Instructions / Assembly

Troubleshooting (cont’d)
Symptom Cause Cure
Pump will not prime.
1. Suction line problem
2. Closed loop coupler not properly
engaged
3. Bypass valve open / sticking
4. Outlet blocked
Check suction line for leaks or restrictions / kinks; too
small, too long, or not airtight. RPV not locked.
RPV or similar coupler not properly engaged. Refer to
coupler manufacturers instructions.
Remove and inspect valve (page 11, item 24); valve
must move freely & be free of debris.
Check pump outlet, hose, nozzle & lter for blockage.
Pump runs slowly.
1. Incorrect voltage
2. Motor problem
Check incoming line voltage while pump is running.
Return to place of purchase.
Motor stalls.
1. Bypass valve sticking
2. Low voltage
3. Restricted suction
4. Debris in pump cavity
5. Motor failure
Remove and inspect valve (page 11, item 24); valve
must move freely & be free of debris.
Check incoming line voltage while pump is running.
Remove and clean suction line.
Clean debris from pump cavity.
Return to place of purchase.
Motor inoperative.
1. No power
2. Switch failure
3. Motor failure
4. Incorrect / loose wiring
Check incoming power / Fuse (DC) / Breaker (AC).
Return to place of purchase.
Return to place of purchase.
Check wiring and connections.
Fluid leakage.
1. Bad o-ring seal
2. Incompatible uid
3. Loose fasteners
Check all o-ring gaskets.
USE ONLY with DEF or water.
Tighten fasteners.
Low or no ow rate.
1. Low level in tank
2. Excessive suction requirements
3. Pump running in bypass
4. Bypass valve open
5. Air entering suction side
6. Suction line restriction
7. Low rotation speed
8. Suction tube is resting on the
bottom of the tank
9. Pump or motor frozen
Rell tank.
Minimum 3/4” diameter suction line not to exceed rated
lift. Suction line to be 2” off bottom of tank.
Use shorter discharge hose, or greater diameter.
Remove and inspect valve (page 11, item 24); valve
must move freely & be free of debris.
Check suction side seals and connections.
Use tubing suitable with for working with suction
pressure.
Check voltage at the pump. Adjust voltage and / or use
cables with larger guage wire.
Modify suction tube to correct length.
Thaw pump and check for damage. Starting a frozen
pump can damage the motor and / or pump.
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