Franklin-fueling-systems LS500 Auto Learn Line Leak Detection Installation Manual de usuario descargar pdf (Pagina 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, nd 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 Ofine Communication failure 

between the control 

module and the module 

ofine

Look at module LEDs Red, replace module. 

Green solid or ashing, power 

down the console and re-seat the 

module

Operating Alarms (Continued)

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Franklin-fueling-systems LS500 Auto Learn Line Leak Detection Installation Manual de usuario Pagina 21

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