17
E.
Check/clean water probe sensors.
The Optima has three water probe sensors (High, Com, Low). Scale build-up on the water probe
sensors can affect sensor accuracy and will prevent the machine from operating abnormally.
What you will need: screw driver (+), 14mm deep socket wrench, breaker bar
(DO NOT USE A POWERED/TORQUED WRENCH!!!), sandpaper, and Teflon tape.
Steps:
1. Unplug the electric cord and let the steam pressure drop to “0.”
2. Cool down and drain the steam vessel by opening the drain valve.
3. Remove the top cover or open the lateral door and disconnect the sensors from wiring.
4. Remove the sensors from the vessel using 14mm deep socket wrench.
5. Using sandpaper, scrub the tip of sensors clean. Replace them if necessary.
6. Wrap the threads of the sensors with Teflon tape at least 6 times and insert the sensors by
using tools.