Line leak detector (lld) alarms – Franklin Fueling Systems TS 550 evo Fuel Management System Programming Guide User Manual

Page 47

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Displayed Alarm /

Warning

Device

Description

Recommended Actions

SN3 Pwr Short

Slot

3-Wire sensor malfunction.

If a 2-Wire sensor is used on a 3-wire module ensure that the 

red / pwr terminal is not used. If a 3-wire sensor is used, disconnect 

wires and see if alarm clears. If alarm clears inspect shorts in wiring. 

If alarm stays at PWR short replace module. Contact Franklin Fueling 

Systems’ Technical Services Dept. for support.

SN3 Sensor On

ChannelSN3 Discriminating sensor shows 

alarm status.

Inspect location for presence of liquid. In the case of a leak, follow 

site policy procedures. If no liquid is present, and alarm still exists, 

sensor may be tripped on error. Check wiring continuity from sensor 

to console. Test sensor at console, trip sensor on purpose. Verify 

console terminal wiring. If issue still exists, inspect wiring to probe. If 

the condition still exists, contact Franklin Fueling Systems’ Technical 

Services for support.

SN3 Sump Full

ChannelSN3 3-wire sensor detected sump full 

of liquid.

Inspect location for presence of liquid. In the case of a leak, follow 

site policy procedures. If in alarm with no liquid is present, sensor 

may be tripped on error. Check wiring continuity from sensor to 

console. 

SN3 Sync Error

ChannelSN3 3-wire sensor data signals not in 

sync with module.

Verify correct wiring and re-make the connections. Verify sensor type.

SN3 Vapor

ChannelSN3 3-wire discriminate sensor 

detecting vapors at location.

Visually inspect area for product presence. Verify the vapor level has 

been calibrated correctly.

SN3 Water

ChannelSN3 3-wire discriminate sensor 

detecting water at location.

Visually inspect area for water presence.

Line Leak Detector (LLD) Alarms

Displayed Alarm /

Warning

Device

Description

Recommended Actions

0.1 GPH Compliance

Expired

Line

A 0.1 gph test has not been 

completed within the last 365 

days.

Verify that no pertinent alarm conditions have been reoccurring. 

Ensure that there is enough time to pass the test.

0.2 GPH Compliance

Expired

Line

A 0.2 gph test has not been 

completed within the last 30 days.

Verify that no pertinent alarm conditions have been reoccurring. 

Ensure proper seating pressure. If Firmware revision is older 

than 1.7.4.5535, upgrade to make use of the Statistical Line Leak 

Detection enhancement.

3 GPH Compliance

Expired

Line

The required daily 3 GPH test has 

not been completed.

Check for continuous pump on conditions that could be caused by a 

sticky handle switch or relay.

Air in Line

Line

Air has been detected in the line.

Purge all air from the line starting at the furthest dispenser and 

working in toward the STP. Verify tightness of lines and investigate 

other sources for air infiltration.

Dispensing Pressure Test

Failed

Line

Pressure during dispensing 

dropped below 7.5 psi. This is 

seen as a catastrophic leak during 

dispensing.

Inspect all sumps for product. Use a pressure gauge to test line 

pressure during dispensing. See “LS500 Auto Learn Line Leak 

Detection Installation & User’s Guide” FFS 000-2145. Contact 

Franklin Fueling Systems’ Technical Services Dept. for support.

Extended Hook Signal

Line

A hook signal has been detected 

for more than 60 minutes with the 

line pressure staying the same.

Check for voltage to the AC-Input module. If issue still exists contact 

Franklin Fueling Systems’ Technical Services Dept. for support.

Failed to Catch Pressure

Line

The pump OFF pressure has 

dropped below 7 psi within 

1 second after the pump was 

turned off

Inspect all sumps for product. Refer to “LS500 Auto Learn Line 

Leak Detection Installation & User’s Guide” FFS 000-2145 for more 

information.

Failed to Pressure Up

Line

The Line has called for the pump 

to turn on but did not see the 

pressure increase

Inspect all sumps for product. Refer to “LS500 Auto Learn Line 

Leak Detection Installation & User’s Guide” FFS 000-2145 for more 

information.

Gross Leak Detected

Line

The console has detected a line 

leak greater than 3 gph.

Inspect all sumps for product. Refer to “LS500 Auto Learn Line 

Leak Detection Installation & User’s Guide” FFS 000-2145 for more 

information.

High Pump Pressure

Line

The Pump Off pressure has 

stayed above 49 psi for 3 

consecutive times.

Inspect all sumps for product. Ensure that no other check valves are 

used within the system. Observe multi-point line pressure readings 

during pump on and off using a pressure gauge in the line. If line 

pressure is high, there may be a blockage in the line. Refer to “LS500 

Auto Learn Line Leak Detection Installation & User’s Guide” 

FFS 000-2145 for more information.

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