43
2017/08 Rev. 2.0
EN
OptiBean NG /OptiBean XL NG
Reset
Dry boil protection
This double pole dry boil protection [1.4] protects
the heating element [1.3] against dry boiling. When
the switch detects a temperature above 135°C both
contacts switch off and disconnect both heating
connection from the electric mains. Reset is only
possible after de boiler has cooled down and both
contacts are manually reset by hand.
WARNING
•
Always disconnect the machine from the mains, the
reset buttons are life!
If the dry boiler protection [1.4] is activated a Error 21
shall appear on the display after 6 minutes.
The reason from activating the protection can be
caused by air in the waters main which is transported to
the boiler, or an other malfunction of the heating system
Temperature regulation
The heating element [1.3] is turned on when the water
temperature falls below the temperature setting. The
temperature in the water reservoir is measured using an
NTC precision sensor [1.1] mounted trough the wall of
the boiler.
The heating element always switches off when the
maximum boiler temperature of 105˚C is reached, a E6
error will appear on the display.
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