9.Trouble checklist
Trouble
Causes
Processing method
The pump does
not run
The power switch is not closed.
Close the power switch.
The power supply is not connected.
Connect the power supply.
The input power supply voltage is
abnormal.
Adjust to ±10% of the rated voltage.
The phase voltage is abnormal.
Check the power supply.
The overload protection device is
activated.
Eliminate the action of the overload
Protection device.
The motor connection is incorrect.
Check the wiring, and connect
correctly.
The motor is defective.
Replace the motor.
The safety circuit with
electromagnetic switch is set
incorrectly.
Set the safety circuit correctly.
The oil deteriorates and the viscosity
becomes high.
Change the oil.
The foreign matter enters the pump
and the rotor shaft is bitten.
Inspection (replacement of pump
body, rotor, end cover).
The water, solvent, etc. are sucked
into the pump memory.
Disassemble and repair (washing the
reactants in the pump and de-rusting).
The surface of the rotor is
scratched.
Disassemble and repair(replacement
of damaged parts).
The rotor shaft rotates inflexibly.
Disassemble and repair.
There are attachments on the surface
of the rotor.
Inspection (washing and cleaning the
reactants in the pump).
