Liquid Controls FlightConnect 600 - Manual (Page 47)

47
troubleShootIng
problem probable cauSe SolutIon
“pulser failure”
appears on the
diagnostic ticket
or on the LCR 600
display.
These instructions apply
to LCR 600’s with internal
pulsers only. POD pulser
may have different
readings.
1.
2.
Missing pulse counts.
Excessive reversals.
Pulser faults generally
occur in a high
vibration environment.
Liquid Controls is
not responsible for
pulser failures caused
by excessive system
vibrations.
1. Using a multimeter, measure the following DC voltages
on terminal block J8, while J8 is connected to the circuit
board. Use terminal 37 as ground reference.
TERMINAL # VoLTAGE
J8 #32 +5 VDC
J8 #33 0 or +5VDC
J8 #34 0 or +5VDC
2. If the terminals show the preceding voltages, check for
loose pulser wiring connections. If no loose connections
are found, replace the encoder harness.
TERMINAL # VoLTAGE
J8 #32 0 VDC
J8 #33 +1-3VDC
J8 #34 +1-3VDC
4. If the LCR 600 still shows a pulser failure, insert a ticket
into the Epson printer and begin a fueling. With product
flowing through the flowmeter, measure the following DC
voltages on the terminal block.
TERMINAL # VoLTAGE
J8 #32 0 VDC
J8 #33 +1-3VDC
J8 #34 +1-3VDC
5. If the voltages shown below are observed, ensure that
the pulser shaft is rotating. Look for any mechanical
problems that may cause either the flowmeter or the
pulser shaft to lock up. If the Lap Pad continues to
indicate a pulser failure, replace the pulser (PN 82597)
TERMINAL # VoLTAGE
J8 #32 +5 VDC
J8 #33 0 or +5VDC
J8 #34 0 or +5VDC