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Dual Meter Switch Box (if applicable, Part # E2535-1)
PROBLEM:
Product flow does not register on Lap-Pad or REC display. (Units with POD type
pulser)
PROBABLE CAUSE:
Pulser shaft is not turning with product flow
Pulser Failure
SOLUTION:
1) In Mode # 1, select a product code and initiate a delivery. Do not flow product.
2) Remove the cover from the POD pulser assembly by rotating the cover counter-clockwise.
3) Remove the 3 phillips screws securing the pulser assembly and gently pull the pulser out,
taking care not to damage the attached wiring harness.
4) Manually spin the pulser shaft and monitor the REC display.
5) If the REC display counts, this may indicate a mechanical problem. Contact your local Liquid
Controls Service Center or the Liquid Controls Service Department for additional assistance.
6) If the REC display does not count, see PULSER FAILURE.
PROBLEM:
REC Counter display is blank
PROBABLE CAUSE:
9VDC Lithium Battery is low / dead
SOLUTION:
If the display goes blank during the first year of service, replace the display board( LC Part# 81277
) If the display goes blank after more than a year, replace the display board battery (LC Part#
71022)
PROBLEM:
“Pulser Failure” appears on Lap-Pad
PROBABLE CAUSE:
Missing pulse counts / excessive reversals
SOLUTION:
1)
Determine which meter is causing the problem.
Attempt to make a delivery for
products assigned to
both
Meter 1 and Meter 2. The Lap-Pad will show a failure for
the suspect meter.
2)
Isolate the Dual Meter Switch box
. After determining which meter is causing the
problem, isolate the Dual Meter Switch Box by removing the wiring harness ( grey / black
cable) from either the Meter #1 or Meter #2 position and plug the cable directly into the
Supervisory Console. To do this, first remove the grey / black cable from the back of the
Supervisory Console. Attempt to make a delivery. If the problem is corrected, replace the Dual
Meter Switch Box (Part # E2535-1).
3)
Check the pulser output
Select a product code in Mode #1 for the suspect meter. Remove the 12 bolts securing the
REC cover. Lift the cover and remove the coiled phone cable. Set the cover to the side, taking
care not to damage the phone cable connector. Using a reliable voltmeter, measure the
following DC voltages on the REC board (part # 81268)
Terminal # Voltage
J3 #19 +12.6VDC
J3 #18 +6VDC±.5 or 0VDC
J3 #17 +6VDC±.5 or 0VDC
If any of the readings below are observed, check for loose pulser wiring connections. If no loose
connections are found, replace the signal harness. (part # 81340)
TROUBLESHOOTING
