Resource Center

System Troubleshooting

Get Technical Support
Contact Us
Below is a symptom troubleshooting guide pulled from various system manuals. If this guide does not address the issues you are experiencing or if you need additional troubleshooting support, please fill out the troubleshooting form below or reach out by phone (+1-877-425-4239) during AXI International’s operating hours (Monday – Friday, 8am – 5pm EST) .

Fuel  Delivery:

No Fuel Delivery

  1. Pump does not run
  2. Pump is not primed
  3. Fuel supply line blocked
  4. Excessive lift
  5. Air leak in fuel supply to pump
  6. Intake or outlet valve closed
  7. Check valve installed backwards

Insufficient Fuel Delivery

  1. Air leak at inlet
  2. Defective pressure relief valve or check valve
  3. Excessive lift
  4. Pump worn
  5. Inoperative foot valve
  6. Piping improperly installed or dimensioned
  7. Primary filter/water separator plugged

Pump/Motor:

Rapid Pump Wear

  1. Worn pump/motor coupler
  2. Pump has been run dry or with insufficient fuel for extended periods of time
  3. Plumbing on inlet side not appropriately dimensioned

Pump Requires Too Much Power

  1. Liquid too viscous
  2. Bent pump shaft, binding rotor
  3. Misalignment of pump/motor coupler

Motor Does Not Turn Or Turns Intermittently

  1. Control power not available
  2. Supply voltage is too low and/or incorrect
  3. Motor thermal overload condition
  4. Pump failed and seized
  5. Motor failure

Pump Leaks Fuel

  1. Loose pump plumbing fittings
  2. Worn pump shaft seal
  3. Pump pressure relief valve failure
  4. Fuel leak elsewhere and fuel dripping or running towards the pump
  5. Excessive head from overhead storage tank
  6. Worn pump O-rings or seals

Pump Requires Frequent Re-Priming

  1. Inoperative foot valve
  2. Inoperative check valve
  3. Inoperative solenoid valve (optional)
  4. Pump cavitation
  5. Plumbing air leaks
  6. Lift too high
  7. Leaking pump seal

Alarms/Switches:

"HIGH VACUUM" Alarm Comes On With Clean Or New Filter Element Installed

  1. Heavily contaminated fuel/excessive water in tank
  2. Restriction in plumbing on inlet side too high
  3. Excessive lift
  4. Inoperative foot valve
  5. Inlet ball valve not fully open
  6. Suction line clogged
  7. Vacuum Switch adjustment may be needed

"HIGH PRESSURE" Alarm Comes On With Clean Or New Filter Element Installed

  1. Heavily contaminated fuel/excessive water in tank
  2. Restriction in plumbing on discharge side too high
  3. Head on discharge side too high
  4. Check valve stuck or defective
  5. Outlet ball valve not fully open
  6. Discharge line clogged
  7. Pressure Switch adjustment may be needed

"NO FLOW" Alarm Comes On Or Pump Requires Frequent Re-Priming

  1. Inoperative foot valve
  2. Inoperative check valve
  3. Inoperative solenoid valve (optional)
  4. Pump cavitation
  5. Plumbing air leaks
  6. Lift too high
  7. Leaking pump seal
  8. Pump’s internal bypass/pressure relief valve cracking pressure is under 30 PSI.
  9. Flow Switch adjustment may be needed

Float Switch Error

  1. Stuck float
  2. Missing float
  3. Wiring Disconnected

Misc.:

Noisy System Operation

  1. Insufficient fuel supply
  2. Air leaks in the inlet pipe
  3. Air in fuel on the suction side
  4. Pump and motor out of alignment
  5. Worn out spider coupling
  6. Pump coupler out of balance
All company names, logos, and brands are property of their respective owners. Use of these names, logos, and brands does not imply endorsement.
Copyright © 2020 AXI International | All Rights Reserved.
Do NOT follow this link or you will be banned from the site! linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram