Alpha Technologies AlphaGen 3.5_5.0kW Kohler COM5 - Manual (Page 20)

TP-6482 8/06 20 Section 2 Operation
2.3.6 Fault Shutdowns
The generator set shuts down automatically under the
fault conditions listed in Figure 2-9 and cannot be
restarted until the controls are reset.
Reset the
controller by placing either the remote control switch or
the generator set master switch in the STOP position.
The high engine temperature fault automatically resets
when the generator set cools.
Fault Description
High engine
temperature Shuts down 5 seconds after the fault. When the
engine cools, the fault clears and allows generator
set to be started without resetting the controller.
The high engine temperature shutdown does not
function during the first 30 seconds after startup.
Low oil
pressure Shuts down 5 seconds after fault. The low oil
pressure shutdown does not function during the
first 30 seconds after startup.
Note: The low oil pressure shutdown does not
protect against low oil level.
Overcrank Shuts down after 70 seconds of cyclic cranking.
The factory sets the circuit board for three starting
attempts: crank 20 seconds, rest 5 seconds, crank
20 seconds, rest 5 seconds, crank 20 seconds,
overcrank fault.
Overcrank shutdown also occurs in the case of a
locked rotor. Shuts down 1 second after the fault is
detected.
Overspeed Shuts down immediately if the engine speed
exceeds 3750 rpm.
Figure 2-9 Fault Shutdowns
2.3.7 Control Resetting Procedure
(Following Fault Shutdown)
Use the following procedure to restart the generator set
after a fault shutdown. Set either the remote control
switch or the generator set master switch to the STOP
position to reset the controls.
1. Move either the generator set master switch or the
remote switch to the STOP position.
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 locally by moving the
generator set master switch to the RUN position, or
move the master switch to the AUTO position and
start the generator set using the remote start
switch. Run the generator set to verify that the
cause of the shutdown has been corrected.
4. Move the generator set master switch to the STOP
position to stop the generator set.
5. Move the generator set master switch to the AUTO
position to return to standby operation.
2.4 Circuit Protection
A DC line limiter (fuse) interrupts the generator output in
the event of a 50% overload or a short circuit in the wiring
between the generator and the load. Replace the line
limiter if it blows. See Maintenance and Service Parts in
the Introduction of this manual for the fuse part number.