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This ultracentrifuge incorporates a "self-diagnosis feature" that diagnoses the cause of any problem
which may occur when you start the centrifuge or while in operation.
If any trouble occurs, this machine gives a buzzer sound and displays an alert message in the
FUNCTION area of the Run screen to warn of the trouble.
If an alert message appears, remove the cause of the trouble as described below and press the
[CE] button. You will then be able to resume your centrifugation.
WARNING: Unspecified repairs, remodeling or disassembly of the centrifuge that is not listed in
Table 5-1 is strictly prohibited by any person other than a Hitachi Koki authorized
sales/service representative.
If the alert message persists even after you have done what is specified below, contact service
representative to order a repair.
Alert
POWER FAILURE
INVALID SPEED
IMBALANCE
5-1 Alert Indicators
Fig.5-1 Displaying an alert message
Cause
1. A power failure occurred while the
rotor was rotating.
Refer also to section 3-5 "Happenings when power failure occurs".
1. Rotor speed is set higher than the
maximum allowable speed.
1. Rotor is not properly balanced, and
abnormal vibration has occurred in
the rotor.
2. Rotor cover or cap is not properly
tightened.
3. The ACCEL/DECEL code numbers
that you chose are not applicable.
(Applicable
ACCEL/DECEL
numbers are limited depending on
the rotors.)
Table 5-1 Alert List
• Unless the set run time has elapsed,
restart the run.
• If the instrument was automatically
restored and the rotor is rotating at
set speed, then let the run continue.
• Set the speed within their permitted
limits.
• Check if the sample tubes exceed
allowable imbalance level.
• Check if any one of the tubes is
deformed, and if there is any sign of
sample leakage.
• Tighten rotor cover or cap securely.
• Check whether ACCEL/DECEL code
number setting is applicable to this
code
rotor (see the rotor instruction manual).
5-2
5-1 Alert Indicators
Alert message
Action
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