Owner`s manual

5
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
A. MOTOR DOES NOT 1. No electrical power to pump Check breaker, switchbox and wiring.
2. Temperature-limiting device Allow motor to cool. Temperature-limiting device will auto-
tripped matically reset.
3. Rotor or vanes jammed Remove coverplate and check for damage or obstruction.
B. MOTOR RUNS, BUT NO 1. Tank level low Add fuel to tank.
2. Clogged filter assembly Remove and clean filter assembly.
3. Clogged or broken suction pipe Remove pump and clear suction pipe, replace as needed.
4. Broken shaft key Replace shaft key. Check rotor or vanes for obstruction.
C. PUMP FAILS TO PRIME 1. Air leak in system Check for air leaks at all joints.
2. Bypass valve stuck open Remove bypass valve and clean or replace as needed.
3. Check valve stuck open Remove check valve and clean or replace as needed.
4. Rotor or vanes worn Check rotor and vanes for excessive wear.
D. LOW FLOWRATE 1. Low voltage Check incoming line voltage.
2. Clogged filter assembly Clean filter assembly.
3. Air leak in system Check for air leaks at all joints.
4. Bypass valve stuck open Remove bypass valve and clean or replace as needed.
5. Rotor or vanes worn Check rotor and vanes for excessive wear.
6. Outlet is blocked Check all accessories for blockage.
7. Clogged or broken suction pipe Remove pump and clear suction pipe, replace as needed.
E. MOTOR STALLS WHEN 1. Bypass valve stuck closed Remove bypass valve and clean or replace as needed.
2. Rotor or vanes worn Check rotor and vanes for excessive wear.
3. Low voltage Check incoming line voltage.
F. FUEL LEAKAGE 1. Threaded joint loose Check and reseal threaded joint.
2. Insufficient bolt torque Retighten bolts.
3. Lost or damaged O-rings Check O-rings for damage. Replace as needed.
4. Shaft seal worn or damaged Fuel leaking from drain hole indicates shaft seal needs to
be replaced.
G. MOTOR OVERHEATS 1. Pumping high viscosity fluids Pump only low viscosity fluids.
2. Clogged filter assembly Clean filter assembly.
3. Clogged or broken suction pipe Remove pump and clear suction pipe, replace as needed.
TROUBLESHOOTING
FLOW
NOZZLE IS CLOSED
RUN