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GAS TANGKLESS WATER HEATER ERROR CODE
Error code guide When an error code is displayed:
1. Close the hot water faucet, turn off the switch on the remote control.
2. Wait for about 5 minutes before turning the switch on again.
3. Open the hot water faucet.
If error code remains down:
1. Close the hot water faucet and turn off the switch on the remote control.
2. Take the proper action shown below and attempt operation of the appliance again.
| Error Code | Fault Names | Possible Causes of Malfunctions | Troubleshooting Steps |
| E0 | Water Temperature Sensor Malfunction | Poor contact between the terminal connectors of the temperature sensor and flow sensor and the controller | Connect the terminal connectors to the controller properly. |
| Malfunctioning temperature sensor or flow sensor. | Replace the temperature sensor or flow sensor. | ||
| E1 | Ignition Failure | Gas valve not opened. | Open the gas valve. |
| Low gas pressure. | Adjust the gas pressure to the appropriate range. | ||
| Gas type used is not compatible with the water heater. | water heater. Use gas compatible with the water heater. | ||
| Ground wire on the controller not properly connected. | connected. Properly connect the ground wire to the water heater casing. | ||
| Positive and negative terminals of the controller and proportional valve connectors reversed. | Connect the red wire to the "+" and the black wire to the "-" as instructed. | ||
| E2 | Accidental Flame out | Poor or faulty connection between the flame feedback wire on the controller and the flame feedback pin | Ensure tight contact between the flame feedback wire on the controller and the flame feedback pin. |
| E3 | Over temperature Fault | Water temperature detected by the temperature sensor is ≥167°F. | Restart the water heater. |
| Malfunctioning temperature sensor. | Replace the temperature sensor | ||
| E5 | Air Blockage / Air Pressure Switch Malfunctio | Air duct is blocked. | Eliminate any blockages in the air duct. |
| Incorrect or poor connection between the air pressure switch wire and the air pressure switch. | Properly connect the air pressure switch wire to the air pressure switch. | ||
| Malfunctioning air pressure switch. | Replace the air pressure switch. | ||
| E7 | Solenoid Valve Malfunction | Poor contact between the controller and the solenoid valve. | Properly connect the controller and the solenoid valve. |
| Malfunctioning solenoid valve. | Replace the valve body assembly. | ||
| Eb | Residual Flame Fault | Flame still present after water or power is turned off, and the solenoid valve does not release after closing. | Replace the valve body assembly. |
| E9 | DC Fan Malfunction | Poor contact between the fan terminal connectors and the controller. | Connect the terminal connectors to the controller properly. |
| Malfunctioning fan. | Replace the fan. | ||
| Ec | Signal Communication Failure | Poor contact of the display screen cable. | Properly connect the display screen cable. |
| Damaged controller or display screen. | Replace the controller or display screen | ||
| EE | Power Failure Protection | Water supply or power was turned off, and then power was restored without turning off the flame. | Power off and then restart. |
| En | Timer Timeout |
Reset or switch off the timer |
Power off and then restart. |
If the error code still shown:
1. Turn off the hot water faucet and turn off the switch on the remote control.
2. Take care of the error code displayed and contact customer service to service@raneinrv.com for any assistance.
Troubleshooting tips.
Review the charts on the following pages first and you may not need to call for service.
This water heater incorporates a variety of shut off devices that prevents the operation of the water heater down if undesirable combustion condition occurs.
| Phenomenon | Cause | Handling method |
| Power indicator light does not light up | Whether there is a power failure | Use after the power comes on |
| Whether the power plug is loose | Plug in the power supply | |
| Power indicator is bad | Replace the power indicator | |
| No hot water comes out even after the hot water tap is opened | Is the gas valve and water inlet valve open | Open the gas valve and air inlet valve |
| Is there a water cut-off | Use after the water comes in | |
| Is the hot water faucet open too small | Turn up the hot water tap | |
| Whether it is frozen | Drain the freeze before use | |
| Is the gas meter (microcomputer-controlled gas meter) safe to operate | Troubleshoot before use | |
| Is the liquefied gas used up | Replace the gas cylinder | |
| Can not produce hot water with high temperature | Is the gas valve fully open, is the air pressure too low, is the water volume adjustment too large | Open the gas valve fully or check the air pressure and turn down the water valve |
| No hot water at lower temperature | Is the gas pressure too high, is the water volume too small | volume too small Check the air pressure, turn up the water flow or open the inlet valve and reset the temperature to the right level |
| The hot water faucet is closed too small and becomes cold water | The hot water faucet is closed too small, and becomes cold water when the water flowing out of the hot water faucet is below 3 kg/min, it will automatically turn off the fire | Turn on the water volume of the hot water faucet, the temperature of hot water will stabilize |
| Hot water does not flow out immediately after opening the hot water faucet | Since there is a certain distance between the water heater and the hot water faucet, it takes a certain amount of time for the hot water to flow out | Wait a little longer, hot water will flow automatically |
| The hot water that comes out is white and cloudy | This is due to the dissolved air in the water after the heat, the rapid decompression to atmospheric pressure when the phenomenon of small bubbles. It is harmless | phenomenon of small bubbles. It is harmless Normal phenomenon |
| White smoke is discharged from the exhaust port in the cold season | In winter, the exhaust gas contains a certain amount of water vapor, so you can see white smoke. | Normal phenomenon |
| Hot water becomes cold water after about 40 mins of continuous use | Timer protection function is in effect, the water heater automatically turns off the fire | Normal phenomenon, restart the machine |
| There is water flowing out of the safety valve | The tap water pressure exceeds the safe water pressure of the machine and the pressure is automatically released, not abnormal | Normal phenomenon, please close the water inlet valve |
| The fan will rotate for a period of time after the machine is turned off | The fan needs to work for a period of time to exhaust the exhaust gas in the machine to reduce the temperature inside the machine | Normal phenomenon |
| The hot water temperature will change when the power is off or unplugged | When the power is off or unplugged, the hot water set temperature will be restored to the factory set temperature when the power is turned on again. | Reset and use again |