Product Manual

TP-6804 6/15 75Section 6 Troubleshooting
Procedure to Reset the Thermostat
1. Disconnect the utility power to the generator by
opening (turning OFF) the corresponding circuit
breaker at the building’s distribution panel.
2. Disconnect the generator set engine starting
battery(ies), negative (--) lead first.
3. Open the enclosure roof and secure it with the roof
stay on the left side of the enclosure.
4. To gain access to the thermostat, remove the front
enclosure panel. See Figure 6-4.
a. Remove one screw near the controller area.
b. From inside of the enclosure, remove four nuts
that secure the front panel.
c. Lift the panel up and off.
5. Press the button on the thermostat to reset it.
6. Replace the front panel.
7. Reconnect the generator set engine starting
battery, negative (--) lead last.
8. Reconnect utility power to the generator set by
closing the circuit breaker in the distribution panel.
9. Reset the fault on the controller. Refer to Section
2.5 for instructions, if necessary.
1. Thermostat
2. Locations of nuts and screws that secure the front panel
GM93897
1
2
Figure 6-4 Thermostat Location, Model
20RESC/RESCL
6.6 Troubleshooting
Figure 6-5 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
displayisoff.
Low or no battery voltage. Check connections.
Check generator set battery. See Figure 6-5.
The generator
set does not
crank.
Battery weak or dead. Recharge or replace the battery.
Battery connections reversed or poor. Check the connections.
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 6.5.
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.