6
Troubleshooting
When to contact a Service Technician
Thermo Scientific
Multifuge 4KR
6-5
When to contact a Service Technician
If you need to contact a service technician, please provide the order no. and the serial no. of your
centrifuge. You will find these information at the top right.
To identify the software version, proceed as follows:
1. Turn on the power switch on the right side of the device.
The centrifuge performs a self-check of its software. Subsequently, the following readings will be
displayed. The order is:
E-12
The run does not start or the centrifuge runs
down without being braked.
Temperature measurement error
Restart the centrifuge.
If the message appears again, inform a service technician.
E-14
Centrifuge does not start or decelerates to
standstill.
No rotor present or rotor identification impossible.
a.
Check whether a certified rotor is inserted.
b.
Following a brief power failure, the rotor could not be
identified.
Restart the centrifuge.
If the message appears again, inform a service technician.
E-15
The run does not start or the centrifuge runs
down without being braked.
The check sum in the NV-RAM is incorrect.
E-17
Door does not open.
Door is blocked or jammed.
Press the door down once at the front in the center and then
actuate the
key again.
Otherwise see
“Mechanical Emergency Door Release”
on
page 6-2
.
E-19
The centrifuge cannot be operated.
Incorrect NV-RAM or key panel
E-22
The centrifuge cannot be operated.
NV-RAM parameter does not fit the processor
E-24
The centrifuge cannot be operated.
NV-RAM 2 missing
E-25
The run does not start or the centrifuge runs
down without being braked.
Start without rotor.
Open the centrifuge by pressing the
key.
Check whether the rotor is installed and loaded properly.
Check whether a broken tube or damaged rotor released the
imbalance switch.
Restart the centrifuge.
If the message appears again, inform a service technician.
Failure Message
Problem with Centrifuge
Possible Causes and Cures
Software version key panel
Software version
NV-RAM-Version 1
NV-RAM-Version 2
Cycle counter
