Manual

TP-6515 1/1120 Section 2 Operation
Code
Fault Description Check
AF Auxiliary fault
input shutdown
Indicates a shutdown initiated by pushing the emergency
stop switch. (TRES models only)
Not used on RES models.
Check the position of the emergency
stop button. (TRES models only)
HE High engine
temperature
shutdown
Shutdown occurs if the engine coolant temperature
exceeds the maximum temperature for more than
5 seconds. This function becomes active after the engine
reaches the crank disconnect speed.
Check for blocked air inlets and
exhaust outlets.
LOP Low oil
pressure
shutdown
Shutdown occurs if a low oil pressure condition exists for
more than 5 seconds. This function becomes active
30 seconds after the engine has reached crank disconnect
speed (30 second inhibit).
Note: The low oil pressure shutdown does not protect
against low oil level. Check the oil level at the engine.
Check for leaks in the lubrication
system.
Check the oil level and add oil if the
level is low.
OC
Overcrank
shutdown
Shutdown occurs after 3 unsuccessful starting attempts.
The crank cycle is set for three starting at tempts of 15
seconds cranking and 15 seconds rest.
Check the fuel supply, spark plug,
and battery.
Check for loose connections.
Contact an authorized
distributor/dealer for service if
problem continues.
Locked rotor The generator set also shuts down on OC if no engine
rotation is sensed during cranking. Shuts down 3 seconds
after the fault is detected.
OF Overfrequency
shutdown
Shutdown occurs when the governed frequency exceeds
110% of the system’s frequency setpoint for more than 5
seconds. This function becomes active 10 seconds after
engine start (10 second inhibit).
Contact an authorized
distributor/dealer for service if
problem continues.
OS Overspeed
shutdown
Shutdown occurs if the engine speed exceeds 110% of the
normal running speed for more than 0.3 seconds.
Contact an authorized
distributor/dealer for service if
problem continues.
OU Overvoltage
shutdown
Shutdown occurs if the voltage exceeds 120% of the
system nominal voltage for more than 2 seconds.
Contact an authorized
distributor/dealer for service if
problem continues.
UF Underfrequency
shutdown
Shutdown occurs if the governed frequency falls below
54 Hz for more than 5 seconds.
Shutdown also occurs if the governed frequency falls
below 56.5 Hz for more than 60 seconds.
This 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 if
problem continues.
UU Undervoltage
shutdown
Shutdown occurs if the 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 if
problem continues.
HB High battery
voltage warning
Fault code is displayed if the engine starting battery
voltage rises above 16 VDC for more than 30 seconds
when the engine is running. Not operative during the
engine crank cycle, this fault condition does not inhibit
engine starting.
The fault condition clears when the battery voltage returns
to an acceptable level.
Check the battery rating and
condition.
Check the battery charger operation.
LB Low battery
voltage warning
Fault code is displayed if the engine starting battery
voltage falls below 11 VDC for more than 30 seconds when
the engine is not running. Not operative during the engine
crank cycle, this fault condition does not inhibit engine
starting.
The fault condition clears when the battery voltage returns
to an acceptable level.
Check the battery rating and
condition.
Check the battery charger operation.
Charge or replace the battery.
Figure 2-5 ADC-RES Fault Codes