LF 001C Tankless Water Heater Intelligent Home Instant Water Heater Under Sink Remote Control Panel Control for Kitchen Bathroom 110V 4000W Item Type: Instant Water Heater Material: ABS, Copper, Aluminum, Tempered Glass Gross Weight: 1913g / 67.5oz Heating Body: Aluminum Die Casting Voltage: 110V Power: 4000W Frequency: 50-60HZ Electric Wire: 4㎡ Waterproof Grade: IPX4 Product Size: Approx.21 x 15 x 5.5cm / 8.3 x 5.9 x 2.2in Remote Power Supply: two AAA batteries (not included) Temperature Range: 30-55°C Common faults and handling methods: 1. Check whether the power supply is normally energized. The display will light up to show the temperature. 2. Under normal power condition, water flow is turned on, press the middle switch, the machine will start heating, and the water heater will display: Set temperature, water flow, outlet temperature. 3. If the temperature does not rise, there are two possibilities: one is that the temperature control switch (overheat protection switch) inside the water heater jumps, which can be recovered by pressing the temperature control switch; the other is that the heating tube is faulty, which can be replaced by the heat pipe 4. If you have showed no heating, temperature display shows, did not show water flow and the set temperature, water without water heater, or water pressure is too low, or install the wrong direction, pay attention to water and water to be installed correctly, but if the water pressure, water will also not heating, then check the water heater inlet turbine, it is possible that there is dirt stuck turbine, the water heater will not start. 5. It is recommended that the length of water outlet pipe of water heater should not exceed 3 meters. If the length of water outlet pipe exceeds 3 meters, there may be water pressure difference due to the length of water pipe, and the water pressure is not enough to start the water heater(If the water tower is used in rural areas, the height of the water tower is required to be higher than 10 meters, so that the water pressure reaches the starting value)