Troubles Shooting - STIEBEL ELTRON AQ 35 E-2 Service Manual

Problem & Condition
Power lamp not "ON"
And water not hot
Power lamp "ON"
But water not hot
Power lamp not "ON"
But water Hot
Breaker cut-off
Power on maximum but
water not hot enough
Water temperature
not constant
Water too hot
Water leak

Troubles shooting

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