20
D.
How to check and clean water probe sensors
Three water probe sensors (high/common/low) detect the water level in the steam vessel
and trigger the running and stopping of the water pump.
Minerals or various foreign substances in the water become hardened and are highly likely
to cause water level detection failure.
Requirements: Screw ), 14mm long box wrench or Spanner, Sand paper, Teflon tape.
Steps:
1.
Unplug the power plug and then remove pressure completely by opening steam outlet
valves.
2.
Open the drain valve and drain out all water from steam vessel.
3.
Detach top cover and front cover. Then detach all electric wires from water probe
sensors.
4.
Remove water probe sensors from steam vessel using 14mm T-Box Wrench.
5.
Clean scale build-up from the tip of the water probe sensors with sand paper. Replace
them if necessary.
6.
Wrap the sensor thread at least 6 times with Teflon tape.
7.
Hand-turn the sensors in for the first 2-3 turns, then use a 14mm T-Box Wrench to
hand-tighten.
The sensors are not meant to be tightened like fastener bolts. Tightening with power tools is
NOT recommended. Over-tightening may strip the thread and result in permanent damage
to the steam vessel.
OPTIMA DM(DMF)
OPTIMA EST
