Industrial F.A.Q.’s
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Diaphragm Pump Touble Shooting
Problem
Cause
Solution
Motor does not start
Electrical connections
Blown fuse, main switch, and ground connection
Motor hot
Thermal Protect, Wait until motor cool
Incorrect Voltage
Use correct voltages (+/-10%)
can not prime Restricted inlet
check the strainer, hose, valves
loose drive assembly
tighten the screw
Air in the system
check all fixtures
Incorrect Voltage
Use correct voltages (+_10%)
Pump can not shut off
Restricted inlet
check the strainer, hose, valves
loose drive assembly
tighten the screw
Air in the system
check all fixtures
Incorrect Voltage
Use correct voltages (+_10%)
By-pass set higher than shut-off
Lower it down
Noisy
Restricted inlet
check the strainer, hose, valves
Air in the system
check all fixtures
Crude Mounting surface
install on flat surface
loose drive assembly
tighten the screw ,and the mounting feet
Leaks loose drive assembly
tighten the screw
switch or pump assembly rupture
check the switch and pump head assembly, and replace the kits
Low pressure/flow
Air in the system
check all fixtures
leak
check all fixtures
Incorrect Voltage
Use correct voltages (+_10%)