Franklin Fueling Systems TSP-LL2 - Manual (Page 8)

8
Troubleshooting
When troubleshooting a probe problem, it is important not
to presume any particular cause. Follow the steps outlined
below to properly and quickly troubleshoot probes:
Note: Do not start troubleshooting by swapping probes. It
may cause confusion in the process of identifying
the problem.
Float Missing:
1. Check programming of probe for correct number
of floats
2. Look for active High water or Float Missing Alarms
in the run status at the ATG.
3. If possible, have the technician stick the tank and
compare the measurement with the level reported
by the ATG.
4. Is the level correct? If not, is the ATG measuring
in reverse (the lower the actual product level the
higher it reads on the ATG)? Verify the Probe ratio
is programmed correctly. If programming is correct it
may be a probe issue, continue with the next steps.
5. Check the water level does the ATG list it as float
missing? If it is listed as missing, it could be a
probe issue, but again continue to troubleshoot.
6. Try to cycle power. If previously noted, check to
see if High water alarm or float missing alarm
changed from “ACTIVE” to “CLEARED”. If they
clear, again this could be a probe issue, but
acknowledge and continue to troubleshoot.
7. After completing the above steps, replace the
probe.
No Probe, Probe Sync and Unstable Probe
(New Install or Replacement Probe)
1. Check Wiring. Ensure that the Red, Black and
Shield wires are connected to the correct terminals
to the ATG. There should be two connections in
the junction box, (refer to figure 8).
(Probe Alarms on Multiple Channels or Only One Probe
Connected)
2. Check Main Board Power Supply. There should be
approximately 21 VDC loaded (probe connected)
and 24 VDC unloaded across the Red and Black
terminals of the probe channel in the ATG.
3. Check Field Wiring. Ensure that the voltage is
getting to the probe by checking at the junction box
splice or quick disconnect pigtail. With the pigtail
end facing you, keyslot up, there should be 24
VDC across the two bottom pins. Test field wiring
for a short or open.
4. Remake Splice. Cutback and remake the splice
connection in the junction box using the approved
seal pack and connectors.
(Quick Disconnect Pigtail)
5. Try a New Pigtail. If this probe has a quick
disconnect pigtail, try replacing it.
6. Try another Probe Channel. Once the field wiring
has been checked and the junction box connection
remade, try moving the field wiring to another
channel.
7. Connect the Probe Directly to the ATG. If possible,
bring the probe inside and wire directly to the ATG.
(If this probe has a quick disconnect pigtail then
the white wire should be connected to shield or
ground).
Listed below are additional steps for troubleshooting
the probe. For missing float or incorrect level problems,
consider the following actions:
• Pull probe from tank and manually raise and lower floats.
Does the ATG accurately report the change in level?
• Are the right number of floats installed on the probe
(verify number of floats programming)
• Is float too close to the end of the probe? (Was tank
overfilled or is the float stuck in riser)? If float is too close
to the probe head a float missing alarm will occur.
• Is there debris on the magnets? If so, clean debris from
magnet and check operation of ATG.
• Are the magnets cracked or broken? If so replace float
• Are the floats installed correctly? Product float on top,
closest to the probe head. Product float will have a white
collar. Water floats have colored collars (Red for use in
gasoline, blue for use in diesel)
• Is the probe shaft clean? If dirty use an abrasive pad to
clean the probe shaft.
• Check that wire connections from probe cable to field
wiring are good and dry.
• Are the floats compatible with the probe? LL and LL2
floats are NOT interchangeable.