STIEBEL ELTRON AQ 35 E-2 - Troubles Shooting

7
Troubles shooting
Problem & Condition
Cause
Correction
Power lamp not "ON"
And water not hot
- No power supply to unit
- Low flow
- Power line not tight
- Check breaker
- Check connect points and fix
it.
- Check filter, and flow rate
- Reconnect inlet, outlet
- Check Reed switch set
- Check Thermostat
- Missing water connection
- Reed switch failure
- Triac failure
- Thermal cut-out (TCO)
- Check Triac set
- Heating element broken
- Check heating elements
Power lamp "ON"
But water not hot
Water leak
- Tight connectors
- Connector has loosen
- Wrong installation
- Reinstallation
- Lamp broken
- Lamp cable broken
- Check & change the Lamp
- Check & change Lamp cable
Power lamp not "ON"
But water Hot
Water too hot
- Check Reed switch set
- Reed switch failure
- Triac failure
- Check Triac set
- Heating elements failure
- Check heating elements
- Check Reed switch
- Reed switch failure
Power on maximum but
water not hot enough
- Irregular water flow
- Change pump to smooth
pressure type
Water temperature
not constant
- Overloaded current
on main breaker
- Turn off other appliances
- Change main breaker
Breaker cut-off
- Power line wrong connection
- Reconnect power line L, N, G