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Sterilizer Manufacturer:
Tuttnauer
Model of Sterilizer:
Problem Title:
Tuttnauer E/EA/EK/EAK Water Fill Problem
Problem Description:
Autoclave does not fill automatically
Reasons
1. Water filling system failure

Solutions

1. Is the Reservoir filled with Distilled Water to just below the Pressure Relief Valve?

Is there anything blocking the pickup tube at the bottom of the Reservoir?

Is the Water Sensor, in the Chamber, clean?

Is there anything touching or shorting out the Water Sensor?

Check how much water the machine is filling itself with.

Leaving the door open, select a sterilization cycle, press and hold the Door Switch Button, and press the Start Button

Do you hear the Fill Solenoid click when the Start Button is pressed?

If a click is heard then is water flowing into the Chamber?

For units with Microprocessors dated T97DN7WP or later in addition to hearing the click of the solenoid do you hear the Water Pump?

If no water is flowing then the problem could be:

A clogged Filter Screen, on machines manufactured before 9/96 at the back of the machine, remove the three screws on the round brass plate, remove the plate, take out and clean the screen.

Machines manufactured between 9/96 and 2/2000 will have a screen located inside the Chamber in the fill hole at the back, clean or replace this screen.

Units manufactured or repaired at Tuttnauer after 2/2000 will have a Chamber Strainer located at the left rear corner of the autoclave, either inside or outside the unit. Units with an external strainer will have a chrome cap on the back of the autoclave. Caution this cap can be hot. Remove the cap to clean the strainer. Units with internal strainers will need to have the Outer Cabinet removed to access the strainer. Once the Outer Cabinet is removed then open and clean the strainer.

A clogged Pump Strainer on units with Microprocessors dated T97DN7WP or later. Disassemble the Pump Strainer and clean the two wire mess screens and one fiber screen.

Malfunctioning Water Pump on units with Microprocessors dated T97DN7WP or later. Check the functioning of the Water Pump

A clogged Water Filter, in the bottom of the reservoir on some models there is a bronze filter. Clean or replace this filter if present.

A clog at the Water Fill Valve, remove the cover of the autoclave and open the valve and clean out the brass base assembly.

A deformed seat on the Water Fill Valve Plunger, remove the cover of the autoclave, open the valve, and replace the plunger.

A clog in the Water Fill Line, remove the cover of the autoclave, open the waterline, and clear the clog or replace that length of tubing.

If no click is heard then, release the Door Switch Button and press the button located on the keypad that is marked with the two arrows, this is the Manual Water Fill Button:

Do you hear the solenoid click when the button is pressed?

If a click is heard when pressing the Manual Water Fill Button, but not heard when the Start Button was pressed this would indicate a control problem

If no click is heard when pressing the Manual Water Fill Button then:
Check TP10 to TP1 on the Ajunc board for a 0 to 1 volt DC signal when the button is pushed and a 10 to12 volt DC signal when the button is released.

If the correct voltages are not seen this would indicate a control problem. If the correct voltages are observed on the test points then check at the solenoid itself for the proper voltages.

If the solenoid is not receiving the correct voltages then check the wiring between the connection box and the back of the Ajunc board for a bad connection. Repair the connection.

If the previous connection is good then replace the Ajunc board.

If the correct voltages are observed then either the Solenoid is defective or the Plunger is stuck

Remove the Solenoid Coil and check it

Remove the Plunger assembly and check for debris that may be stopping the Plunger from moving.

If a click is heard when pressing the Manual Water Fill Button, then water should be flowing on units manufactured up to 2/2000.

If the unit has a Microprocessor dated T97DN7WP or later then a Water Pump is installed and must also be running in order for water to flow.

If the pump is not running, check the pump

If the solenoid is activating and the pump is running and water is still not flowing then see the beginning of this section “If no water is flowing then the problem could be “

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