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Sterilizer Manufacturer:
Tuttnauer
Model of Sterilizer:
Problem Title:
Tuttnauer E/EA/EK/EAK Fan Problem
Problem Description:
Tuttnauer fan is not running - units manufactured before 2/2000
Reasons
1. If no cycle is running, the FAN will turn off after 2 hours

Solutions

1. The Fan will come on when the autoclave is turned on. If no cycle is run the Fan will turn off after two hours. Pressing any key on the Keypad should start the Fan again. If not then cycle the unit off then on and that will reset the Fan

Unplug the Fan, JP5 on the Ajunc 2 or JP15 on the Ajunc 3 and make sure the Fan Blade is free to turn. Remove any dirt from the blade and free the blade from any obstructions

Check between TP13 and TP1 for a 0 to 1 volt DC signal this is instructing the Fan to turn on, a 10 to 12 volt DC signal tells the Fan to turn off.

If the correct signal is present then check that the JP5 connector on the Ajunc 2 Board or the JP15 on the Ajunc 3 Board is plugged in correctly. Unplug and then replug in the connector making sure a good connection is made. Repair the connection if needed.

Remove the JP5 connector on the Ajunc 2 board or the JP15 connector on the Ajunc 3 board and check across the JP5 or JP15 terminals on the for +12 volts DC.

If the correct voltage is not present then check across TP15 and TP1 for the +12 volts. If the voltage is not present across TP15 and TP1 then check the Power Supply

If the voltage across TP15 and TP1 is correct then replace the Ajunc 2 or Ajunc 3 board.

If the correct voltage is present across either JP5 or JP15 and the connection is good, then replace the Fan.

The technical information is just to help sterilizer users as reference to do their trouble shooting.
no guarranty implied. For each specific technical help to do with sterilizers
or autoclaves, go to www.sterilizers.com ... or call 1-800-801-9934 Contact Us