STIEBEL ELTRON AQ 35 E-2 - Root Cause Analysis; Heating Elements Checking

8
Root Cause Analysis
1. Heating Elements Checking
Definition: Heating Element is a metal coil that heats up to high temperatures, when
electricity is applied. To check the Heating Element, follow the steps below:
- Disconnect cables from the Elements.
- Set Multi )))) "and check as show in the pictures.
Check
Meter Result
Cause
Action
Pole  Pole
"Beep" signal or (~ 0 )
Element Pass
No action
No signal "OL" or ( 
Element Broken
Change New Heater
Pole  GRD
"Beep" signal or (~ 0 )
Element short to tank
Change New Heater
No signal "OL" or ( 
Element Pass
No action
Remark: "OL" = Over Load for Digital Multimeter, " Multimeter
Pole - Pole  (P1 - P2)
P1
P2
Pole - GRD  (P1 - GRD) or (P2 - GRD)
Or
GRD
P1
P2
GRD