TP-5867 11/02 31Section 5 Generator/Relay Controller Troubleshooting
Section 5 Generator/Relay Controller Troubleshooting
Use the following flow chart as an aid in troubleshooting
the main circuit board and the entire generator set. If the
prescribed remedy does not correct the problem,
replace the controller circuit board.
Engine cranks?
Yes
No
No
Check condition of
controller 10-amp fuse
Fuse okay?
No
Replace
fuse
Yes
Yes
D Check
condition/connections of
start/stop switch (N, 4, 47)
D Check battery condition and
connections
No
Yes
Is there voltage at the cyclic
crank relay or starter relay?
No Yes
Faulty relay.
Replace circuit board
D Load test battery
D Check starter and starter
relay (see Engine
Service manual)
Defective relay. Replace
circuit board.
Go to
A
Move generator set Master
Switch to RUN position
Fault shutdown relay LED lit?
Crank/flash relay LED lit?
Verify that the crank/flash relay
is energized by checking for DC
voltage at the cyclic crank relay
or starter relay with the Master
switch in the RUN position
Figure 5-1 Troubleshooting the Relay Controller Circuit Board (1 of 3)
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