YZ Systems Milton Roy • 201 Ivyland Road • Ivyland, Pennsylvania • USA • 189743 • P: 281.362.6500 • www.yzsystems.com
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NJEX 610G / 610F ver.11-2023
Section 9: 610G / 610F System Troubleshooting
e. With the actuation gas line reconnected
to the pump, test stroke the pump.
Observe if there is an audible pump
stroke with the piston bottoming out and
returning to the top of the pump housing.
If an audible pump actuation is not
present, remove the actuation cylinder
and inspect for a broken return spring, or
a stuck / sticking plunger assembly.
Replace the spring if broken, clean and
relubricate the plunger assembly and
actuation cylinder. Make certain the seals
are not sticking to the plunger assembly.
8. If problem persists, contact YZ technical
service for additional assistance.
Troubleshooting: Flow Switch
1. Verify operating conditions. Correct as
needed.
2. Check that the pump is operating as ex
pected. If the pump is not stroking, see the
pump troubleshooting section.
3. If the pump is functioning as expected, go to
the Z-100 Controller terminal blocks and con-
nect a volt meter to terminals 4 and 5 to test
for continuity. Test fire the pump and the con-
nection will close momentarily if the flow switch
counted the pump stroke. If this does not read,
check the setting of the flow switch next.
4. The flow switch will come set at the factory,
but may need to be adjusted to measure
the flow at the exact application site. To
adjust the switch, use a hex key to turn the
set screw located on the flow switch body.
This will loosen the fit on the switch contact
and the contact will drop in the body. Adjust
the position of the contact and trigger another
pump stroke. Repeat as necessary until the
stroke is read by the controller. Tighten the set
screw to set the position.
5. If the flow switch is still not reading, please
contact YZ Technical Support for additional
help.