TP-6252 2/08
20 Section 2 Operation
Code Fault
Description
Check
AF
Auxiliary fault
input shutdown
Input from a customer-supplied switch that closes
when the fault is active. Shutdown occurs
0.3 seconds after the fault is detected and will not start
when the fault is active (input is grounded). This
protection becomes active 3 seconds after crank
disconnect.
Check the cause of the auxiliary fault.
HE
High engine
temperature
shutdown
Shutdown occurs if the engine coolant temperature
exceeds the maximum temperature for more than
5 seconds. This protection becomes active after the
engine reaches the crank disconnect speed.
Note:
The high engine temperature shutdown
functions only when the coolant level is in the
operating range.
Check for a low engine coolant level.
LOC
Loss of coolant
shutdown
Shutdown occurs 5 seconds after a loss of coolant
condition is detected. This protection becomes active
10 seconds after the engine has reached its stated
crank disconnect speed and remains active as long as
the generator run command is active.
Check for a clogged seawater intake or sea strainer.
Check for a damaged seawater pump impeller.
LOP
Low oil pressure
shutdown
Shutdown occurs if a low oil pressure condition exists
for more than 5 seconds. This protection 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
attempts.
Check the fuel supply and battery.
If there is no output voltage, check the line circuit
breaker. Also check for loose connections.
Contact an authorized distributor/dealer for service.
OF
Overfrequency
shutdown
Shutdown occurs when the governed frequency
exceeds 110% of the system’s frequency setpoint for
more than 5 seconds. This protection 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 115%
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
voltage regulator setpoint for more than 2 seconds.
Contact an authorized distributor/dealer for service if
problem continues.
UF
Underfrequency
shutdown
Shutdown occurs when the governed frequency falls
below 90% of the system’s frequency setpoint for
more than 5 seconds. This protection 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
voltage regulator setpoint for more than 10 seconds.
Reduce the load and restart the generator set.
Contact an authorized distributor/dealer for service if
problem continues.
SCF0 Controller error
Indicates a software or communication problem within
the ADC 2100.
Contact an authorized distributor/dealer for service if
problem continues.
Figure 2-5
ADC 2100 Fault Shutdown Codes
