TP-6519 8/17 27Section 3 Troubleshooting
Problem ReferenceCorrective ActionTestPossible Cause
Cranks but
does not
start,
continued
Spark plugs or
spark plug
connections
Check spark plug wires and
connections.
Check spark plugs.
Tighten connections. Replace
spark plug wires if damaged.
Replace or clean and regap spark
plugs.
O/M
Loose connection
or open circuit
Check for loose or open
connection at the fuel valve (lead
70A) and at the engine spark
control module (leads IGN and
70A). Check controller/engine
wiring continuity.
Tighten connections.
Replace wiring if damaged.
Section 7
Air cleaner clogged Check for a dirty air cleaner
element.
Replace air cleaner element.
Check and replace air cleaner
element at the intervals shown in
the Service Schedule.
O/M
Magnetic pickup
Check for 1.75 volts or higher
from the magnetic pickup during
cranking. Test magnetic pickup
and check gap according to the
procedure in Section 5.9.4.
Tighten loose connections or
replace wiring as necessary.
Adjust magnetic pickup air gap if
necessary. Replace mag pickup if
necessary after testing.
Section 5.9.4
Measure the resistance across
the magnetic pickup according to
the procedure in Section 5.9.4.
Replace the mag pickup if the
resistance is outside of the
specified range.
Section 5.9.4
Incorrect controller
configuration
Check for correct controller
configuration parameters: unit
configuration (UC) and engine
configuration (EC).
Enter the correct controller
configuration parameters.
Section 4.5
Ignition system
spark control or
ignition coil
Test according to instructions in
the engine service manual.
Adjust or replace components as
indicated in engine service
manual.
Engine S/M
Digital spark
advance (DSAI)
leads incorrectly
connected or
disconnected
Check DSAI leads.
Check for loose connections.
Connect for natural gas.
Disconnect for LP.
Tighten connections.
Replace wiring if damaged.
Section 5.12.4
No engine rotation
sensed (check for
an overcrank fault
shutdown)
Check mag pickup. See Magnetic
pickup, above.
See Magnetic pickup, above. Section 5.9.4
Starts hard
Low battery voltage Check battery voltage during
cranking.
Check battery charger
connections, power supply, and
operation.
Charge battery. Replace battery if
necessary.
Tighten loose connections.
O/M
Air cleaner clogged Check for a dirty air cleaner
element.
Replace element. O/M
Fuel mixture
adjustment
incorrect
Use oxygen sensor to check fuel
mixture.
Adjust fuel mixture. Section 5.12
DSAI leads
incorrectly
connected or
disconnected
Check DSAI connection. Connect for natural gas.
Disconnect for LP.
Section 5.12.4
Spark plug(s) Check spark plug condition and
gap.
Replace or regap spark plug(s). O/M
Spark plug wire(s) Check spark plug wires and
connections.
Tighten connections. Replace
spark plug wires if damaged.
Engine S/M
* ADC-RES controller only. The DC-RET controller settings cannot be adjusted in the field.
W/D = Wiring Diagram(s) (Section 7) S/S = Generator Set Specification Sheet O/M = Generator Set Operation Manual
I/M = Generator Set Installation Manual Engine S/M = Engine Service Manual
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