909 SE EVERETT MALL WAY CRUCIBLE BREWERY 2025-03-28

5.6 Diagnostic Codes To display diagnostic codes: 'Frc o In Use Turn off the water heater by pressing the "On/Off' button. Q Press and hold the "On/Off'for 2 seconds and then the A (Up) button Appro "or TwM. simultaneously. The last nine maintenance codes display and flash one after the other. - o Priority To exit diagnostic codes and return the water heater to normal opperation, press and hold the "On/Off' button for 2 seconds and then the ` (Up) Hot water temp button simultaneously. - a On/Off Turn on the water heater by pressing the "On/Off' button. �iausw Figure 78 A WARNING Some of the checks below should be performed by a licensed professional. Consumers should never attempt any action that they are not qualified to perform. Power interruption during bath fill 7 FNOgnion (Heater Not Turning O(Water will not flow when power returns) ck that the gas is turned on at the Turn off all hot water taps. Press ON/ r heater, meter, or cylinder. OFF twice. e system is propane, make sure that gas is in the tank. By-Pass Flow Control Ensure gas type and inlet gas pressure • Measure resistance values of the by- are correct. pass flow control.* Bleed all air from gas lines. Replace By-Pass flow control device. Check the ground wire for the PC Board. Air Supply or Exhaust Blockage/ Ensure flame rod wire is connected. Condensate Trap is Full Ensure igniter is operational.* Check gas solenoid valves for open or Ensure condensate line is not blocked. short circuits.* Ensure internal air filter is clean with Verify gas orifice is correct. no obstructions. (Indoor Water Heaters 7 ffoFflae Only) Ensure High Altitude setting. See ck that the gas is turned on at the 9 g. ( r heater, gas meter, or cylinder. Parameter Settings) system is propane, make sure that Ensure Combustion air and Exhaust gs in the tank. vents are not blocked and approved Ensure flame rod wire is connected. venting materials are being used. Ensure gas type and inlet gas pressure (Indoor Water Heaters Only) is correct. Ensure vent length is within limits. Bleed all air from gas lines. (Indoor Water Heaters Only) Heat Exchanger Overheat Check fan for debris and ensure wheel Measure resistance of Overheat Switch.* turns freely. Check heat exchanger surface for hot • Verify check valve is not stuck between spots which indicate blockage due to fan casingand burner body. scale build-up. Y Refer to instructions in manual for flushing heat exchanger. Hard water * See "Electrical Diagnostics" on Technical Data must be treated to prevent scale build up Sheet located on inside front cover of water heater. or damage to the heat exchanger. Ensure it is not in forced Hi setting. Rinnai Tankless Water Heater Installation and Operation Manual 77