11
6.5 Troubleshooting List
Table.4 Troubleshooting List
Problem
Causes
Solutions
Reference
Problems
with starting
and rotation of
pump
(1) Not connected to power supply.
(1) Connect power supply.
(2) Switch is OFF.
(2) Set switch to 0N.
(3) Problem with power supply voltage.
(3) Ensure that voltage variation is /-10%.
(4) Problem with pump wiring.
(4) Rewire the pump. Contact the manufacturer.
3-4.
(5) The breaker has operated.
(5) Investigate the reasons for operation.
(6) The thermal protector has operated.
(6) Switch power OFF, and eliminate the cause of
operation of the thermal protector. Contact the
manufacturer.
4-2.
(7) Low ambient temperature.
(7) Ensure that ambient temperature is 0~40 °C.
4-3.
(8) Low voltage.
(8) Adjust the power supply voltage, and check the
power supply cable.
(9) Fault in power supply.
(9) Replace or repair.
(10) Problem with power supply switch.
(10) Replace or repair.
(11) Broken wire in power cord.
(11) Replace or repair.
(12) Problem with motor.
(12) Replace or repair.
(13) Damaged condenser, or connection
problem.
(13) Replace or repair.
(14) Locked connecting rod.
(14) Disassemble pump head and check interior.
(15) Problem with bearings.
(15) Replace or repair.
6-4.
(16) The air filter is blocked.
(16) Clean and replace.
(17) Miscellaneous damage to pump
components.
(17) Disassemble and repair (replace damaged
components).
6-4.
(1) Pump is too small for capacity of
vacuum vessel.
(1) Select another pump.
(2) Pressure measurement is incorrect.
(2) Measure the pressure correctly.
5-1.
Pressure does
not diminish.
(3) Vacuum gauge is unsuitable.
(3) Measure with a calibrated vacuum gauge suitable for
the pressure range.
5-1.
(4) The inlet piping is too small in diameter,
or too long.
(4) Connect piping of an inside diameter greater than the
inlet diameter, or reduce the distance between the
pump and vacuum vessel.
5-1.
(5) Low voltage
(5) Adjust the voltage, and check the power supply
cable.
(6) Ambient temperature unsuitable.
(6) Ensure that ambient temperature is 0~40 °C.
(7) Leaks in inlet piping.
(7) Clean and replace.
(8) Leaks from piping or connections.
(8) Check for leaks in piping, check diameter and length
of piping, and repair.
(9) Foreign matter inside pump.
(9) Remove foreign matter, disassemble and clean, and
replace components.
(10) Foreign matter inside pump.
(10) Disassemble and repair (replace valves and
diaphragm etc).
6-4.
(11) Damage to motor
(11) Replace or repair.
(12) Damage to valves
(12) Replace.
6-4.
(13) Damage to diaphragm.
(13) Replace.
6-4.
(14) Miscellaneous damage to pump
components.
(14) Disassemble and repair (replace damaged
components).
Pump surfaces
are abnormally
hot (more than
room
tempe
30 °C)
(1) Continuous operation with high
pressure gas.
(1) Do not run the pump continuously at
near-atmospheric pressure.
(2) High temperature gas.
(2) Fit cooling equipment (eg. gas cooler) to the inlet.
(3) Problem with power supply voltage.
(3) Ensure that voltage variation is /-10%.
(4) Motor has seized.
(4) See the section on problems with pump rotation.
