Tuttnauer 2540 EHS, Technician Manual

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9.9 Replacing the Door Switch
The door switch is designed to ensure that the door is properly closed
before and during a cycle.
Caution!
Before starting, disconnect the instrument from the power source
and ensure that there is no pressure in the autoclave’s chamber.
1. Take off the autoclave cover (see para. 9.2
“
Removing the
Autoclave’s Outer Covers
” ).
2. Disconnect the wires from the door microswitch.
3. Remove the microswitch and replace it with a new one.
4. Reconnect the black ground wire (2) to the microswitch.
5. Test the connection with an ohmmeter. Connect the ohmmeter to
the common terminal of the microswitch (1) and chassis ground. In
the “door open” position the ohmmeter should show no continuity
and in “door close” position the ohmmeter should show a complete
circuit.
5.1 If it fails the test then check that the ground wire is connected
to the correct terminal. If it is then replace the microswitch.
5.2 If it passes the test then connect the green wire from the
electronic box to the common terminal (1) of the switch
6. Reassemble the autoclave cover.
3
2
1
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