Veeder-Root PLLD Reference guide

Manual 577013-727 Revision B
PLLD/WPLLD
Alarm Quick Help

NOTICE
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warranties of merchantability and fitness for a particular purpose.
Veeder-Root shall not be liable for errors contained herein or for incidental or consequential damages in connection with the
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Veeder-Root reserves the right to change system options or features, or the information contained in this publication.
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For complete warranty, technical support, and additional product information, refer to your console’s Operator Manual.
 Veeder-Root 2000. All rights reserved.

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TABLE OF CONTENTS
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 1
Gross Line Fail Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2
Periodic or Annual Test Fail Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3
High Pressure Warning/Alarm (Pre 19) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4
Line Equipment Fault Alarm(Ver. 19 and Higher) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 5
Comm Alarm (WPLLD only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6
Continuous Pump On Warning/Alarm (Pre 19) / Continuous Handle Alarm (Ver. 19 and Higher) . . . . . Page 8
Fuel Out Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 9
Low Pressure Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10
Open Alarm (PLLD Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 11
Short Alarm (PLLD Only)(Pre 19 Only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 12
Periodic or Annual Test Warning (Pre 19) / Periodic or Annual Test Needed Warning (Ver. 19 & Higher) Page 13
Setup Data Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 14
APPENDIX A - TABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15
APPENDIX B - THEORY OF OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 16

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OFF
Related Documents
Refer to the following manuals for more detailed information:
577013-344 PLLD Troubleshooting Guide, or
577013-484 WPLLD Troubleshooting Guide
Prior to Troubleshooting
If the line leak system is installed into a FE Petro STP, be sure it
contains a check valve which is designed to support Veeder-
Root line leak applications. The line leak system will not work if
the correct valve is not in place.
If the line leak system is installed into a Red Jacket STP, the
functional element must be disabled and the relief venturi into the
siphon pipe must be free from blockage.
IMPORTANT
When measuring the pressure in the line for comparison with
pressure transducer readings, always install the pressure gauge
DOWNSTREAM of the Check Valve (such as at the emergency
shut-off valve). DO NOT measure pressure at the STP.
INTRODUCTION
WARNING
This system operates near highly combustible fuel
storage tanks.
Fire or explosion resulting in serious injury or
death could result if you do not follow these
warnings:
1. Before you perform any servicing, switch Off
power to the system, including console and STP.
2. To protect yourself and others from being struck
by vehicles, block off your work area during
installation or service.

2
GROSS LINE FAIL ALARM
This alarm occurs when a drop in pump-off line pressure, or low
pump-off line pressure is detected.
Probable Causes:
1. The line is leaking [inspect all visible areas of pipeline, dis-
penser piping, and STP for leakage].
2. The tank is empty.
3.Power tothe STP isswitched Off-PLLD ONLY.
4. Partially clogged functional element (R. Jacket STP)(Pre 19).
5. STP contactor relay not closing or relay sticking - PLLD ONLY.
6. Faulty check valve (FE Petro or SwiftCheck Valve); check relief
pressure; refer to Appendix A, Table IIon Page 15.
7. Line length or type programmed incorrectly in the console.
8. Packer-Discharge Seal leaking (Red Jacket STP) - replace
with the correct seal for your application.
9. Dispenseris leaking.External leaks (connections,filters, etc.),
or internal leaks (solenoid valves in dispensers leaking into
nozzle hose, blender valve leaking, etc.)
10.Air in the line (Pre 19).
11.Low or no STP pressure (bad STP, starting capacitor).
12.Incorrect wiring of pump control/transducer - PLLD ONLY.
13.No STP request signal from dispenser. Verify all dispenser
switches are recognized by the console when actuated.
Troubleshooting Guidelines:
Retestline to determine iffailure is repeatable oris intermittent. If
the test passes, the problem is intermittent. Items 4, 5, 6, 9, 12,
and 13 are the most common causes of intermittent failures. If
the line fails, close all dispenser emergency shut-off (‘crash’)
valves and retest. If the test passes, the leak is probably in the
dispenser(s).

3
Pump-on pressures indicate a Periodic (0.20 gph) or Annual
(0.10 gph) line leak test failure has occurred.
Probable Causes:
1. The line is leaking.
2. Check valve leaking
3. Packer -Discharge Seal (Red Jacket STP) - replace with the
correct seal for your application.
4. Dispenser is leaking. External leaks (connections, filters,
etc.), or internal leaks (solenoid valves in dispensers leak-
ing into nozzle hose, blender valve leaking, etc.)
5. The console is not programmed for the correct line length /
type.
Troubleshooting Guidelines:
a. Switch STP On and inspect all visible areas of pipeline, dis-
penser piping, and STP for leakage.
b. Check for dispenser solenoid valve leakage by squeezing
each nozzle with STP On and dispenser switched Off.
c. If dispensers are blenders,check for blend valve leakage by
looking for meter movement (no dispensing and STP On).
d. After making any necessary repairs to correct problems
identified in steps a - c, retest line to confirm failure: If it
passes, but no repairs were made, the problem is intermit-
tent. The most common intermittent causes are items 2 and
4. If it fails, close all dispenser emergency shut-off (‘crash’)
valves, and retest. If it fails, the most common causes are
items 1, 2, and 3. If it passes, the problem is in one of the
dispensers. Open the shut-off valves, one at a time, or to
save time, in groups, and continue testing until leakage
recurs to identify suspect dispenser.
Note: 0.20 gph tests take a minimum of 30 minutes and 0.1 gph
tests take a minimum of 45 minutes.
PERIODIC OR ANNUAL TEST FAIL ALARM

4
Excessive line pressure when STP is switched Off. Note: the
pressure thresholds vary; see Table I, Appendix A, Page 15.
Probable Causes:
1. Sticking/stuck relay (PLLD only).
2. Clogged functional element (Red Jacket STP).
3. Faulty pressure transducer.
4. Incorrectly adjusted check valve relief, or incorrect valve (FE
Petro STP).
5. Faulty check valve.
6. Functional element relief valve has not been disabled (Red
Jacket STP).
7. Vent closing screw on functional element not fully retracted.
8. STP is being switched On by another device not detected by
the console - e.g., Healy vapor recovery (PLLD only).
9. Bad PLLD Interface Module (PLLD only).
10. Cross-wired transducers (PLLD only).
11. Transducer incorrectly wired to wrong side ofSTP capacitor
(WPLLD only).
Troubleshooting Guidelines:
Switch On the STP for 10 seconds to pressurize the line. Shut
the STP Off, wait 5 seconds and measure the line side pump-off
pressure. It should be less than 27 psi. If it is, the problem is
intermittent, otherwise the problem is continuous. Items 1,5, 8,
and 10 are the most common causes intermittent failures. Items
1, 2, 3, 4, 6, 7, 9, 10, and 11 are the most common causes of
continuous failures.
HIGH PRESSURE WARNING/ALARM (Pre 19)

5
LINE EQUIPMENT FAULT ALARM (Ver. 19 and Higher)
The pressure monitors have determined that there is a fault with
the pressure measurement system.
Probable Causes:
1. Faulty Pressure transducer.
2. Faulty PLLD Interface Module.
3. Mis-wired transducers.
Troubleshooting Guidelines:
1. Turn Off power to the STP -WARNING! The pump must
remain Off for steps 2, 3, and 4 below..
2. Vent the product line to drop the line pressure to zero.
3. Reconnect the product line.
4. Restore STP power.
5. In the PLLD/WPLLD diagnostic menu, run the pressure mea-
surement offset test.
WARNING!: WPLLD turns On the pump to make a pres-
sure measurement. Make sure the line is reconnected
before running the test.
6. If the test result is greater than 5 psi, check the transducer wir-
ing. If the wiring is correct replace the transducer.
7 Following all repairs re-run the pressure measurement offset
test.
8 If the alarm is still active run a gross line test.

6
The WPLLD pressuretransducer transmits pressurereadings on
the 220 Vac STP power lines. The readings are transmitted in
short bursts (1/2 second) every eight seconds. After four min-
utes, the transducer stops transmitting. A WPLLD Comm Alarm
is posted when the transmission is not received or when noise
interferes with the reception.
PROBABLE CAUSES:
No transmission
1. No Power to the STP (circuit breaker Off).
2. STP contactor permanently stuck On.
3. Controller Module has blown fuse.
4. Controller Module faulty.
5. AC Interface Module faulty.
6. Bad connection from the 220 Vac line to the AC Interface
Module.
7. Comm Module faulty.
8. Bad connection between the AC Interface Module and
Comm Module.
9. WPLLD transducer faulty.
10. Field wiring to STP faulty.
11. STPs using different legs of 3-phase power.
Noise Interference
1. External device generating noise on the AC line (common
sources are neon signs, variable speed motors, and STP
contactors).
2. Signal strength adjustment incorrect (Refer to Manual
576013-923).
3. A sticking STP contactor on one of the lines.
COMM ALARM (WPLLD Only)

7
TROUBLESHOOTING GUIDELINES
Determining if the problem is noise related:
With all the STPs Off, examine the lights on the AC Interface
Module. If more than one light is lit, the problem is an external
device generating noise. Isolate the circuit that is generating the
noise by turning the station’s electrical breakers off one at a time
until no lights are lit on the module. Determine which device on
the circuit is generating the noise and remove or correct.
NOTE: Noise interference caused by 120 Vac devices drawing
less than 5 amperes can be reduced/eliminated by using a plug-
in noise filter, part number AF100, manufactured by Advanced
Controls Technologies (telephone [phone]).
Determining if the problem is transmission related:
Manually start a test on the line that has the Comm alarm. The
STP will be switched on for 10 seconds to pressurize the line.
Watch the lights on the AC Interface Module for a short burst of
data 8 seconds after the pump switches On:
•If no lights are lit, the transmission is not being received, indi-
cating a possible failed WPLLD transducer.
•If only one or two lights are lit, the problem is incorrect gain
adjustment.
•If three or more lights are lit, repeat the manual test but this
time watch the light on the WPLLD Comm Module. The light
should flash 8 seconds after the STP switches On. If it does
not, the Comm Module or the connection between the Comm
Module and AC Interface Module is bad.
COMM ALARM (WPLLD Only) - Cont’d

8
A continuous pump-in signal will activate:
(Pre 19)
• A Continuous Pump On warning after 8 hours and a Continu-
ous Pump On alarm after 16 hours, or
(Version 19 and higher)
• A Continuous Handle alarm.
Probable causes:
1. Dispenser switch is continuously On - verify that all dis-
penser switches are Off.
2. Excessive dispenser leakage voltage - measure pump-in
voltage with all dispensers switched Off; a reading >30 Vac
indicates excessive leakage. Install an isolation relay
between the dispenser and the PLLD Controller Module
(reference Manual 577013-344).
3. Dispenser internal board is faulty, or possibly a bad dis-
penser switch - switched Off, but it is still On.
Continuous Pump On Warning/Alarm (Pre 19) / Continuous Handle Alarm (Ver. 19 & Higher)

9
This alarm occurs when the fuel level is below 10 inches and a
gross line test has failed. The alarm will clear when the fuel level
exceeds 10 inches.
NOTE: The fuel level does not include the programmable tilt
value and may therefore be different from the height reading dis-
played.
FUEL OUT ALARM

10
This alarm indicates a Low Pressure condition was detected
while dispensing. The low pressure threshold is programmable
from 0 - 25 psi (a low pressure threshold of 0 disables the low
pressure monitor).
Probable causes:
1. Large line leak (inspect visible areas of piping, dispensers,
and STP)
2. Tank is empty.
3. Low or no STP pressure (bad STP, starting capacitor).
4. Failed STP contactor relay.
5. Power to the STP is switched Off.
LOW PRESSURE ALARM

11
OPEN ALARM - PLLD ONLY
When the pressure transducer is not connected to the PLLD
Interface Module the pressure reading is negative. Note: Diag-
nostic screen will display 0 when pressures are negative.
Probable Causes:
1. Open condition in the field wiring.
2. Incorrect field wiring.
3. Reversed wiring on transducer.
4. Bad transducer.
5. Bad PLLD Interface Module.

12
This alarm occurs when the pump-On and pump-Off pressures
are reading the same value and are within the range of 5 to 15
psi.
Probable causes:
1. STP did not switch On.
2. Low STP pump pressure.
3. Bad transducer.
4. Bad PLLD Interface Module.
SHORT ALARM - PLLD ONLY (Pre 19 Only)

13
Periodic or Annual Test Warning (Pre 19) / Periodic or Annual Test Needed Warning (19 & Higher)
The system failed to complete or pass a Periodic (0.20 gph) or
Annual (0.10 gph) test in the programmed number of days.
Probable Causes:
1. There are Periodic or Annual test failures [Check test history
to determine if tests are failing; if they are, follow procedures
in Periodic or Annual Test Fail alarms (Page 3)].
2. Pump-on pressure readings <22 psi.
3.(Ver 17 & 18only)
Active High Pressure Warning or Alarm: follow procedures
on Page 4 to correct the High Pressure condition.
(Ver 19 and higher)
The line is not venting when the pump is shut Off. There
should be at least a 2 psi difference between Pon and Poff.
Print out the 0.2 or 0.1 diagnostic. The No Vent test aborts
message X out of 10 tests, indicates how many tests have
been aborted due to a non-venting problem. Check for
stuck relay, Functional Element not diabled (Red Jacket),
incorrect Check Valve (FE Petro), or incorrectly adjusted
Check Valve (FE Petro).
4. Active Continuous Pump Warning/Alarm or Continuous
Handle Alarm.
5. If the site is extremely busy, especially if blenders are
present, there may not be sufficient idle time to complete a
Periodic or Annual test unless the station is shut down.

14
This alarm occurs when an error has been made in program-
ming. In Version 17 and later, this will also occur if the line length
has not been programmed. The line length default is 501 feet
and will cause a SETUP DATA WARNING if the Service Contrac-
tor does not enter the line length.
NOTE: The default line type is set to FLEX A (white Envirof-
lex PP1501). If the actual line type is not FLEX A, and the
Service Contractor does not select the correct line type, the
result may be a GROSS LINE FAIL.
SETUP DATA WARNING

15
TABLE I - High Pressure Thresholds & Warning/Alarm
Software Version High Pressure Limit
15 40 psi warning
50 psi alarm & shutdown
16 A & B 40 psi warning
50 psi alarm & shutdown
16 C 29 psi warning
30 psi alarm & shutdown
17 & 18 30 psi warning
40 psi alarm & shutdown
19 Not Applicable
TABLE II - Typical Line Pressure
STP Status Pressure Range Gauge vs. Console
Off 17 - 25 psi ±5 psi
On >25 psi ±5 psi
APPENDIX A - TABLES

16
PLLD 3.0 gph Test Protocol
1. The 3.0 gph lineleak test is performed immediately after the
last dispense cycle has been completed.
2. The STP remains running for approximately 10 seconds to
pressurize the line.
3. The STP is then switched Off.
4. Wait a certain number of seconds to allow the line to vent
down to the check valve’s relief pressure. The time varies
with line length and line type.
5. Take the first pump-off pressure reading (P1). If P1is less
than 12 psi, a GROSS TEST FAIL alarm is posted and the
test is complete.
6. Wait a pre-determined amount of time (varies with line
length and type -
from 5 seconds to several minutes
) to
allow the line to lose pressure if a leak exists.
7. Take the second pump-off pressure reading P2.
8. Compare the drop from P1to P2, if it exceeds the 3 gph
threshold, the test is repeated. If it fails again, a GROSS
TEST FAIL alarm is posted and the test is complete.
APPENDIX B - THEORY OF OPERATION

Manual 577013-727 Revision B