Bennett 3000 Series Service Manual page 63

Symptom
No Display
disconnected before it gets to the
No fuel coming out the of
the hose
Isolation valve in the piping system is
Troubleshooting
Possible Cause
Breaker Turned Off
Fuse Blown on CPU
Power Wire is broken or
pump.
Terminal Strip TS2
CPU
Submerged pump is off
Submerged pump is off
Submerged pump
Submerged pump
Shear valve is closed
Filter totally clogged
closed
Hose in wrong boot
Valve problem
Valve problem
Storage tank has no fuel
Valve Problem
Handle Switch Problem
Barrier or Barrier Cable
Check Valve
63
Corrective Action
Turn Breaker On
Test Fuse F1. If bad replace with good 3A slow blow. If good
continue.
Measure voltage on input terminal TS2 pins 1 and 2. If no
power, you have a wiring problem between the breaker
panel and the dispenser. If power measures good on TS2
and fuse F1 is good, make sure the Hot and Neutral going to
the input terminal strip TS2 are going to the correct
terminals. Refer to the installation drawing in the back of this
manual.
If this is a startup, and all the above checks have been
made, remove the quick disconnect terminal strip from the
board and inspect for damage. If necessary, replace the
terminal strip.
If this is a startup, and all the above checks have been
made, replace the CPU with a known good one. Also, check
for cross phasing before replacing CPU.
Turn on submerged pump breaker or relay box and retest.
Light on the submerged pump relay is on but pump power is
turned off. Turn on submerged pump power at breaker
panel.
Submerged pump has power but fails to operate. Trouble
shoot the submerged pump or check for closed valve in the
product pipe line
If the submerged pump is tied to an electronic leak detector,
maybe the electronic leak detector has the submerged pump
disabled due to an alarm condition.
Check the shear (impact) valve under the dispenser on the
product line that you are testing. Open valve and retest.
A lot of times a new site will have a lot of debris caught in a
new filter. Replace the filter and retest.
There may be an isolation valve in the submerged pump
manhole, or in the under dispenser piping sump. Open the
valve and retest.
Is the hose in the correct nozzle boot? Sometimes the hose
is hung up in the wrong nozzle.
Is the CPU addressed correctly if there is a pulse output
board installed? Refer to the Operators portion of this
manual for proper programming. Check mode 21.
Is the valve properly connected to the CPU? If this is a
Master / Satellite site, has the valve connection been moved
to the Satellite board for the Master? If not, move the valve
from the CPU connection J4 and connect it on the satellite
board J2 (make sure power is off to the dispenser before you
do this!)
Store Manager needs to order fuel
It is possible that the valve is bad, but, before you replace it,
make sure the cable from the valve is properly connected to
the CPU (or satellite board as previously discussed) and that
you run a voltage test as described in the "valve trouble
shooting " section.
Has the dispenser reset? If the dispenser has not reset,
make sure the handle is working. Run diagnostics mode 5 to
make sure the handle switch is functioning. The valve won't
open unless the dispenser has reset (all 888's at the
beginning of the sale)
If you've done all of the above and still the dispenser won't
reset check the cable going to or the barrier circuit itself.
Either of these could be interrupting the handle signal to the
CPU.
The check valve can be stuck shut. Replace the check valve
and retest.
107932 Rev G 4-24-17