Troubleshooting
3A1827C
3
Troubleshooting
Problem
Cause
Solution
In an injector installation only, pres-
sure switch activates before all injec-
tors fire
Pressure switch is installed at the
wrong location
Verify pressure switch is correctly
installed - downstream from a bank of
injectors
Pressure switch is not set to a high
enough reset point
Verify pressure switch is set suffi-
ciently high at a level above the firing
point of the injectors and within the
margin for error.
Another pressure switch or pressure
gauge on the system reads different
than the pressure switch
Pressure switch is installed at the
wrong location
Verify pressure switch is correctly
installed - downstream from a bank of
injectors
Pressure switch is not set to a high
enough reset point
Verify pressure switch is set suffi-
ciently high at a level above the firing
point of the injectors and within the
margin for error.
After all injectors have reset, the
pressure switch does not deactivate
The Reset point is set too low
Turn the reset point to a higher set-
ting. Then verify the system is func-
tioning correctly.
The pressure switch seems to be
operating backwards
Normally Open and Normally Closed
outputs not completing connection
Check the Normally Open and Nor-
mally Closed outputs and make sure
the proper connection is made.
Adjust connection as needed.
Power is supplied to the pressure
switch but the switch is no longer
sensing pressure
Grease soap has accumulated in the
sensing orifice.
1.
Attempt to lower the pressure
switch set point to verify the
switch is not sensing any pres-
sure.
2.
After verifing the pressure switch
is not sensing pressure, remove
the switch from the port.
3.
Using a non-metalic tool, clean
out the sensing orifice.
4.
Reinstall the switch in the port.
5.
Retest.
