Rheem IKONIC RTGH-S11i Training And Service Manual
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Rheem IKONIC RTGH-S11i Training And Service Manual

Tankless water heaters
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TECHNICAL TRAINING AND
SERVICE MANUAL
TANKLESS
WATER HEATERS
RTGH-S11i
RTGH-SR11i
CRTGH-S11i
CRTGH-SR11i
RUTGH-S11i
RUTGH-SR11i
CRUTGH-S11i
RTGH-S10i
RTGH-SR10i
CRTGH-S10i
CRTGH-SR10i
RUTGH-S10i
RUTGH-SR10i
CRUTGH-SR11i
RTGH-S84i
RTGH-SR84i
CRTGH-S84i
CRTGH-SR84i
RUTGH-S84i
RUTGH-SR84i
AP23209 Rev 02

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Summary of Contents for Rheem IKONIC RTGH-S11i

  • Page 1 TECHNICAL TRAINING AND SERVICE MANUAL G I N E E R I N G C E N T E R TANKLESS WATER HEATERS RTGH-S11i RTGH-S10i RTGH-S84i RTGH-SR11i RTGH-SR10i RTGH-SR84i CRTGH-S11i CRTGH-S10i CRTGH-S84i CRTGH-SR11i CRTGH-SR10i CRTGH-SR84i RUTGH-S11i RUTGH-S10i RUTGH-S84i RUTGH-SR11i RUTGH-SR10i RUTGH-SR84i CRUTGH-S11i CRUTGH-SR11i...

  • Page 2: Table Of Contents

    SERVICE MENU ITEMS DESCRIPTION ....................... 32 VIEWING ACTIVE ALARMS........................... 33 CLEARING THE CURRENT ALARMS ........................34 TECHNICAL SUPPORT LINE Phone: 800-432-8373 Fax: 334-260-1341 ORDER CENTER 1-800-621-5622 RHEEM WATER HEATERS 800 Instestate Park Dr. Montgomery, AL 36109 Website: www.Rheem.com e-mail: Techserv@Rheem.com...
  • Page 3 IKONIC Tankless Water Heater Service Manual CONTENTS RESET THE DEFAULT SETTINGS ........................35 RESET WIFI SETTING ............................36 ERROR CODE DIAGNOSTICS ......................37 NO ERROR CODE AND NO HOT WATER / WATER FLOW SENSOR ..............37 ERROR CODE LIST ............................... 38 HOW TO REMOVE COMPONENTS ....................67 REMOVE FRONT COVER .............................

  • Page 4: Safety And Introduction

    IKONIC Tankless Water Heater Service Manual SAFETY AND INTRODUCTION FLAMMABLE LIQUIDS AND The purpose of this manual is to provide technical and troubleshooting information to technicians and service VAPORS professionals ONLY. Homeowners should consult the Use and Care Manual ( AP22745) for general informa- Gasoline, as well as other flammable material and liquids tional and installation inquiries or contact technical (adhesives, solvents, etc.), and their vapors are extremely...

  • Page 5: Troubleshooting Tools

    IKONIC Tankless Water Heater Service Manual TROUBLESHOOTING TOOLS SAFETY FIRST Your safety and safety of others is very impor- tant. This manual is only intended for qualified service technicians. ALWAYS USE CAUTION while testing voltages and/or gas supply. MULTI-METER MULTI-METER MANOMETER NEEDLE LEADS NEEDLE SET...

  • Page 6: General Information

    IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION GENERAL PRODUCT INFORMATION CROSSOVER VALVE NOTE: DO NOT install multiple crossover valves when using only one Tankless Water Heater. The crossover valve (Grundfos RTG20285 ONLY) should be located at the farthest faucet and has a flow rate of approximately 1.0 GPM.

  • Page 7: Pressure Drop And Temperature Rise Curve

    IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION Pressure Drop Curve IKONIC PRESSURE DROP 199k Btu/h 180k Btu/h 157k Btu/h NOTE: Pressure drop curve for IKONIC is different from existing condensing model. See table below for IKONIC Pressure Drop information. Pressure Drop Curve 199k Btu/h 180k Btu/h...

  • Page 8: Gas / Condensation

    IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION Proper gas size is imperative, as this unit may be able to get sufficient gas but other appliances on the same " gas line will not. This could cause issues throughout (440 mm) the home.

  • Page 9: Specifications

    IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.1.1 SPECIFICATIONS RTGH-S11i RTGH-S10i RTGH-S84i SPECIFICATION RTGH-SR11i RTGH-SR10i RTGH-SR84i Width 17.3 in (440 mm) Dimensions Height 28.6 in (726 mm) Depth 13.7 in (348 mm) Approval Gas Type Natural (NG) and Liquid Propane (LP) Maximum Gas Consumption 199,900 Btu/h 180,000 Btu/h...

  • Page 10: Specification And Installation Guidelines

    IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION SPECIFICATIONS OF THE IKONIC AND INSTALLATION GUIDELINES TOP VIEW FRONT VIEW " Air Intake Exhaust Vent (116 mm) " (899 mm) " (440 mm) " (170 mm) " (116 mm) " (899 mm) "...

  • Page 11: Direct-Vent Gas Components

    IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION DIRECT-VENT GAS COMPONENTS Ref # Description Ref # Description Control Board Air Intake Connector Gas Valve Flue Connector Burner Mesh Front Cover Blower Assembly Cabinet Venturi Exhaust Duct Assembly Gas Inlet Connector Gas Orifice Block Water Control Valve Burner Header...

  • Page 12: Direct-Vent Gas Components Recirculation Model

    IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION DIRECT-VENT GAS COMPONENTS RECIRCULATION MODEL Ref # Description Ref # Description Control Board Front Cover Gas Valve Cabinet Burner Mesh Exhaust Duct Assembly Blower Assembly Gas Orifice Block Venturi Burner Header Gas Inlet Connector Gas Inlet Pipe Water Control Valve Recirculation Connector...
  • Page 13 IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION SPECIFICATIONS OF THE IKONIC AND INSTALLATION GUIDELINES 1.1.2 VENTING FOR WATER HEATER The vent exhaust and air intake shall terminate outside The fittings other than the VENT TERMINAL should be as described in these instructions for direct vent ap- equivalent to the following: plication.
  • Page 14 IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION SPECIFICATIONS OF THE IKONIC AND INSTALLATION GUIDELINES 1.1.3 FLOW RATE RTGH S11i ( SR11i) TEMPERATURE RISE (°F) 11.2 Max Water Flow - GPM (gallons per minute) RTGH S10i ( SR10i) TEMPERATURE RISE (°F) 10.1 Max Water Flow - GPM (gallons per minute) RTGH S84i (SR84i)

  • Page 15: Control Board Connectors

    IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.2 CONTROL BOARD CONNECTORS *** GAS CHIP*** When replacing Control Board, you must use the original chip on the new Control Board. New Control Board must be pro- grammed. CONNECTOR# MOLEX COLOR WIRE COLOR White White, Black, White, Black...

  • Page 16: Diagnostic Points On Control Board

    IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.3 DIAGNOSTIC POINTS ON CONTROL BOARD CONNECTION # WIRE COLOR NORMAL VALUE WHAT ARE YOU CHECKING? Do you have power to the control W1-BK2 AC 108 - 132 V board? W3-BK4 AC 108 - 132 V Do you have power to the pump? GY1-GY4 AC 108 - 132 V...
  • Page 17 IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.3 DIAGNOSTIC POINTS ON CONTROL BOARD CONNECTION # WIRE COLOR NORMAL VALUE WHAT ARE YOU CHECKING? W6 - BL4 DC 144 - 192 V Does the fan motor have the proper voltage? DC 4 - 10 V Y1 - BL4 Is the fan motor producing regular pulse?

  • Page 18: Lcd On The User Interface / Setting To Enable And Disable

    IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.4 LCD ON THE USER INTERFACE This Tankless water Heater has the Liquid Crystal Dis- play (LCD) on the user interface. This user interface allows you to adjust the water tem- perature and view the operating status or error codes. Blower On Cloud Connectivity Recirculation On...

  • Page 19: Setting Operation Mode

    IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.4.2 SETTING OPERATION MODE This tankless water heater can set the operation mode with the Liquid Crystal Display (LCD) on the User Inter- face. 1. Display may need to be unlocked before the set- tings can be changed.

  • Page 20: Status Menu Items Description / Tankless Status

    IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.5 STATUS MENU ITEMS DESCRIPTION This tankless water heater can show the operating sta- tus with the LCD on the User Interface. STATUS TANKLESS STATUS WIFI STATUS Current water heater Current WiFi mode of mode of operating operating 1.5.1 TANKLESS STATUS...

  • Page 21: Quick Look Mode

    IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION QUICK LOOK MODE Press and hold the “STATUS” Button for 5 seconds to access Quick Look Mode. Water Inlet Temperature, Water Outlet Temperature and Flow Rate values will be displayed on the screen se- quentially.

  • Page 22: Wifi Status / Wifi Setting

    IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.5.2 WIFI STATUS 3. Press the “▲” or “▼” button to navigate through 2. To set up the WiFi connection, press “ENTER.” The the menu items. The status menu items are below: WiFi signal is broadcasted for 30 minutes and the user should download and use the EcoNET Appli- cation, available on Android and iPhone, to contin-...

  • Page 23: Setting Menu Items Description

    BACK ENTER BACK ENTER BACK BACK ENTER BACK ENTER BACK ENTER SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 3.
  • Page 24 IKONIC Tankless Water Heater Service Manual SET POINT SET POINT BACK ENTER BACK ENTER SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE GENERAL INFORMATION 1.6.1 SETTING THE SET POINT TEMPERATURE 3. Now press the “ ▼ ” or “ ▲ ” button in the center 1.

  • Page 25: Setting Temperature Display / Setting Beep On Alarm

    SET POINT Recirc.Pump Modes Tankless Config Recirc.Pump Modes ENTER BACK ENTER BACK ENTER BACK ENTER BACK ENTER MODE SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.6.2 SETTING THE 1.6.3 SETTING BEEP...

  • Page 26: Network Instance / Tankless Configuration / Timer Mode

    SET POINT Tankle BACK ENTER BACK SETTINGS STATUS SERVICE MODE SETTINGS IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.6.4 TANKLESS 3. The Factory setting is “None”. Press the “▼” or “▲” button to select “Timer Perf” or “Timer E Sav- CONFIGURATION er”...

  • Page 27: Recirculation Operation Timer Mode

    " BACK " RECIRCULATION OPERATION ON button until the initial screen. Redo from step 1. DEMAND The following accessories are needed to use the On Demand recirculation activation. RHEEM PART Tankless Config Recirc.Pump Modes DESCRIPTION NUMBER ENTER...

  • Page 28: Recirculation Operation On Demand / Schedule Mode

    IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.6.4.1.3 SCHEDULE MODE 4. The Factory setting is "None.” Press the “▼” or “▲” button until “Schedule” is displayed, and press “ENTER" to confirm. To exit this setting, press 1. Press the “ SETTINGS ” button. "BACK"...

  • Page 29: Recirculation Operation Manually Operate Pump

    IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION SET POINT Tankless Config Recirc.Pump Modes BACK ENTER BACK ENTER BACK ENTER SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE 2. Press the “ ▼ ” or “ ▲ ” button until "Tankless Con- RECIRCULATION OPERATION fig."...
  • Page 30 Tankless Config ALTITUDE BACK ENTER BACK ENTER SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 4. The factory setting is “ Sea Level Press the “▼” or 3. Press the “▼” or “▲” button until "Water Saver “▲”...

  • Page 31: Setting Manifold Heaters

    IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.6.5 NETWORK INSTANCE 2. Press the “▼” or “▲” button until "Tankless Con- fig” is displayed, and press "ENTER" to confirm. 1. Press the “ SETTINGS ” button. Tankless Config Recirc.Pump Modes ENTER BACK ENTER...

  • Page 32: Service Menu Items Description

    IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.7 SERVICE MENU ITEMS DESCRIPTION This tankless water heater can set several operations and display all service information of this water heater with the Liquid Crystal Display (LCD) on the User Interface. SERVICE TOTAL PUMP HOURS: MAX INPUT RATE:...

  • Page 33: Viewing Active Alarms

    SET POINT BACK ENTER SETTINGS STATUS SERVICE MODE IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.7.1 VIEWING ACTIVE ALARMS 2. Press the “▼” or “▲” button until "Yes" is dis- played, and press the “ENTER” To exit this setting, press “BACK”...

  • Page 34: Clearing The Current Alarms

    IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION CLEARING HISTORICAL 1.7.3 MANIFOLD ROTATE ALARMS This tankless water heater can be set to rotate the "Manager" unit in a manifold system by completing the 1. Redo from above step.2, and press the “▼” or following steps: “▲”...

  • Page 35: Reset The Default Settings

    IKONIC Tankless Water Heater Service Manual GENERAL INFORMATION 1.7.4 RESET THE DEFAULT 1.7.5 SETTING SERVICE ALERTS SETTINGS Service alerts remind users of water heater mainte- nance activities such as flushing the heat exchanger This tankless water heater can be reset to the default or replacing the water treatment filter (if applicable) in settings of the water heater by completing the follow- order to maximize the life of your tankless water heater.

  • Page 36: Reset Wifi Setting

    ENTER BACK ENTER BACK ENTER RVICE MODE SETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE IKONIC Tankless Water Heater Service Manual WiFi Setup? SET POINT WiFi Status GENERAL INFORMATION BACK ENTER BACK ENTER BACK ENTER ETTINGS STATUS SERVICE MODE SETTINGS STATUS SERVICE MODE...

  • Page 37: Error Code Diagnostics

    IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.1 NO ERROR CODE AND NO HOT WATER EXPLANATION WATER FLOW SENSOR No hot water is delivered when water is flowing through 1. Use cold water shutoff valve to turn OFF water sup- unit and with LCD displaying the hot water temperature ply to unit.

  • Page 38: Error Code List

    IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A031 ERROR CODE Diagnostic Check Inlet Thermistor Malfunction. Inlet Thermistor. Turn Power OFF Remove connector "I". Measure resistance on connector "I" between #5 wire (Black) & #7 wire (White) Reconnect connector "I"...
  • Page 39 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A032 ERROR CODE Diagnostic Check Heat Exchanger Thermistor Malfunction. Heat Exchanger Thermistor. Turn Power OFF Remove connector "H". Measure resistance between #1 wire (Blue) & #11 wire (Yellow) Reinsert connector "H".
  • Page 40 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A033 ERROR CODE Diagnostic Check Outlet Thermistor Malfunction. Outlet Thermistor. Turn Power OFF Remove connector "H". Measure resistance between #1 (Blue) & #11 wire (Yellow) Reconnect connector "H". Operate unit. The resistance is If Error Code A033 appears: Replace control 7K - 23K Ohms?
  • Page 41 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A2## ERROR CODE WATER HEATER COMM. FAILURE INSTANCE ## (## IS NO.02 TO NO,20) EXPLANATION DIAGNOSTIC CHECK ITEMS This water heater can manifold up to 20 units. In this •...
  • Page 42 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A036 ERROR CODE Diagnostic Check Exhaust Thermistor Malfunction. Exhaust Thermistor. Turn Power OFF Remove connector "H". Measure resistance between #4 wire (Red) & #11 wire (Yellow) Reinsert connector "H". The resistance is Operate unit.
  • Page 43 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A035 ERROR CODE Diagnostic Check Improper thermistor connection • Inlet thermistor This tankless water heater has three thermistors (Inlet, • Outlet thermistor Outlet and Heat exchanger thermistor) •...
  • Page 44 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A014 ERROR CODE Diagnostic Check Over Heat Limiter (OHL) activated. • Over Heat Limiter (OHL) This tankless water heater has an Over Heat Limiter • Over Heat Limit fuse (OHLF) (OHL) and an Over Heat Limit Fuse (OHLF).
  • Page 45 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A011 ERROR CODE Check Method Flame Not Detected From Flame Rod. Gas supply pressure In the case of ignition failure, the water heater will at- 1. Check the gas supply pressure and regulator at the tempt ignition 10 times (Including the post purge every gas connection of the water heater.
  • Page 46 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A011 ERROR CODE Turn Power OFF Flame Not Detected From Flame Rod. Air Filter Remove & reinsert white molex connec- tor on left of Igniter coil & black insulated Check with the air filter at the inlet air igniter cable on igniter rod.
  • Page 47 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A011 ERROR CODE Gas air ratio valve Flame Not Detected From Flame Rod. If the spark is not visible through the sight glass, refer to the steps to check gas air ratio valve. Flame rod (Flame is visible) To check gas air ratio valve, please refer to "A071"...
  • Page 48 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A012 ERROR CODE Gas filter Unit Detected Flame and Lost It. Check with the gas filter at the gas connection of the water heater that filter is not blocked by some foreign If the water heater detects loss of flame during combus- substance.
  • Page 49 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A012 ERROR CODE Flame rod (Flame is visible) Unit Detected Flame and Lost It. Check the gas supply pressure at the gas connection of the water heater. Venting Check the condition of venting (Exp.
  • Page 50 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A071 ERROR CODE Turn Power OFF Gas Air ratio valve malfunction. If the flame rod is detecting a flame for 8 Remove connector "C" and "H" terminal on flame rod, and reinsert them.
  • Page 51 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A061 ERROR CODE Diagnostic check items This water heater checks the RPM signal after the fan stars to run. • Blower motor If the RPM signal is incorrect after the fan to run, the water heater displays the “A061 ”...
  • Page 52 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A070 ERROR CODE Diagnostic check items Microcomputer Abnormality. • Control board If the microcomputer on the control board is not work- ing properly, the water heater displays the “A070” error code on the User Interface.
  • Page 53 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A072 ERROR CODE Turn Power OFF Flame rod malfunction If the flame rod detects presence of Remove connector "H" and terminal on flame rod, and reinsert them. flame before ignitor is activated, the water heater displays the “...
  • Page 54 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A082 ERROR CODE Turn Power OFF Installed Chip Error This tankless water heater has a gas chip Confirm that the correct gas chip is installed. on the control board. If the gas chip has a poor connection or the data that gas chip has is inadequate/wrong, the water heater displays the "A082"...
  • Page 55 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A090 ERROR CODE Gas supply pressure Detected Blockage in Venting 1. Check the gas supply pressure at the gas connec- tion of the water heater. If the water heater detects a blockage in the venting, the water heater displays the “A090”...
  • Page 56 NOTE: Flushing instructions utilize a submers- ible utility pump. Lime build-up inside the heat exchanger (Provided with the Rheem/Ruud Tankless To prevent permanent damage to the unit, the unit must Flush Kit - RTG20124) be drained and flushed. Flushing procedure may need to be repeated for excessive lime and scale build up.
  • Page 57 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A065 ERROR CODE Diagnostic check items Water volume control valve malfunction The water volume control valve will only activate IF de- • Water volume control valve. mand for hot water EXCEEDS the unit’s limitations. If water flow is within the unit’s limitations, you will not get a voltage reading for diagnostics.
  • Page 58 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A066 ERROR CODE Diagnostic check items Water bypass control valve malfunction If the bypass valve motor does not work properly, the • Water Bypass control valve. water heater displays the “A066” error code on the User Interface.
  • Page 59 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A055 ERROR CODE Diagnostic check items Gas motor failed. The venturi in this water heater has a butterfly valve to • Gas control motor on the Venturi assembly control air volume.
  • Page 60 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A029 ERROR CODE Diagnostic check items Condensate blockage This water heater has a built in condensate trap. If the • External condensate trap. electrode on this condensate trap detects the water •...
  • Page 61 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A063 ERROR CODE Diagnostic check Pump abnormality If the water flow sensor does not detect water flow • Recirculation Pump (Internal or external). when the recirculation pump is working, the water heater displays the "A063 ”...
  • Page 62 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST A200 ERROR CODE Translator to Water Heater Communication Failure. User Interface is not communicating with control board. Diagnostic check items • User interface. Turn Power OFF Remove and reinsert connector "E" and the molex connected to user interface.
  • Page 63 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST T110 ERROR CODE WiFi chip communication error If the WiFi chip is not communicating with the user interface, the water heater displays the “ T110 ” error code on the user interface.
  • Page 64 Crystal Display (LCD) on the user interface. mersible utility pump. (Provided with the This is a warning code and the unit will eventually shut Rheem/Ruud Tankless Flush kit RTG20124). down to protect unit. After flush procedure has been done. Clear current alarm.
  • Page 65 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST T113 ERROR CODE Check method The flow rate is less than 0.4 GPM through the water • The water filter and the hot & cold supply line may heater and the heater is not activating.
  • Page 66 IKONIC Tankless Water Heater Service Manual ERROR CODE DIAGNOSTICS 2.2 ERROR CODE LIST T115 ERROR CODE T116 ERROR CODE Pump schedule disable - No time received. Manifold unit fault. If the user interface does not receive the scheduled If the water heaters are installed in a manifold and time to operate the pump when a schedule has been some units in the manifold cannot communicate to the set (if installed with a recirculation line) the water heater...

  • Page 67: How To Remove Components

    IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.1 FRONT AND PLASTIC SCREW COVER The plastic screw covers are located top and bottom on the front cover. Press and release these parts indicated by the arrows below. REMOVE FRONT COVER The front cover is tightened by 4 screws.

  • Page 68: Gas-Air Ratio Valve

    IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.2 GAS-AIR RATIO VALVE 1. Remove 3 screws connected to gas orifice block 2. Remove quick fastener connected gas-air ratio and 2 screws connected to gas-air ratio valve valve and gas connected pipe. bracket.

  • Page 69: Flame Rod

    IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.3 FLAME ROD NOTE: When reassembling flame rod, please 1. Remove the hook film part of the Over Heat Limiter (OHL ). DO NOT cut the film. use a spare gasket if the condition of the gas- ket is not good.

  • Page 70: Gasket

    IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.4 GASKET 1. Remove the hook film part of the Over Heat Limiter 3. Remove 3 screws from flame rod bracket, and pull (OHL ). DO NOT cut the film. the flame rod 4.

  • Page 71: Water Inlet Connection 3/4

    IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.5 WATER INLET CONNECTION ¾" NOTE: Before removing water inlet connection, turn off water to the water heater by closing the shut off valve and drain the heater. 1. Remove 3 screw from the bottom plate, as pictured 3.

  • Page 72: Water Control Valve

    IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.6 WATER CONTROL VALVE NOTE: Before removing water inlet connec- 4. Remove quick fastener connected to check valve. tion, turn off water to the water heater by closing the shut off valve and drain the heater. 1.

  • Page 73: Bypass Valve

    IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.7 BYPASS VALVE NOTE: : Before removing water inlet connec- 6. Remove fastener to check valve. tion, turn off water to the water heater by closing the shut off valve and drain the heater. 1.

  • Page 74: Neutralizer / Outlet Thermistor

    IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.8 CONDENSATE TRAP 3.9 OUTLET THERMISTOR NOTE: Before removing outlet thermistor, turn 1. Remove control board and display. off water to the water heater by closing the NOTE: To remove the control board and dis- shut off valve and drain the water heater.

  • Page 75: Igniter Coil / Igniter Rod

    IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.10 IGNITER COIL 3.11 IGNITER ROD 1. Remove the hook film part of the Over Heat Limiter 1. Remove the hook film part of the Over Heat Limiter (OHL). (OHL). NOTE: DO NOT cut the film.

  • Page 76: Blower

    IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.12 BLOWER NOTE: After removing the gas orifice block, 1. Remove fan control wiring harness from control board (Connector “D”) and wire holder from the secure four (4) gaskets in a safe location to avoid loss.

  • Page 77: Display Only

    IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.12 BLOWER CONT'D 7. Remove three screws and Venturi assembly. 3.13 DISPLAY ONLY 1. Remove top center screw from the display mount- 2. Remove connector connected to display. (Located ing bracket, and the screw located at the bottom of at left side of display).

  • Page 78: Display With Display Mounting Bracket / Control Board Only

    IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.13 DISPLAY WITH DISPLAY MOUNTING BRACKET 1. Remove two screws located at the bottom of the 2. Remove the connector “E” from the control board. unit. 3.14 CONTROL BOARD ONLY 1.

  • Page 79: Control Board Only / Power Cord

    IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.14 CONTROL BOARD BRACKET 3.15 POWER CORD 1. Remove all 9 connectors from the control board. 1. Locate YELLOW Molex connector attached to power cord. 2. Remove top center screw from control board- 2.

  • Page 80: Thermistor Wiring Harness

    IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.16 THERMISTOR WIRING HARNESS 1. Remove connector “I” from control board. 4. Remove BLACK Molex connector connected to outlet thermistor and YELLOW Molex connector 2. Remove display, and control board with bracket connected to heat exchanger thermistor.

  • Page 81: Gas Control Wiring Harness

    IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.17 THERMISTOR WIRING 3.18 GAS CONTROL WIRING HARNESS HARNESS NOTE: Before removing outlet thermistor, turn 1. Remove connector “J” from control board and de- off water to the water heater by closing the tach control board with bracket from water heater.

  • Page 82: Fan Control Wiring Harness

    IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.19 FAN CONTROL WIRING 3.20 HIGH VOLTAGE GROUND HARNESS WIRING 1. Remove two (2) Molex connectors; one (1) on the 1. Remove the screw on the bracket and the cable on blower, and D on the control board.

  • Page 83: Power Control Wiring Harness

    IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.21 POWER CONTROL WIRING HARNESS 1. Remove total of three (3) screws; one (1) screw on 3. Shift the control board and locate total of four (4) the bracket on top, and two (2) screws below to Molex connectors;...

  • Page 84: Display Control Wiring Harness

    IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.22 DISPLAY CONTROL WIRING HARNESS 1. Remove the WHITE connector on the left side of the display. 2. Remove the connector E.

  • Page 85: Orifice Plate (Nat/Lp)

    IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.23 ORIFICE PLATE (NAT/LP) NOTE: Arrows on the front plate of the gas 1. Locate the solenoid valve shown in figure below and remove the connector with BLACK and YEL- orifice block shows the screws that needs to be removed.
  • Page 86 IKONIC Tankless Water Heater Service Manual HOW TO REMOVE COMPONENTS 3.23 ORIFICE PLATE (NAT/LP) NOTE: Install the orifice plate in the right 8. Place two (2) gaskets on the LP (or NAT) orifice plate. orientation. To ensure a leak free joint verify both gaskets on the orifice plate and both on gas valve is in place and are in good condi- tion, before attaching the gas orifice block.

  • Page 87: How To Connect

    IKONIC Tankless Water Heater Service Manual HOW TO CONNECT CONNECTING TO WIFI 1. Scan the QR Code located on the side of the heater 4. Select “Add Product on the Home screen. to download the EcoNet application. 2. Press WiFi Set up on the unit to begin connecting. 5.
  • Page 88 6. If using current location, select “ALLOW” when 8. Go to the WiFi settings on your phone, and connect prompted to allow Rheem EcoNet to access your to the EcoNet network for your device. location while you are using the application.
  • Page 89 IKONIC Tankless Water Heater Service Manual HOW TO CONNECT CONNECTING TO WIFI 11. Once connected, the user may fill in the preferenc- es, customizations, and contractor information. 12. Go to Settings, select Account, then select Notifi- cation Settings to adjust preferences. 13.

  • Page 90: Diagnostic Mode

    1. Press the Wi Fi step up button until the unit beeps reconnect to the WiFi after thirty minutes. and the Wi Fi LED blinks blue. 2. From the Rheem contractor app click on the set- tings icon and select diagnostics Info. 3. Press the connect button in the app.
  • Page 91 IKONIC Tankless Water Heater Service Manual NOTES...
  • Page 92 TECHNICAL SUPPORT LINE Phone: 800-432-8373 Fax: 334-260-1341 ORDER CENTER 1-800-621-5622 RHEEM WATER HEATERS 800 Instestate Park Dr. Montgomery, AL 36109 Website: www.Rheem.com e-mail: Techserv@Rheem.com...

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