Royalstar water heater fault code:
1 and E 1 indicate that the heating pipe is faulty and needs to be replaced or cleaned.
2.E2 indicates that the sensor is faulty and needs to be replaced.
3.E3 indicates that the water level sensor is faulty and needs to be replaced.
4.E4 indicates that the waterway is blocked and needs to be cleaned.
5.E5 indicates that the vacuum tube is faulty and needs to be replaced.
Fault code of upgraded Rongshida water heater:
1 and F 1 indicate that the motherboard is faulty and needs to be replaced.
2.F2 indicates exhaust failure, so it is necessary to check whether the exhaust pipe and steam valve are normal.
3.F3 indicates that the pressure sensor is faulty and should be replaced.
4.F4 indicates that the water pump is out of order and needs to be replaced.
5.F5 indicates that the controller is faulty and needs to be replaced.
Fault code of high-end Royalstar water heater:
1 and H 1 indicate that the refrigerator is out of order and needs to be replaced.
2.H2 indicates that the heat pump is out of order and needs to be replaced.
3.H3 indicates that the radiator is faulty and needs to be replaced.
4.H4 indicates that the high efficiency filter is out of order and needs to be replaced.
5.H5 indicates that the compressor is faulty and needs to be replaced.
The above is the common fault code of Rongshida water heater. If you encounter the above faults, you can handle them according to the corresponding methods. If it can't be solved, you can contact professional and technical personnel for maintenance.