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TP-6843 1/13 Section 2 Generator Set Operation 21
Figure 2-5 Controller Fault Messages
Enclosure
Intrusion Alarm
W The enclosure door is open. (Optional
communications kit required.)
Check for evidence of unauthorized
access to the generator set. Close
and lock the enclosure door.
Engine Oil
Pressure 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 4.
Check for leaks in the lubrication
system.
Check the oil level and add oil if the
level is low.
Fuel Pressure
Low
W The fuel pressure switch measures low fuel
pressure (below 4.5 inches water column).
(Optional communications kit required.)
Check fuel supply and fuel lines.
Engine Speed
High
SD * Engine speed exceeds 115% of the normal
running speed for more than 0.3 seconds.
Contact an authorized
distributor/dealer for service.
Exer Not Sch W Exercise not scheduled. No exercise is
scheduled on the controller.
See Section 3.6 for instructions to set
the exerciser.
Generator
VoltageL1-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.
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
Shutdown
SD Main power overload. An over current fault on the
controller 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.
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.
Reserve Oil
Empty
W The oil makeup kit reservoir bottle is empty.
(Optional communications kit and oil makeup kit
required.)
Add oil to the oil makeup kit reservoir.
Speed Sensor
Fault
SD Engine speed sensing has failed or engine
stalled.
Contact an authorized
distributor/dealer for service.
* Engine cooldown runs before shutting down.
Fault Message
Warning (W) or
Shutdown (SD) Condition Check