Sterilizer.com Sterilizer Parts Technical Home FAQ Search Submit a Question Your Local Service Login
Enter question keywords
to search

Sterilizer Manufacturer:
Tuttnauer
Model of Sterilizer:
Problem Title:
Tuttnauer E/EA/EK/EAK Add Water Indicator Problem
Problem Description:
Indicator is always off
Reasons
1. No control signal found from the water float switch sensor

Solutions

1. Check that the Float Switch is free to move up and down

Check the connector at JP2 on the Ajunc board for loose connection or a broken wire.

Check the wires going to the Float Switch for any shorts to the chassis

Check between TP8 and TP1 for a DC voltage of 0 to 1 volt if the water level in the reservoir is acceptable and 3.5 to 5 volts if the level is too low.

If the readings are correct but the indicator light remains off all the time then the problem is with the Digital Predg board or the Flat Cable between the Predg and Ajunc boards.

Inspect the Flat Cable for loose connectors and bent or broken pins. Insure a good connection when reconnecting the Flat Cable

If the problem is still not corrected then replace the Digital Predg board.

If the readings are not correct then check continuity across the Float Switch. Cut the wires going to the Float Switch if necessary, connect an ohm meter and move the Float Switch up and down.
When in the up position the meter should show continuity.
When in the down position the meter should show an open circuit.

If the continuity check fails then replace the Float Switch

If the Float Switch checks out okay then there is a Control Problem

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