TP-6728 10/1132 Section 4 Troubleshooting
7. Repeat steps 4 through 6 to step through the last 20
faults. Press the Select button to return to the most
recent fault, if desired.
8. To exit, move the generator set master switch to the
OFF/RESET position.
4.4 Generator Set Troubleshooting
Figure 4-2 contains generator set troubleshooting,
diagnostic, and repair information. Check for loose
connections before replacing parts.
Problem Possible Cause Corrective Action
The generator set
does not crank
Battery weak or dead Recharge or replace the battery.
Battery connections reversed or poor Check the connections.
Controller fuse (F3) blown
Replace the fuse. Contact an authorized
distributor/dealer for service if fuse blows
repeatedly.
Relay interface board fuse (F2) blown
Engine fuse blown.
Generator set master switch in the OFF
position
Move the master switch to the RUN position.
The generator set
cranks but does not
start, starts hard,
lacks power, or
operates erratically
Air cleaner clogged Clean and/or replace the air cleaner.
Battery weak or dead Recharge or replace the battery.
Battery connection poor Clean and tighten the battery connections.
Spark plug wire connection loose Check the spark plug wires.
Low oil pressure shutdown Check the oil level.
Fuel pressure insufficient Check the fuel supply and valves.
Engine fuse blown. Replace the fuse. Contact an authorized
distributor/dealer for service if fuse blows
repeatedly.
Engine malfunction Contact the distributor/dealer.
No AC output
AC circuit breaker in the OFF position Place the circuit breaker in the ON position.
AC circuit breaker tripping because of overload Reduce the load on the generator set.
AC circuit breaker tripping because of short
circuit
Contact an authorized distributor/dealer for service.
Auxiliary winding fuse (F1) blown
Replace the fuse. Contact an authorized
distributor/dealer for service if fuse blows
repeatedly.
Engine fuse blown.
Low output or
excessive drop in
voltage
Generator set overloaded Reduce the load.
Generator set stops
suddenly
Low oil pressure shutdown Check the oil level.
Outoffuel Check fuel supply.
Overcrank shutdown Reset the controller. If the overcrank fault occurs
again, contact the distributor/dealer.
Controller fuse (F3) blown Replace the fuse. If the fuse blows again, contact
the distributor/dealer.
Overspeed shutdown Reset the controller. If the overspeed fault occurs
again, contact the distributor/dealer.
Generator set master switch in the OFF/RESET
position
Move the switch to the correct position (RUN or
AUTO).
Remote stop command received from a remote
switch, remote digital gauge, or ATS
Check the remote switch position.
Engine malfunction Contact the distributor/dealer.
Engine fuse blown. Replace the fuse. Contact an authorized
distributor/dealer for service if fuse blows
repeatedly.
Auxiliary winding fuse (F1) blown Replace the fuse. Contact an authorized distributor/
dealer for service if fuse blows repeatedly.
Figure 4-2 General Troubleshooting Chart
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