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TP-7092 2/21 75Section 5 Troubleshooting
5.7 Troubleshooting
Figure 5-3 contains generator set troubleshooting,
diagnostic, and repair information. Check for loose
connections before replacing parts.
Troubleshooting Table
Problem Possible Cause Corrective Action
Controller
display
backlight is off.
Backlight turns off after about 1 minute with no
activity.
Backlight will turn on when a button is pressed or the
generator set starts.
Controller
display is off.
Low or no battery voltage. Check connections.
Check generator set battery. See Figure 5-3.
The generator
set does not
crank.
Battery weak or dead. Recharge or replace the battery. Make sure that the AC
power to the generator set controller is backed up by the
generator set.
Battery connections reversed or poor. Check the connections.
Emergency stop switch switch activated. Verify that it is safe to start the engine and apply load.
Then reset the stop switch or engine shutdown switch.
Fault shutdown. Check the controller display for fault messages. See
Section 2.5. Correct the fault condition and reset the
controller.
Generator set in the OFF mode. Press the RUN button to start the engine or press AUTO
to allow remote starting.
Generator thermostat tripped. Check for obstructed air inlets and outlets. Reset the
thermostat. See Section 5.6.
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 for oil leaks. Check the oil level and add oil if
necessary.
Fuel pressure insufficient. Check the fuel supply and valves.
Engine malfunction. Contact an authorized distributor/dealer.
No AC output.
Line circuit breaker in the OFF position. Place the circuit breaker in the ON position.
Line circuit breaker tripping because of
overload.
Reduce the load on the generator set by unplugging
non-essential appliances.
Line circuit breaker tripping because of short
circuit.
Contact an authorized distributor/dealer for service.
Auxiliary winding circuit breaker tripped. Reset the circuit breaker (located in controller’s service
access area). Contact an authorized distributor/dealer
for service if breaker trips repeatedly.
Low output or
excessive drop
in voltage.
Generator set overloaded. Reduce the load by unplugging non-essential
appliances.
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