TP-6071 3/0028 Section 6 Controller Troubleshooting
Check the oil level.
Repair/replace oil pump.
Use a mechanical gauge to
verify oil pressure. Does the
engine have proper oil
pressure?
Does the K5 relay LED
light after 5--10 seconds
of running time?
Yes
Does the K1
relay LED light?
No
Yes
No
Replace the circuit
board (inoperative K5
relay).
Does the low oil pressure
(LOP) safety shutdown
switch function?
No
Replace the LOP safety
shutdown switch.
Yes
No
Did the K4 relay LED light?
Replace the
circuit board
(inoperative K4
relay).
No
Do the local and
remote start/stop
switches function?
Replace the circuit
board (inoperative
K1 or K2 relay).
Yes
Replace the inoperative
start/stop switch.
No
Do the temperature
safety shutdown
switches function?
Replace the inoperative
temperature switch(es).
No
Yes
Yes
Yes
E
Replace the circuit
board (inoperative K1
relay).
Figure 6-9 Troubleshooting Relay Controller Circuit Board (5 of 5)
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