Franklin Fueling Systems LS500 Auto Learn Line Leak Detection Installation & Users Guide - Manual (Page 21)

21
Catastrophic leak Investigate for leaks
Is the clamp valve down Look at the pressure gauge on
the needle valve kit for operating
pressure
Test Result Condition Possible Cause Resolution
Failed to catch
pressure
Pressure was less
that 12 psi after
programmed delay
when STP turned off
Check valve damaged Investigate, force a manual test
and observe pressure
Dispenser solenoid is still open
after hook signal is off
Dispense, release hook, keep
nozzle open
Catastrophic leak Investigate for a catastrophic leak
such as a pipe breaking
Sudden Pressure
Loss
Pressure dropped to
less than 5 psi
Catastrophic leak Monitor line pressure using a
pressure gauge, investigate for
leaks
Dispensing Pressure
Test Failed
Pressure dropped to
less than 7.5 psi while
dispensing
Monitor line pressure using a
pressure gauge, investigate for
leaks
High Pump Pressure Pressure was above
50 psi during the catch
pressure test 3 times
consecutively
Monitor line pressure using a
pressure gauge, investigate for
faulty check valve
Extended Hook
Signal
Hook signal was applied
for more than 4 hours
Dispenser hook signal on steady Verify that all handles are down,
test AC inputs to determine which
is giving a signal
Pressure Transducer
Fail
Communication failure
to transducer
Wiring Check wiring connections at the
console, junction box and quick
disconnect.
Transducer failure Direct connect, if still in alarm,
replace.
Air in line Console has Sensed
Line Pressure Variations
Line left open or air elimination
loop failing
Investigate, then Purge Line
Starting at the Furthest Dispenser
Not Enabled Line disabled Either manually, or by another
application shut the STP down
Check other alarms, find source of
interruption
Marginal Pass of
Gross Leak Test
Passing result of gross
test, but marginally
Line is not thermally stable Force a gross leak test
Pump Request
Ignored
STP did not turn on
when requested
Controller not functioning
System is busy
TPI problem
Check RS485 communication
STP is disabled by another
application
4-20 mA Input error Contact Technical Support
Module is Offline Communication failure
between the control
module and the module
offline
Look at module LEDs Red, replace module.
Green solid or flashing, power
down the console and re-seat the
module
Operating Alarms (Continued)