Product Manual A

5
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
A. MOTOR DOES NOT 1. No electrical power to pump Check breaker, switchbox and wiring.
RUN
2. Auxiliary temperature-limiting Allow motor to cool. Auxiliary temperature-limiting device will
device tripped automatically reset.
3. Rotor or vanes jammed Remove coverplate and check for damage or obstruction.
B. MOTOR RUNS, BUT 1. Tank level low Add fuel to tank.
2. Clogged lter assembly Remove and clean lter 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 lter assembly Clean lter 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. Insufcient 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 uids Pump only low viscosity uids.
2. Clogged lter assembly Clean lter assembly.
3. Clogged or broken suction pipe Remove pump and clear suction pipe, replace as needed.
NO FLOW
NOZZLE IS CLOSED
TROUBLESHOOTING