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TM090 12-26 Series II CFGWH Service Instructions
REV AB

– Issued February 2019

This document is stored and maintained electronically by Rheem Technical Support. All printed copies

are deemed “uncontrolled”

DOCUMENT REVISION HISTORY

Title: 12-26 Series II CFGWH Service Instructions

Document N

TM090

Revision

Details of change

D.O.I.

Service Manual Issued for revised 874/876T26 models

10/17

Service manual updated to include 12, 16 & 20L models

01/18

Addition of Live Testing warning; Solahart Solar Booster models;
EziSET

Smartphone remote control kit.

02/19

NOTE: Every care has been taken to ensure accuracy in preparation of this publication. No liability can be accepted for

any consequences which may arise as a result of its application.

Содержание 10143267

Страница 1: ...med uncontrolled Rheem Australia Pty Ltd ABN 21 098 823 511 12 26L Series II Continuous Flow Gas Water Heater TM090 Issued Oct 2017 Revision AB Issued Feb 2019 Rheem Solahart 874812XF 876812XF 874T16X...

Страница 2: ...2 TEMPERING VALVES 13 REMOTE CONTROLLERS 14 BATH FILL OPERATION 19 HOW TO FAULT FIND 21 OPERATIONAL FLOW CHARTS 23 ERROR CODES 26 DIAGNOSTIC TEST POINTS 27 MAINTENANCE INFORMATION 28 CLEARING ERROR CO...

Страница 3: ...ng symbol Take care to observe the recommended procedure Live Testing A number of test procedures detailed within this service instruction require live testing to be conducted All State and Territory...

Страница 4: ...ote The 2k resistor is used to simulate the body resistance of a typical person Diagram 2 Procedure Personal Protective Equipment electrical insulating gloves should be worn when conducting this proce...

Страница 5: ...J Model Number 8 Rheem Location 7 External Temperature Setting 4 75 C Max Temp 6 54 C Max Temp Heater Reference 8 High Efficiency T High Efficiency Metro series Capacity 12 12l m 25 C rise 16 16l m 25...

Страница 6: ...us spark Minimum working water pressure kPa 120 Maximum working water pressure kPa 1000 Relief Valve Pressure kPa 1750 Heating capacity L min 40 C rise 7 5 10 12 5 16 2 Output kW 21 27 9 34 9 45 3 Gas...

Страница 7: ...n the App in the event of a heater fault EziSET is not provided as standard with the CF heater it is an optional extra that is available to purchase in kit form that is to be retro fitted to a new or...

Страница 8: ...26 Series II CFGWH Service Instructions REV AB Issued February 2019 This document is stored and maintained electronically by Rheem Technical Support All printed copies are deemed uncontrolled 8 WIRING...

Страница 9: ...ls 38 C 40 C 42 C 43 C 45 C 48 C and 50 C Turn DIP SWITCHES 3 and 4 off down position The temperature display is now turned off 4 Refit the front cover to the water heater FINE TEMPERATURE ADJUSTMENT...

Страница 10: ...pre designated frequency at minimum flow rate the PCB 27 activates the Fan Motor 25 and the Fan 24 starts rotating 3 After the Fan 24 completes a pre purge the Gas Inlet Solenoid Valve 9 is activated...

Страница 11: ...19 Heat Exchanger 20 Over Temperature Limiter 21 Exhaust Flue Outlet 22 Combustion Chamber 23 Anti Frost Heater Models with F in model number only e g 874826NF 24 Fan 25 Fan Motor 26 Drain Plug With R...

Страница 12: ...edure 12 on page 56 for replacement procedure IN SERIES GAS BOOSTING Temperature controllers must not be fitted if this water heater is installed as part of a solar water heater system because water a...

Страница 13: ...lve is fitted and there is not a separate untempered line for the kitchen or laundry areas the Kitchen temperature controller will be able to display temperatures above 50oC however the delivered wate...

Страница 14: ...ers offer additional functions compared to standard temperature controllers A Bath Fill auto stop function allows the bath fill volume and temperature to be set once the selected volume of water has p...

Страница 15: ...st one must be on for the water heater to operate If all controllers are off the water heater will only deliver cold water Note 2 The water volume button is active only on the kitchen controller Selec...

Страница 16: ...The x10l symbol glows when the water volume is displayed up button The up button increases the temperature setting down button The down button decreases the temperature setting water volume button Ki...

Страница 17: ...be on for the water heater to operate If all controllers are off the water heater will only deliver cold water Selectable Temperatures Deluxe Kitchen Controller 37 38 39 40 41 42 43 44 45 46 48 50 60...

Страница 18: ...up button Increases the Bath Fill water volume setting in increments of 10 litres up to 500 litres A further setting of 990 litres can be selected Bath Fill Water Volume down button Decreases the Bath...

Страница 19: ...e 65 Flashing Bath Fill lamp OFF Hot water tap closed Bath Fill lamp OFF Hot water volume Indicator OFF Hot water volume OFF Hot water temp Indicator OFF This section applies only when a Deluxe Remote...

Страница 20: ...es of non use the non use session timeout time can be adjusted from the SETTINGS page if desired At this point priority may be assumed by another device by depressing the HOT WATER button The Scan but...

Страница 21: ...n into 5 sections designated by boxed numbers The table on page 22 converts the sequence number displayed on the LED to the appropriate operational flow chart section The flow diagram below outlines t...

Страница 22: ...cled numbers adjacent to the component or function indicate the diagnostic test point required to diagnose the fault Refer to the table on page 27 By locating the Error Code displayed on the water hea...

Страница 23: ...On 4 NO YES 1 A YES 71 Flashing Vent type control data failure Failure of detection of fan motor current 79 Flashing 34 Flashing 14 Flashing 74 75 or 76 Flashing O H L Working Ambient air thermistor...

Страница 24: ...nlet thermistor disconnected Decrease of fan motor ventilation operation stop Heat exchanger thermistor disconnected Heat exchanger water temp 140 C O H L Working Thermistor connections crossed Hot wa...

Страница 25: ...3 failure 80 Flashing 8 seconds later NO G I S V SV0 failure 51 Flashing G I S V SVO off S V 1 3 SV1 3 off P G F R Valve off Fan off YES Abnormal combustion Decreased air flow NO 99 Flashing Fan off...

Страница 26: ...7 34 Ambient air thermistor open circuit Ambient air thermistor diagnostic point 8 35 Thermistor connections crossed Connection points of thermistors 51 Gas cut off malfunction SV0 failure G I S Valv...

Страница 27: ...kilo ohms Hot Water Outlet Thermistor 8 F BL11 BK9 5 C 12 5 kilo ohms 20 C 6 3 kilo ohms Ambient Air Thermistor 9 J R1 Earth AC 1V 170V 2 Flame Sensor detecting flame K GY1 Earth AC 1V 170V 2 10 I R6...

Страница 28: ...l combustion starts X 100 Total combustion operations since last error X 100 hours Null H Total combustion period X 1000 hrs Total combustion period since last error X 1 000 hours Null J Total combust...

Страница 29: ...tions REV AB Issued February 2019 This document is stored and maintained electronically by Rheem Technical Support All printed copies are deemed uncontrolled 29 PC Board PCB Dip Switches Min Button Ma...

Страница 30: ...ress the temperature increase and decrease buttons simultaneously for 3 seconds 3 Use Temperature decrease button to change the left digit 0 1etc in the LED display to the required maintenance code id...

Страница 31: ...ater is not flowing through the water heater 2 Turn off remote controllers if fitted 3 Ensure all DIP SWITCHES are in the off position down position 4 Turn DIP SWITCH 2 on up position and then off dow...

Страница 32: ...GWH Service Instructions REV AB Issued February 2019 This document is stored and maintained electronically by Rheem Technical Support All printed copies are deemed uncontrolled 32 FAULT FINDING A B C...

Страница 33: ...with a multimeter set on the AC voltage scale If the voltage is between 230V and 250V the cord set and fuses are ok Unplug connector I from the PCB and measure the resistance of the Over Heat Limiter...

Страница 34: ...mal fan voltage operating range No 3 Black to 4 Orange DC4 10V or measurement by pulse counter of not less than 4800 pulses per minute 3Black 5Yellow Normal operating resistance is 4 9 kilo ohms at 40...

Страница 35: ...Blue and 9 Black Conduct test with water flowing Measure the voltage between Earth and connectors J K plugged into PCB Normal voltage is between AC1 and 170V Test 10 PGFR Valve Test 11 Gas inlet solen...

Страница 36: ...on is approximately 3 seconds Conduct test with water flowing Measure the voltage with connector I plugged into PCB between 11 Black and 8 Red Measure the resistance with connector I unplugged from th...

Страница 37: ...11 Test solenoid 3 between 7 11 Conduct test with water flowing Measure the voltage with connector I plugged into PCB Reading DC 9 15 volts between 11 Black and 7 White Measure the resistance with con...

Страница 38: ...low flow charts 2 3 or 5 depending on the previous error codes displayed in the maintenance history accessed from the PCB 3 Ignition retry Turn on power to the water heater Turn on the controller usin...

Страница 39: ...ls Use an insulated tool when operating the DIP switch or MIN and MAX buttons Power Supply NO No power supply Check household wiring YES Test 1 Cordset open circuit replace Inline fuses open circuit r...

Страница 40: ...e and reinsert the gas type connector YES Gas type connector was originally not inserted correctly Faulty gas type connector replace YES NO Gas type connector malfunction 2 YES Remove connector L from...

Страница 41: ...l ok then replace the PCB assembly NO YES Thermistor error codes 31 Water inlet thermistor 32 Heat exchanger thermistor 33 Hot water outlet thermistor 34 Ambient air thermistor YES Replace the relevan...

Страница 42: ...st 9 NO Replace the PCB assembly NO YES Clean or replace the combustion chamber front panel assembly Flame detection problem Check condition of flame rod and leads Repair replace as necessary YES YES...

Страница 43: ...YES 3 2 Replace the proportional gas flow regulating valve assembly YES NO YES Test 11 YES YES YES Test 10 Replace the burner change over assembly NO Is gas available Is the gas pressure correct at th...

Страница 44: ...g the procedure in the section on Error Codes NO YES 3 2 Abnormal combustion YES NO NO Replace the relevant thermistor Adjust maximum and minimum burner pressures YES NO Combustion chamber and hot wat...

Страница 45: ...t 15 B After power is restored the water flow servo motor limiter should move to the fully open position NO Set the hot water temperature at 60 and fully open a hot water tap YES NO 5Y is the temperat...

Страница 46: ...egulating valve test normal Fan current detecting circuit failure 2 Replace the PCB assembly Note only replace the PCB assembly if error code 79 is displayed during combustion YES Is error code 79 dis...

Страница 47: ...isplay OFF YES NO Replace controller NO YES NO Test 15 A YES Turn hot tap off YES NO Normal operation YES Replace controller If fault persists replace the PCB assembly Replace controller NO YES Replac...

Страница 48: ...tphones that have a minimum operating system of iOS 8 1 iPhone 5 excluding iPhone 5C or Android 4 0 or later Windows phones are not compatible Power Line Telecommunication PLT Plug The EziSET kit incl...

Страница 49: ...power supply is not switched on Ensure PLT plugged in and GPO switched on LED 3 L3 Blue LED Flashing Normal Indicates active communication Solid No active communication Ensure PLT and router are plugg...

Страница 50: ...d 4 Open a hot tap slowly to achieve the minimum flow rate at which the burners will ignite 5 Press and hold the MIN button 1L is displayed on the LED and observe the reading on the manometer 6 Releas...

Страница 51: ...lay 7 Release the MIN and adjuster buttons when the minimum test point pressure shown on the manometer agrees with the rating label NOTE If the burners extinguish or an error code starts to flash on t...

Страница 52: ...t Panel Removal Procedure 2 1 Isolate power gas and water supplies 2 Remove the flue diverter if fitted Refer to procedure 1 3 Un clip the upper and lower plastic trims if fitted 4 Remove the four scr...

Страница 53: ...assemble in reverse order of above being careful not to pinch or damage wiring Replace gaskets if required 10 Test for gas leaks using soapy water solution PCB Assembly Procedure 5 1 Remove the front...

Страница 54: ...mble in reverse order of above 6 Replace the felt gaskets item 740 if required 7 Test for gas leaks using soapy water solution Proportional Gas Flow Regulating Valve Procedure 8 1 Remove the front pan...

Страница 55: ...loom 7 Remove 3 x external screws from the flange item 401 and carefully pull down to extract the brass housing 8 Remove the thermistor from the side of the Inlet valve secured with 2 x screws before...

Страница 56: ...ompound anti frost heaters from the inlet and outlet housings 4 Remove the Anti frost Heaters and wiring Some wiring retainers will need to be released to remove wiring 5 Reassemble in reverse of abov...

Страница 57: ...required Over Heat Limiter Assembly Procedure 16 1 Remove the upper burner Assembly Refer to Procedure 4 2 Remove the 4 x screws retaining the Over Heat Limiter Assembly to the Jacket back and remove...

Страница 58: ...cedures 2 3 4 5 2 Remove the three screws retaining the nozzle plate and remove nozzle plate 3 Reassemble in reverse order of above Replace gaskets if required 4 Test for gas leaks using soapy water s...

Страница 59: ...terminal D of the main PCB refer c 4 Disconnect the 2 x yellow wiring harnesses refer b 5 Remove the 2 x screws that fix the EziSET PCB to the back panel of the heater casing 6 Remove EziSET PCB by s...

Страница 60: ...uctions Document No TM090 Revision Details of change D O I 00 Service Manual Issued for revised 874 876T26 models 10 17 AA Service manual updated to include 12 16 20L models 01 18 AB Addition of Live...

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