Operating instructions

7-3
CONNECTION OF SERVICES
Troubleshooting
Vibration induced by road conditions can cause plumbing to loosen. Check for any system
components that are loose. Many symptoms can be resolved by simply tightening the hardware.
Failure to prime - motor operates, but no pump discharge - check:
• Restricted intake or discharge line.
•Air leak in intake line.
• Debris in pump.
• Punctured pump diaphragm (pump leaks).
•Crack in pump housing.
Motor fails to turn on - check:
• Loose wiring connection.
• Pump circuit has no power.
•Blown fuse.
• Pressure switch failure.
• Defective motor.
Pulsating flow - check:
• Restricted pump delivery. Check discharge lines, fittings and valves for clogging or
undersizing.
Pump fails to turn off after all fixtures are closed - check:
• Empty water tank.
•Insufficient voltage to pump (low battery).
• Punctured pump diaphragm (pump leaks).
•Discharge line leak.
• Defective pressure switch.
Low flow and pressure - check:
•Air leak at pump intake.
• Accummulation of debris inside pump and plumbing.
•Worn pump bearing (excessive noise).
• Punctured pump diaphragm (pump leaks).
• Defective motor.