The unit must be installed vertically to prevent heating element malfunction and ensure longevity.

| Symptom | Possible Cause | Solution | | :--- | :--- | :--- | | | Power supply issue or Tripped breaker. | Check the breaker box and ensure the plug is secure. | | Water not hot enough | Flow rate too high or Power setting too low. | Reduce water flow at the tap or increase the temperature/power setting on the unit. | | Display shows "E1" or similar | Water pressure too low or sensor failure. | Check that water is flowing freely. Clean the inlet filter to remove debris. | | Leaking | Loose fittings or internal seal failure. | Tighten fittings. If internal, disconnect power and contact support. |

The XYFB series is known for its energy efficiency and robust build quality. However, these are complex appliances. Unlike a simple kettle, a modern XYFB unit (which may be a tankless, gas, or electric storage model depending on the sub-series) features sensitive thermostats, flow sensors, and safety valves.