STIEBEL ELTRON AQ 35 E-2 - The Other Way to Activate Flow Switch

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3.3) The other way to activate Flow Switch.
Check
Result
Cause
Action
Pole - Pole
"Beep" signal " )))) "
Pass
No action
No signal "OL" or ( 
Reed SW not activate
Check Magnet
Remark: "OL" = Over Load for Digital Multimeter, " Multimeter
Pole - Pole
Used Magnet to activate
unit