Instruction manual

Troubleshooting
Diagnosed problems - requiring maintenance
Thermo Scientific WX Ultra Series 4-3
Diagnosed problems - requiring maintenance
When a problem except those listed in Section 4-1 is reported on the message display at the bottom of
the screen, call your authorized Thermo representative and communicate the displayed problem
message.
Non-diagnosed problems
If the ultracentrifuge does not function even if no problems are reported, do the following:
ROTOR 1. The rotor is not seated on spindle. • Install rotor.
IMBALANCE 1. Rotor is not properly balanced, and
abnormal vibration has occurred in the
rotor.
2. Rotor cover or cap is not properly
tightened.
• 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.
SPEED 1. Rotor speed is set higher than the
maximum allowable speed.
• Set the speed within the permitted limits.
POWER 1. A power outage occurred while the
rotor was rotating.
• Unless the set run time has elapsed, restart the run.
• If the power was automatically restored and the rotor
is rotating at set speed, then let the run continue.
Refer also to Section When power failure occurs.
Note When the “No. 13 Unexpected MPG pulse” alarm occurs, the related problem code is
impossible to clear until the rotor stops.
Symptom Cause Remedy
The ultracentrifuge cannot be
energized by turning ON the
POWER switch.
The circuit breaker connected to the
ultracentrifuge is tripped.
• Reset the circuit breaker, and turn on
the POWER switch.
The rotor cannot be held at the
correct temperature.
Poor vacuum • Check whether the oil of the vacuum
pump needs replacing.
• Clean or replace the door seal o-ring.
The room temperature is higher than
35 C.
• If there is an air-conditioner working
near the ultracentrifuge, run it at a
lower room temperature setting.
• If there is no air-conditioner working
near the ultracentrifuge, lower the set
speed.
The rotor surface contains drops of
water.
• Wipe water off the rotor with a soft
cloth.
The window part of the temperature
sensor contains drops of water.
• Wipe water off the temperature sensor
with a soft cloth being careful not to
touch the sensor with your finger.