Ulvac DIS-90, Instruction Manual

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6. Problems and remedies
If something goes wrong, refer to the following chart and remedy problems.
If you cannot solve your problems, please contact either our sales branches who sold
it to you or local sales.
Problems Causes Remedies
Motor does not rotate.
Protective device (or breaker)
activates.
※
Inspect and repair.
Electric source cable is loose
or cut. Check connection.
Repair or replace.
Voltage drops. Check size and length of cable.
Motor malfunctions.
※ Inspect and repair.
Pump malfunctions.
Foreign matter enters.
※
Inspect and repair.
Motor protection gear
activates. Air outlet is clogged.
Reset thermal protector.
※
Inspect and repair.
Motor stops soon.
Protective device (or breaker)
activates.
※
Inspect and repair.
Voltage drops. Check size and length of cable.
Motor malfunctions.
※
Inspect and repair.
Pump malfunctions.
Foreign matter enters.
※ Inspect and repair.
Improper exhaust piping. Check exhaust piping diameter and
length.
Air outlet is clogged.
Remove blank flange from exhaust
outlet.
Motor protection gear
activates. Air outlet is clogged.
Reset thermal protector.
※
Inspect and repair.
Ultimate pressure is
insufficient.
Air leaks from piping.
O-ring is damaged. Check tightness of piping.
Replace.
Moisture and solvent are
drawn. Open inlet to atmosphere and operate
for a few minutes and then close inlet
and operate for about 24 hours.
Do air-flush opened operation.
Install trap and filter.
Number of motor revolutions
drops.
Check wiring and voltage.
※ Inspect and repair.
Pump malfunctions. ※
Inspect and repair.
Abnormal sound,
abnormal vibration
Connection becomes loose. Tighten connection.
※
Inspect and repair.
The installation is not level. Correct vacuum pump inclination within
5°.
※
Inspect and repair.
Foreign matter enters pump.
※
Inspect and repair.
Motor malfunctions.
※ Inspect and repair.
Pump malfunctions.
※ Inspect and repair.
※
Contact our distributor who sold it to you.
7. Disposal
When a vacuum pump is disposed, please comply with local law and/or regulations
such as the Waste Disposal Law.