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

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 meter to Ohm range "Ω" or "
GRD
Check
"Beep" signal or (~ 0 Ω)
Pole – Pole
No signal "OL" or ( Ω)
"Beep" signal or (~ 0 Ω)
Pole – GRD
No signal "OL" or ( Ω)
Remark: "OL" = Over Load for Digital Multimeter, " Ω" = Over Load for Analog Multimeter

Root Cause Analysis

1. Heating Elements Checking

) "and check as show in the pictures.
)
)
)
Pole - Pole 
P1 P2

Pole - GRD 
(P1 - GRD
P1
Or
Meter Result
Element short to tank
8

(P1 - P2
)
P2 - GRD
) or ( )
GRD
Cause
Element Pass
Element Broken
Element Pass
P2
Action
No action
Change New Heater
Change New Heater
No action