5402 error 2
In a 5402 Eppendorf Centrifuge, Error 1 states primarily for an EEPROM error. EEPROM is a tiny memory chip that stores individual details of the centrifuge, mainly the microprocessor time base (for correct time set operations), the mains voltage (115 or 230 V, to inform and set the motor current levels), and the imbalance level adjustment for the imbalance sensor. When the centrifuge powers up, these data are readen, and if all OK, the centrifuge is ready to go. If one of them corrupts, especially the 115 or 230 Volt information, we get error 1 and no start allowed.
To check and reprogram this EEPROM we have to acess the service routine. This is done by by jumping together pins 1 and 5 of X8 conector, on the base of the electronic board, located behind the power cable panel in the back of the centrifuge. There are about 20 setting or check parameters, but usually 1 or 2 of the described above need to be reprogrammed. Please e-mail me for details: firstname.lastname@example.org.
Error 2 is Motor Tach (Speed sensor) error, caused usually if the cable pops off the electronic board. But the tach sensor itself, who stays in the bottom of the motor drive, could be broken or defective.
Paulo H. F. Pimenta
Dec 13, 2013 |
Eppendorf 5402 Refrigerated Centrifuge