Haier DSF80B User Manual - Page 11

7 Q/A Phenomenon Water too hot Water temperature fluctuation Water too cold Without electricity When used, the power supply air switch tripping takes place It doesn't work in case of water supply Displays E3 Things to be confirmed 1. Water flow too low to water heater or external tap water temperature rising 2. Power too high Outlet water temperature higher than 58℃; the water heater is in the fixed temperature control working state 1. Water flow too high or power too low 2. Water pressure too low so that the water heater doesn't start up 3. Voltage fluctuation 4. Lower than the requirements of the product 1. Water pressure too low so that the water heater doesn't start up 2. Power off 3. Parts and components don't work or are damaged 1. Insufficient air switch capacity 2. Circuit fault of the water heater 1. Air switch tripping 2. The circuit is not connected 3. Over-temperature protection Sensor fault Solutions 1. Turn up the inlet water 2. Turn down the power As above 1. Reduce the inlet water or increase the power 2. Check whether the water source is sufficient; if water pressure needs to be increased, temporarily close other water valves in the house or install an additional pressure pump to increase water pressure 3. Return to normal voltage 4. Contact the repair & maintenance department 1. If the water pressure needs to be increased, temporarily close other water valves in the house or install an additional pressure pump to increase water pressure 2. Have the circuit checked by professional personnel 3. Contact with the repair & maintenance department 1. Replace air switch 2. Have it checked by qualified professional personnel Have the circuit checked and repaired by professional personnel Have the circuit checked and repaired by professional personnel