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TP-6804 1/15 27Section 2 Generator Set Operation
Fault
Warning (W) or
Shutdown (SD)
Condition Check
Frequency Low SD * Governed frequency falls below 90% of the
system frequency setting for more than
10 seconds, or 1 Hz below the system frequency
setting for more than 60 seconds.
Function becomes active 10 seconds after
engine start (10 second inhibit).
Reduce the load and restart the
generator set.
Contact an authorized
distributor/dealer for service.
Lo Crank Vlt W Low cranking voltage. Battery voltage falls
below 8 VDC for more than 6 seconds while the
starter is engaged.
Charge or replace the battery.
Locked Rotor SD No engine rotation is sensed during cranking.
Shuts down 3 seconds after the fault is detected.
Check the battery.
Check for loose connections.
Contact an authorized
distributor/dealer for service.
MainPwrOverL SD Main power overload. An over current fault on
the 70 controller power output (short circuit).
Contact an authorized
distributor/dealer for service.
Not in Auto W The generator set is not in Automatic (standby)
mode. Remote start and stop commands from a
transfer switch or remote switch will be ignored.
Press AUTO to place the generator
set in Automatic mode, when
appropriate.
Oil Press Low SD * The LOP switch indicates low oil pressure for
more than 5 seconds. Function becomes active
30 seconds after crank disconnect (30 second
inhibit).
Note: The low oil pressure shutdown does not
protect against low oil level. Check the engine
oil level regularly as recommended in Section 5.
Check for leaks in the lubrication
system.
Check the oil level and add oil if the
level is low.
Check the oil pressure switch and
wiring.
Over Crank SD Three unsuccessful starting attempts. Check the fuel supply, spark plug, and
battery.
Check for loose connections.
Contact an authorized
distributor/dealer for service.
Spd Sens Flt SD Engine speed sensor has failed or engine
stalled.
Contact an authorized
distributor/dealer for service.
Volts L1-L2
High
SD * Generator voltage high. Output voltage exceeds
120% of the system nominal voltage for more
than 2 seconds.
Contact an authorized
distributor/dealer for service.
Volts L1-L2 Low SD * Generator voltage low. Output voltage falls
below 80% of the nominal system voltage for
more than 10 seconds.
Reduce the load and restart the
generator set.
Contact an authorized
distributor/dealer for service.
* Engine cooldown runs before shutting down.
Figure 2-3 Controller Fault Messages