TP-6774 2/14a58 Section 7 Controller
Fault Shutdowns
Code Description
Sensing
Mechanism
State(s)
Detected
Inhibit
Time
Delay
Time
Trip Point
Check
Frequency
Low
Shutdown
Underfrequency
shutdown occurs
when the governed
frequency falls
below the default
setting of the
system’s fr equency
setpoint.
Alternator
output
Post starting
aid, running,
cooldown
10 sec 10 sec AC
frequency
below 90%
of the
systems
frequency
Reduce the load and restart the
generator set.
Check P2 AC sensing connection at
the controller.
Contact an authorized
distributor/dealer for service if
problem continues.
Locked
Rotor
Shutdwn
Overcrank (locked
rotor) shutdown. A
locked rotor
condition
indicates that
there is no engine
rotation when the
starter is
engaged.
Frequency
over AC
voltage
Cranking 0sec 3sec 3sec.
Engine
speed is
below 10
rpm and the
oil pressure
is below
crank oil
pressure
(69 kPa)
Check for a locked rotor.
Contact an authorized
distributor/dealer for service if
problem continues.
Oil Pres Low
Shutdwn
Low oil pressure
shutdown occurs if
a low oil pressure
condition exists.
Note: The low oil
pressure shutdown
does not protect
against low oil
level. Check the
oil level at the
engine.
Analog or
digital input
Post starting
aid, running,
cooldown
1sec 10 sec At or below
117 kPa
Check for leaks in the lubrication
system.
Check the oil level and add oil if the
level is low.
Check the oil pressure sender
connections and operation.
Over Crank
Shutdwn
Overcrank
shutdown occurs
after 3
unsuccessful
starting attempts.
Fail to start ECM start,
starting aid,
cranking,
crank pause
0sec 7 sec on/
15 sec off
3 crank
cycles.
Controller
goes into
the cranking
state 3
consecutive
times
without
going into
post starting
aid
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 if
problem continues.
Sea Pressur
Low
Shutdwn
Low seawater
pressure
shutdown occurs
after a loss of
seawater
pressure is
detected.
Digital input Post starting
aid, running,
cooldown
10 sec 5sec Switch
closes
(shorted-to-
ground)
Check for a clogged seawater
intake or sea strainer.
Check for a damaged seawater
pump impeller.
Volts xx--xx
High
Shutdwn
Overvoltage
shutdown occurs if
the voltage
exceeds the
default setting of
the voltage
regulator setpoint.
Alternator
output
Post starting
aid, running,
cooldown
0sec 2sec xx--xx AC
voltage
exceeds
120% of
the AC
system
voltage
Check AC voltage.
Check wiring and connections.
Contact an authorized
distributor/dealer for service if
problem continues.
Volts xx--xx
Low
Shutdwn
Undervoltage
shutdown occurs
if the voltage falls
below the default
setting of the
voltage regulator
setpoint.
Alternator
output
Post starting
aid, running
cooldown
0sec 10 sec xx--xx AC
voltage
below 80%
of the AC
system
voltage
Reduce the load and restart the
generator set.
Check wiring and connections.
Check AC voltage and adjust if
necessary.
Separately excite unit.
Check stator continuity.
Check the F1 fuse.
Contact an authorized
distributor/dealer for service if
problem continues.
Figure 7-14 Advanced Digital Control IId Fault Shutdown
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