Tuttnauer 1730EK, Technical Manual

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9.16 Replacing the Door Switch
Caution!
Before starting, disconnect the instrument from the power source and
ensure that there is no pressure in the autoclave.
Allow the autoclave to cool before removing outer covers.
1. Take off the autoclave cover (see para. 9.2
“ Dismantling the Outer
Covers of the Autoclave "
).
2. Disconnect the wires (1), (3) from the door microswitch (2).
3. Remove the microswitch and replace it with a new one.
4. Reconnect the black ground wire (3) to the microswitch.
5. Test the connection with an ohmmeter. Connect the ohmmeter to the
common terminal of the microswitch 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.
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