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This is simply expansion noise from the heat exchanger. During Combustion: Clicking noise when the thermostat operates. This is the sound of the solenoid gas valves opening and closing. Unit is not heating room. Is the air filter blocked? Is the set temperature high enough? Is the warm air outlet blocked by anything? Are the doors and windows of the room closed? Was the appliance correctly sized for the space? Air filter is blocked or the louvers are blocked or obstructed. Heater will not re-ignite after overheating. Allow heater to cool, clean air filter, operate again. Even after unit has cooled down, the heater does not ignite again. Repair is necessary. Contact a qualified / authorized service provider. When the unit is turned off. Convection fan continues to run after turning OFF. This is to remove the residual heat from the heat exchanger. The fan will stop when the heater cools down. Other Points: Steam is discharged from the flue terminal . Unit shuts off without apparent reason. High efficiency appliances tend to discharge water vapor on cold days. This is normal. Check whether filters are blocked. Dirty filters will cause the heater to overheat. Rinnai Corporation EX17C / EX22C Manual Fault Codes If there is a malfunction the appliance may shut down as a safety precaution and display a fault code to assist in diagnosing the problem. The fault code will flash in the display on the control panel. When making a service call, this code will assist with diagnosing the fault. You may be able to clear the fault code by turning the heater off and then on again. If the fault code remains or returns on the next operation, contact Rinnai or your nearest service agent and arrange for a service call. CODE DISPLAYED FAULT REMEDY 11 [1] Ignition Failure Check that gas is turned ON. Check that the vent termination is not blocked. Refer to the Restart Function explanation. Service call if repeated. 14 Overheat Clean filter. Service call if repeated. [2] 16 Room Overheat Ensure that room temperature is less than 104°F (40°C). 31 Room Temperature Sensor Faulty Service call. 32 33 Overheat Temperature Sensor Faulty Service call. 34 49 Sensor Breakdown Service call. 53 Sparker Failure Service call. 61 Combustion Fan Failure Service call. 62 Convection Fan Failure Service call. 70 Faulty ON/OFF Switch or Faulty “Set back” Switch Service call. 71 Faulty Solenoids Service call. 72 Faulty Flame Rod Service call. 73 Communication Error Service call. 99 Flue Block Check around the flue terminal for blockage. [3] [1]Only this code is dim. [2]If the fusible link needs replacement, it must be done by a qualified service agency. In addition, the cause of the overheat needs to be determined. The fusible link is a one use safety device that breaks to shut off the appliance. [3]Remove any obstructions. The flue needs to be kept clear to expel exhaust gases. If the appliance fails to operate contact a qualified service agency. Rinnai Corporation EX17C / EX22C Manual Restart Function If there is a power failure while the appliance is on, then the appliance will start automatically when the power is restored. If the appliance fails to ignite, the appliance will attempt ignition after 1 hour. The “Ignition Failure” fault code, 11, will appear during that hour and disappears after a successful ignition. If ignition fails again, then the fault code will remain and another attempt to ignite will occur in 1 hour. The fault code is not stored in the fault code history. If the flame is extinguished during forced combustion then the appliance will attempt ignition after 1 hour. The “Ignition Failure” fault code, 11, will appear during that hour and disappears after a successful ignition. Forced combustion takes place for about 15 seconds before ignition. After this time, the temperature control logic controls the combustion. If the flame is extinguished (burner combustion failure) while the temperature control logic is operating the appliance, then the appliance will immediately attempt ignition. No fault code will appear. Troubleshooting Problem Cause No ON indicatorBurner doesn’t igniteUnusual combustionCombustion stopsduring operationSmell of gasNoisy ignitionTakes too long towarm the room Remedy Not Plugged In Plug In Power Failure Push On/Off button to attempt restart after power is restored. (Initial Installation) Air In Gas Pipe Purge air (Installer) Gas Filter Blocked Service Call Miss Ignition Service Call Flue terminal obstructed Clear obstruction Flue manifold not connected Service Call Louver obstructed Clear obstruction Air filter blocked Clean filter Gas Escape Service Call Child Lock Set Cancel Child Lock Gas turned off at meter, tank, or valve. Turn gas on ON Timer is set Cancel “ON” Timer or push override button Rinnai Corporation EX17C / EX22C Manual Installation Instructions Installation Instructions General Instructions WARNING Do not use substitute materials. Use only parts certified with the appliance. • A qualified ser...
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