Troubleshooting for diaphragm pump

1. PUMP WILL NOT START:

√ Fuse or breaker

√ For correct voltage(±10%)  and electrical connections

√ Pressure switch operation and correct voltage at switch or motor wires(as equipped).

√ Rectifier or motor for open or grounded circuit

√ For locked drive assembly 

2.WILL NOT PRIME:(no discharge/motor runs)

√ Out of product

√ Strainer for debris

√ Inlet tubing/plumbing; severe vacuum leak

√ Inlet/ Outlet tube severely restricted (kinked)

√ Debris in pump inlet/outlet valves

√ Proper voltage with the pump operating(±10%)

√ Pump housing for cracks 

3. LEAKS FROM PUMP HEAD OR SWITCH:

√ For loose screws at switch or pump head.

√ Switch diaphragm ruptured or pinched

√ For punctured diaphragm if fluid is present at bottom drain holes. 

4. PUMP WILL NOT SHUT-OFF

(Pressure switch equip.)

√ Output line closed and no leaks

√ For air trapped in oulet line or pump head

√ For correct voltage to pump (±10%)

√ Inlet/Outlet valves for debris or swelling 

√ For loose drive assembly or pump head screws 

√ Pressure switch operation/adjustment incorrect refer to specifications for differential and pressure adjustment procedure. 

5. NOISY/ ROUGH OPERATION: 

√  Mounting feet that are compressed to tight

√  For loose pump head or drive screws

√  Does the mounting surface multiply noise (flexible)

√  Is the pump plumbed with rigid pipe causing noise to transmit.

If the diaphragm pump with problem, please check the 5 steps firstly. 

Or send picture to video to us, we will give you suggestion to us. 

Contact us freely : sales@sailingflo.com