cannot be
restarted until the fault condition is corrected. Reset the
controller after a fault shutdown.
The fault lamp does not stay lit after the generator set
shuts down on a fault condition.
20 Section 2 Operation
2.4.4 Controller Resetting After a Fault
Shutdown
Use the following procedure to restart the generator set
after a fault shutdown.
1. Disconnect the generator set from the load using
the line circuit breaker or automatic transfer switch.
See the Safety Precautions at the beginning of this
section before proceeding.
2. Correct the cause of the fault shutdown. See the
Safety Precautions at the beginning of this section
before proceeding.
3. Start the generator set by moving the generator set
master switch to RESET/OFF and then to RUN.
4. Verify that the cause of the shutdown has been
corrected by test operating the generator set.
5. Reconnect the generator set to the load using the
line circuit breaker or automatic transfer switch.
6. Move the generator set master switch to the AUTO
position for startup by remote transfer switch or
remote start/stop switch.
Fault Description
High engine Shutdown occurs 5 seconds after the fault. The
temperature high engine temperature shutdown does not
function during the first 5 seconds after startup.
Note: The high temperature shutdown functions
only when the coolant level is in the operating
range.
Low coolant Shutdown occurs 5 seconds after the fault. The
level low coolant level shutdown does not function
during the first 5 seconds after startup.
Low oil Shutdown occurs 5 seconds after the fault. The
pressure low oil pressure shutdown does not function
during the first 5 seconds after startup.
Note: The low oil pressure shutdown does not
protect against low oil level. Check the oil level at
the engine.
Overcrank Shutdown occurs after 30 seconds of continuous
cranking. Shutdown occurs 30 seconds after
startup if there is no AC output.
Overspeed Shutdown occurs immediately when the governed
frequency on the 50 and 60 Hz models exceeds
70 Hz.
Figure 2-3 Fault Shutdowns
TP-6161 1/12