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8. TROUBLESHOOTING
Troubleshooting Guide
Symptom
RPM display
remains blank when
the Power key is
pressed.
Evaporation flask
does not rotate when
the Run/Stop key is
ON
Rotation speed is
not stable
Unusual noise
comes from unit
during rotation
Weak or no
decompression
(vacuum)
Jack does not work
properly
Jack does not lock
Vapor Tube cannot
be inserted
Vapor Tube cannot
be pulled out
Motor box angle
cannot be adjusted
Control panel cannot
rotate
Possible causes
● Power supply failure
● AC adapter failure
● Power cable failure
● Controller failure
● External temperature is below
5 °C
● Motor failure
● Bearing failure
● Drive belt failure
● Circuit board failure
● Sample volume is excessive
● Circuit board failure
● Motor failure
● Pulley/belt failure
● Vacuum seal is worn
● Joint nut is loose
● Motor failure
● Bearing failure
● Pulley/belt failure
● Vacuum seal is worn
● Vapor Tube is worn
● Vapor Tube is not set up
properly
● Nozzle gasket is worn
● Vacuum hose is deteriorated
● Jack handle is deteriorated
● Spring is deteriorated
● Bearing is worn
● Components in lock
mechanism are worn or
deteriorated
● Vapor Tube lock mechanism is
worn or deteriorated
● Vapor Tube lock mechanism is
worn or deteriorated
● Rotary part is worn
● Rotary part grease dry-out
● Gasket is worn
Possible measures
Check supply voltage
must be 90-250V AC
● Replace relevant parts
● Replace relevant parts
● Replace relevant parts
● Operating ambient temperature range
is 5 to 35 °C
● Replace relevant parts
● Replace relevant parts
● Replace relevant parts
● Replace relevant parts
● Reduce sample Lower speed setting
● Replace relevant parts
● Replace relevant parts
● Replace relevant parts
● Replace relevant parts
● Re-tighten joint nut
● Replace relevant parts
● Replace relevant parts
● Replace relevant parts
● Replace relevant parts
● Replace relevant parts
● Check that Vapor Tube is installed
properly (P.14)
● Replace relevant parts
● Replace relevant parts
● Replace relevant parts
● Replace relevant parts
● Replace relevant parts
● Replace relevant parts
● Replace relevant parts
● Gentle tap Vapor Tube with plastic head
hammer to remove
● Replace relevant parts
● Replace relevant parts
● Replace relevant parts
● Replace relevant parts
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