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Sterilizer Manufacturer:
Tuttnauer
Model of Sterilizer:
Tuttnauer 1730 E/EK
Problem Title:
Tuttnauer Dry Pump Problem
Problem Description:
The Pump does not turn on
Reasons
1. Air Pump is only coming with EA or EAK machines

Solutions

1. On units with a T96DN1 microprocessor the Dry Pump will come on at the start of any dry cycle but only if the Chamber door is fully closed. The pump will turn off as soon as the door is opened and will not come back on if the door is closed again. To restart the Dry Pump you need to press the Stop Button and abort the present Dry Cycle then select the Dry Only cycle make sure the amount of dry time is correct and make sure the door is closed then press Start.
On units with a T97N6 the Dry Pump will come on at the beginning of any dry cycle regardless of whether the door is open or closed and will stay on even if the door is opened during the dry cycle

Check the Dry Pump Fuse with an ohm meter, if needed replace with a 1.2 amp fuse. The Dry Pump Fuse is located above the two line voltage Fuses or the Circuit Breaker at the back of the autoclave.

Check for a pinched wire or other open in the power leads going from the Dry Fuse to the Dry Pump.

Turn the power off, remove the wires connected to terminals 1 and 2 of the Dry SSR (Solid State Relay). The Dry SSR is located inside the Electronic Box . Terminals 3 and 4 are connected to JP16 on the Ajunc 3 board and JP9 on the Ajunc 2 board. Connect these two wires together and turn the power back on. If the pump runs then the problem is with either the Dry SSR or the control circuit
If the Dry Pump does not run, the problem is with the pump and it should be replaced.

Check if the Dry SSR is being told to turn off. With a DVM read between TP20 and TP1, a 3.5 to 5 volt DC signal tells the Dry SSR to turn off and 0 to 1 volts tells it to turn on. (if the unit has an Ajunc 2 board this check will be made between TP18 and TP1). An incorrect signal would indicate a problem with the control circuit

If the control signal is correct at the test point then check if the signal is at the Dry SSR. A reading across terminals 3 and 4 should show 10 to12 volts DC for the Dry SSR to be turned on and 0 to 1 volt if it should be off

If the control signal is not correct at the Dry SSR then the problem is with the Ajunc board and it should be replaced

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