TP-6811 7/16 71Section 5 Troubleshooting
Reference
Corrective ActionPossible CauseProblem
Generator set
engine starts
hard.
Air cleaner clogged. Clean and/or replace the air cleaner. Generator set
operation manual
Weak battery.
Recharge or replace the battery.
Check for DC voltage on lead CHO to the
battery.
Check for 120 VAC on the black and white
leads to controller P5-1 and P5-3 for battery
charging.
Check 120 VAC utility power connection to the
generator set.
W/D Section 8
Poor battery connection. Clean and tighten the battery connections.
Spark plugs.. Regap or replace spark plugs. Section 2.6
Spark plug wire connection loose. Tighten the spark plug connections. Replace
wires if necessary.
Low fuel pressure. Check the fuel supply. Verify that fuel supply
lines and meters are sized to support all gas
appliances.
Section 5.5
Engine problem. Troubleshoot/service the engine. Engine S/M
Generator set
stops suddenly.
Low oil pressure shutdown. Check for oil leaks. Check the oil level and add
oil if necessary.
No fuel or inadequate fuel
pressure.
Check fuel supply.
Check fuel lines for restrictions or leaks.
Verify that fuel system is sized to supply all gas
appliances.
Section 5.5
Fault shutdown. Identify and correct the cause of the fault
shutdown. Then press OFF to clear the fault.
Section 5.7, Fault
Messages
Air cleaner clogged. Clean and/or replace the air cleaner. Generator set
operation manual
Engine overheated (hot engine).
Check air intake, oil level, air outlets. Generator set
operation manual
Check the coolant level.
Check the cooling fan fuses, relays, and
operation.
Check temperature sensors.
Section 4, Cooling
System
Section 6.7 and
Engine S/M
Engine overloaded. Reduce the load.
If the system is equipped with a load
management device, troubleshoot the load
management device.
—
Load management
device
documentation
Blown engine fuse(s). Replace the fuse.
If engine fuses blow repeatedly,
troubleshoot/service the engine.
Engine service
manuals
Remote stop command received
from a remote switch, ATS, or
OnCue
Plus.
Check the remote switch position.
Check the ATS/OnCue
Plus.
Loss of generator output voltage
to controller.
Check controller connections.
Check continuity of AC sensing leads 7 and 8
(1-phase) or 7--8--9 (3-phase).
W/D, Section 8
Engine problem. Troubleshoot/service the engine. Engine service
manuals
Note: I/M = generator set installation manual; O/M = generator set Operation Manual; S/M = service manual; W/D = wiring diagram.
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