Diagnosed Problems-Requiring Maintenance; User-Corrected Problem - Hitachi CP100NX Instruction Manual

5-2 Diagnosed Problems-Requiring Maintenance

If any alert message between E11 and E86 appears, this ultracentrifuge requires maintenance by a
service representative. When ordering a repair, inform us of the alert code you have received.
NOTE When the "E13: Unexpected MPG pulse" alert message appears, this alert message is
impossible to clear until the rotor stops.
NOTE Be sure to contact a Hitachi Koki service representative, if the alert message "VACUUM"
persists even after you have done what is specified above. There might be abnormality in the
heater of the oil diffusion pump.
Be sure to contact a Hitachi Koki service representative, if the alert message "E35: DP heater
thermistor abnormality" appears. There might be abnormality in the heater of the oil diffusion
pump.
If the ultracentrifuge does not function even if no problems are reported, do the following:
Symptom
The ultracentrifuge
can not be
energized be by
turning ON
the POWER
switch.
The rotor cannot
cool down or
the rotor temperature
is rising.

5-3 User-Corrected Problem

Cause
The circuit breaker connected
to the ultracentrifuge is
tripped.
Poor vacuum
The room temperature is
higher than 30 °C.
The rotor surface contains
drops of water.
The window part of
temperature sensor contains
drops of water.
5-2 Diagnosed Problems-Requiring Maintenance
5-3 User-Corrected Problem
• Reset the circuit breaker, and turn on the
POWER switch.
•
Check whether the oil of the vacuum pump
needs replacing.
•
Clean or replace the door seal O-ring.
•
f there is an air-conditioner working near
I
the ultracentrifuge, run it at a lower room
temperature setting.
•
If there is no air-conditioner working near
the ultracentrifuge, lower the set speed.
• Wipe water off the rotor with a soft cloth.
• Wipe water off the temperature sensor
the
with a soft cloth being careful not to touch
the sensor with your finger.
5-4
Remedy