Gallagher PULSE Series - Dispenser will Deliver Fuel

SERVICING
116
PULSE Installaon, Commissioning and Servicing Manual - Revision 19
20.2 Dispenser Will Deliver Fuel
Fault Acon
(a) Continual clicking of nozzle. y Ensure pressure and flow rate meets pump
specifications, i.e. <40 L/min and <350 kPa.
y DEF: Check for blocked airway (see Servicing
- Section 2.3 Elaflex DEF Nozzles).
y Check nozzle tip for damage to airway.
(b) Dispenser delivers too slow,
single hose or grade.
Use Stack Test (see Servicing - Section 12.14
Hydraulic Stack Test - STACK / Section 14.2
Stack Menu - STK MENU) to check valve operaon:
y Slight buzzing to the hand indicates solenoid
operation.
y 38% should provide slow flow.
y ≈ 51% should provide high flow.
Inability to provide the expected ow rates at the
above sengs may indicate:
1. Supply issues outside the dispenser: blocked
filters, empty tanks, relay/submersible
issues.
2. Delivery issues within the dispenser: valve
blockage, diaphragm damage, solenoid
failure, nozzle blockage.
(c) Pump over-runs. This may be caused by sluggish closing of valves due
to obstrucons or presence of foreign maer, or
leaking valves due to internal damage.
y Perform a Stack Test (see Servicing - Section
12.14 Hydraulic Stack Test - STACK / Section
14.2 Stack Menu - STK MENU) to conrm
whether or not the solenoid valves are opening
and closing correctly.
y Check for obstrucons or presence of foreign
maer and remove using compressed air.
y Check the piston lip seal for wear and tear and
damage. Replace worn or damaged parts.
y Aer performing the rst two acons, carry out a
test delivery of a preset amount and see whether
an overrun sll occurs.
(d) Pump over-runs preset. y Ensure pressure flow and rate meets pump
specifications, i.e. <40 L/min and <350 kPa.
y See pump over-runs above.
(e) Frozen price display. y Unplug/replug price display ribbon cable,
then repower the dispenser.