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Symptom
Causes
Countermeasures
The display will not come on even if the
POWER key is pressed.
The power plug is off the outlet or is not inserted
completely.
Insert the power plug into the outlet securely.
The connector of the power cord is not inserted into
the AC adaptor socket completely or is come off.
Insert the power cord connector in the AC adaptor
socket securely.
The plug of the AC adaptor is not inserted into the
power jack at the back of the control case securely or
is come off.
Insert the plug of the AC adaptor is not inserted
into the power jack at the back of the control
case securely.
AC adapter, power cord or DC plug code is
disconnected or malfunctioning.
Replace any defective part.
Power is not supplied.
Turn the ELB on the distribution board ON.
The display board or the control board is
malfunctioning.
Immediately stop operation and contact your dealer
or the nearest service center.
The display comes on but does not rotate.
(The motor is not rotating.)
The control board is malfunctioning.
Immediately stop operation and contact your dealer
or the nearest service center.
The motor is malfunctioning.
The bearings have become rusty.
The display comes on but does not rotate.
(The motor is rotating.)
The timing belt is defective.
Rotation makes hunting.
The lock sleeve (light blue) that tightens and fixes the
rotary joint has loosened.
Turn the lock sleeve (light blue) clockwise while
holding the lock housing (black) to tighten securely.
The amount of specimen is too large (Standard RJ
including the specimen flask:
Approx. 1.5kg, thickness RJ: approx. 2kg
）
Or items
or powder specimens are distributed unevenly causing
the load fluctuation of the specimen too large.
Reduce the specimen or change the number of
rotations to avoid uneven distribution of specimen
during rotation.
The control board is malfunctioning.
Immediately stop operation and contact your dealer
or the nearest service center.
The motor is malfunctioning.
The pulley and the belt are worn.
Strange noise is heard during rotation.
The vacuum seal is worn.
Replace the vacuum seal.
The lock sleeve (light blue) that tightens and fixes the
rotary joint has loosened.
Turn the lock sleeve (light blue) clockwise while
holding the lock housing (black) to tighten securely.
The motor is malfunctioning.
Immediately stop operation and contact your dealer
or the nearest service center.
The bearing of the driving assembly is rusty.
The pulley and the belt are worn.
The vacuum level is low.
Decompression leakage is occurring.
The decompressing unit performance has been
compromised.
By kinking the vacuum hose between the
decompressing unit and this unit to cut off the
vacuum line to check for leakage on this unit.
The tapered sliding part on the specimen flask is not
closely contacted to the sliding part of the rotary joint.
The Eyela clip has come into contact with the rotary
joint.
Some older type rotary joints have a shorter
inserting part for Eyela clip and clipping may be
imperfect.
In that case, lightly press it during decompression.
The lock sleeve (light blue) that tightens and fixes the
rotary joint has loosened.
Turn the lock sleeve (light blue) clockwise while
holding the lock housing (black) to tighten securely.
The vacuum seal is worn.
Replace the vacuum seal.
The rotary joint is worn.
Replace the rotary joint.
The nozzle packing of the vacuum nozzle set is
deteriorated.
Replace the nozzle packing of the nozzle set.
The vacuum hose is deteriorated.
Replace the vacuum hose.
The jack cannot be raised or lowered.
The jack cannot be locked.
The jack operation is sluggish or produces
a strange noise.
The jack lock mechanism is broken.
Immediately stop operation and contact your dealer
or the nearest service center.
The coil spring is deteriorated.
The jack slide bearing is worn or rusty.
Contact your dealer or the nearest service
center for troubles not listed here.
Causes of troubles and solutions
6
