Rinnai gas boilers, like several others, are prone to malfunctions. Therefore, manufacturers have provided a self-diagnosis system. In the event of a malfunction, a code is displayed on the display that indicates the cause. In order to get rid of the problem faster, we will present all the errors of the Rinnay boiler, their decoding and solutions.
The device and features of the boiler
Rinnai-made Japanese boilers are closed type appliances. These are turbocharged units in which a fan operates to force the removal of combustion products. Coaxial chimney fumes supply combustion air and fumes.
The ignition unit is in the center of the structure. The burner cuts the flame into three parts, so the heat exchanger is evenly heated. At the same time, the flame is capable of modulating in three modes. For example, in the summer you can turn on only one part, saving on fuel.
The product includes two copper heat exchangers: one works for heating, the other for hot water supply (DHW). A three-way valve switches heating from one system to another. Inside is an 8.5 liter expansion tank.
Below is a circulation pump. Its rotor is dry, which contributes to the long operation of the node. It provides circulation of the coolant through the system. Remote control or keyboard. In the presence of a display where the temperature and other indicators are reflected.
Fault Codes
What should I do if an error is displayed on the display of the device? First of all, restart the boiler, there may have been a system failure. If the symbols did not disappear after the reboot, then proceed to troubleshoot.
Error code | Value | Do-it-yourself troubleshooting |
7 | Prolonged use of hot water (more than 8 hours). | Ensure that the water valve and flow switch are working properly. Check for voltage at the ends of CN 9 of the main module. |
11 | Problems with ignition. There is no flame in the burner, or it is not recognized, immediately goes out. | How to fix the situation:
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12 | The fire goes out after 20 attempts of ignition. | What you need to check:
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14 | Thermal fuse breakdown. | Inspect the terminals and wires of the fuse, check the sensor for a short circuit. Replace control module. |
15 | Overheating sensor is out of order. The presence of flame in the absence of water in the radiator. | Remedy:
Restart the boiler. Try the water temperature on and off. |
16 | Water overheating. Damage to the sensor when determining the temperature of more than 95 degrees in three seconds. | Blow excess air out of the system. Is the three-way valve, pump working properly. Clean the water filter or pipes. |
17 | Flow. The recharge signal is triggered for 64 hours more than 3 times. | Inspect components, pipes, and connections for leaks. Ensure that air is discharged from the system. |
18 | Grounding has worked. The voltage in the line of the main unit has shifted by 5 watts. | Damaged wires, broken insulation. Replacement or repair required. Voltage measurement between CN3 on the board and the ground line. |
20 | Incorrect DIP switch location. | Change the location. |
28 | The remote control is malfunctioning. | Replace the batteries. |
31 | Damage to the heating thermostat. | Diagnose the thermistor for a short circuit. Set a new item. |
32 | Problems with the air thermistor. | Check the sensor contacts, replace the faulty wiring or the sensor itself. |
33 | Malfunction of thermistor temperature direct water supply. | |
34 | The DHW thermistor is damaged. | |
35 | Incorrect operation of an external thermistor. | |
36 | There is a problem with the low temperature thermostat. | |
43 | Low water level in the system. | Diagnostics of the level sensor for serviceability, valve for make-up for serviceability. If everything is in order, add the required amount of water. |
52 | The proportional valve does not work. | Measuring voltage across the valve coil. |
56/71 | Problems with the electronic valve. | Diagnostics of the valve and water level sensor. |
59 | The equipment has overheated. | Fuse Replacement. |
61 | The fan motor is broken, or the rotation speed is not controlled. | Disassemble the device, and measure the voltage of the windings. A new fan is installed. |
72 | The ionization sensor is out of order. A flame is detected, although no fuel is supplied. | Inspection of the main unit. |
89 | The system detected complete freezing. | Check how air is supplied from the chimney, for clogged heat exchanger. Replace the faulty thermistor. |
90 | Fan check failed. | Inspection and replacement of the fan. Cleaning the chimney, radiator from soot and dirt. |
96 | Problems with the first start of hot water. | Make sure that water is supplied properly. |
97 | Problems starting the heating of the gas boiler. | |
Error Code 99 | Combustion products are poorly discharged. | Inspection of the chimney tightness, clogging, fan repair. If you notice that the burner indicator is blinking on the panel, it means that hot and cold water taps are working. If the heating indicator blinks, it is necessary to clean the filter from clogging. |
Stopping boiler equipment in the cold winter is an unpleasant situation. The room cools down, people freeze, the equipment also freezes. As a result, a complete replacement may be necessary. Therefore, carry out a routine inspection of the boiler every year. Clean the components from scale and dirt. Install water filters to prevent clogging. They reduce the concentration of salts, so deposits do not accumulate on the walls of parts.
We hope that thanks to the recommendations you will cope with breakdowns and spend the winter in warmth and comfort.