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Service Manual - Jane and John`s Place!

1. 5 DISPLAY BOARD 2 15 4 DIVIDER HEATER E _ 1 12 TO TEMP SENSOR LIGHT ASSY 16 s 120V POWER BOARD 12 VOLT SPARK CONTROL VOLTAGE SEE 8A FLP GND FLP SENSE QP FANS _TO 12 VDC GAS 120V SUPPLY VALVE SS AC 12 V FAN D EE CHASSIS P3 f X GND DOOR FLAPPER HEATER DOOR HEATERS SWITCHES PART NO 618805A Figure 47 1200XX 120X IMXX wiring pictorial SN 832170 and below www norcold com cda Refrigerator Service Manual 52 1200XX 120X IMXX Models 12V COM DC POWER FLP GND BLK e 1 GAS FLAPPER HTR SOL 5 FLP HEATER DOOR SWITCH A DOOR GREEN X X GREEN FANS 12V FAN PED 2 T STAT DC POWER 12V TEMP SENSOR F1 RED INT LIGHT 8 WHT BLK 43 RED WHIT 10 BERAV EAT
2. 27 by Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 1 Accessing the Diagnostic 45 Changing Screens aee rte 45 Exiting the Diagnostic Mode 45 Screens and Diagnostic LEDS Information Units with S N 832170 and 46 Diagnostic Mode Units S N 832171 and Higher 48 Diagnostic MOOG un event ee c ie tree 48 Accessing the Diagnostic 48 Changing Screens 48 Exiting the Diagnostic Mode 48 Screens and Diagnostic Segments Information 49 Wiring Pictorials and Diagrams 51 Ice Maker Components and Service 54 SPECIFICATIONS iie 54 Wire Harness L Uu uu bene b soporte donus 54 Water Fill Tube ec sua he a Esas 55 Water Fill k a slash coeant 55 12 Water Line 55 Water Valve 56 Water Valve Replacement 56 To install replacement solenoid water Valve 56 Ice Maker Troubleshooting Chart 57 Water Valve Service 57 Replacing Ice Maker
3. alternate flashing on the display Pleo while the controls search for AC LI L power ui 3 WhenAC power is not present the controls shift to AUTO LP mode AU FTT TWT and LP flash alternatively on the Li B display as the controls start a 30 Display seconds trial for ignition 4 Once the controls sense the flame they turn off the AU and LP and display the ON LED See NOTE 4 Shift from AUTO LP GAS to AUTO AC In AUTO mode the controls shift automatically from AUTO LP GAS to AUTO AC any time the controls sense that ac power is available No AC Power and No Flame When AC power is not present and a flame is not sensed at the end of the 30 seconds trial for ignition the controls 1 Shut off power to the solenoid gas valve 2 Set gas lock out See NOTE 5 3 Sound the alarm an intermittent beeping tone 4 Provide a visual warning by flashing alternating no AC and no FL no flame fault codes shown below Alternating Alternating 5 Record and store the no AC and no FL faults in diagnostics nonvolatile memory fault history AUTO LP mode remains in gas lock out until a full cooling cycle on AUTO AC is completed Gas lock out can also be cleared by turning the refrigerator OFF then back ON Troubleshooting No Flame and No AC Faults Use the following references to identify troubleshoot and correct an ignition failure and or no AC
4. 20 Flame Fails to Ignite or Flame Goes Out 42 Sidewall Exhaust Vent ie 20 AUTO AC Operation 43 LP Gas System 23 AUTO LP Operalion ettet titre te 43 Pressure Requirements 23 Modes of Operation S N 832171 and Higher 43 Components PP 24 AUTO PERPE APEE AT EA EETA TIIE IE IET E T A ANAE T 43 Testing for LP Gas Leaks doigts 24 Shift from AUTO LP GAS to AUTO 43 Solenoid Gas Valve sn 24 AC Power and No Flame 43 Solenoid Gas Valve 5 24 Troubleshooting No Flame and No AC Faults 43 Replacing Old Style Gas Valve 24 AC Manual Mode iii 44 0 o EET PE 25 AC Power or Loss of AC 44 BUET ISO UE 25 Power Restored 44 su tees 25 Troubleshooting no AC Fault ssss2111111srs5r11111nnsrrnnns 44 PM KP MERI 26 LP Manual Mode 44 Eu ERI 2 000 26 Flame Fails to Ignite or Flame Goes 44 Fue Batle diti eie eae snes 26 Diagnostic Mode S N 832170 and Lower 45 Flame Appearance 2 444 00244 404 00 104 26 Diagnostic 45 Burner Cleaning Procedure
5. Fault History Screen 6 provides to erase fault history from memory To erase fault history 1 Press and hold the button when shows TEMP SET on the screen 2 Release the button when shows on the screen 3 Wait five seconds 4 Press and hold the button until shows TEMP SET on the screen Press the button to bring up screen 7 MODE 50 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual Screen Power Board Inputs Screen 7 displays live power board inputs using lighted LED segments The illustration below provides live inputs information and assigned LED segments If a power board input is active or live its assigned input LED will be on Food comparment light Sensing burner flame is off and door is closed Thermistor sensing Screen fin temperature Number Press the button to bring screen 8 MODE Screen H Power Board Outputs Screen 8 displays live power board outputs using lighted LED segments The illustration below provides live outputs information and assigned LED segments If a power board output is active or live its assigned output LED will be on AC power to AC heater DC power to divider heater DC power to gas valve DC power to ignition circuit Screen Number DC power to light switch Press the button to brin
6. au s LIL dm um LED lights LED screen numbers Figure 42 Optical control assembly units with serial numbers 832170 and lower Diagnostic Mode The Diagnostic Mode uses ten diagnostic channels commonly known as screens to display live inputs outputs and fault history Each screen is numbered The screens for units with serial numbers 832170 and lower incorporates both the LED screen numbers and the LED lights See Figure 42 This optical control display uses a dual 7 segment LED module and lights to display the screen number and or diagnostic information Fault history live inputs and outputs are presented using LED segments and control lights Accessing the Diagnostic Mode To access the Diagnostic Mode 1 Press and hold both the and buttons at the same time 2 Release the and buttons as soon as displays Changing Screens To change screens press and hold the button until the next screen displays Exiting the Diagnostic Mode To exit the Diagnostic Mode 1 Press and hold and buttons at the same time 2 Release the and buttons when the controls leave the diagnostic mode Turning the refrigerator OFF then back ON also exits the Diagnostic Mode 46 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual Screens and Diagnostic LEDS Information Units with S N 832170 and Lower Screen 1 LED Segments Reliability Check Screen 1 con
7. wire Waker 1 Unclip thermal fuse mounting plate Do not overtighten screws 2 Push connector in Install the freezer shelf then install the ice bin 2 Press in locking tab with small flat blade screwdriver 3 While pressing locking tab pull back on wire harness to Plug both the ice maker and the refrigerator AC power unplug the connector from ice maker cords into the RV receptacle Thermal fuse spring clip Connector Locking tab Figure 56 Wire harness connection to ice maker Plug white AC power cord into AC outlet labeled Ice Maker Plug black AC power cord in outlet labeled Refrigerator Place refrigerator in service 60 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual Cycle Testing Ice Maker Cycle testing the ice maker verifies if the ice maker completes all cycle functions The cycle test is to be done with the ice maker dry To cycle the ice maker operation manually 1 Shuloffthe water supply to the ice maker water valve 2 Make sure 120 Vac is available to the ice maker 3 Remove ice maker cover 4 Make sure shutoff arm is in the down position on A CAUTION Remove jumper wire immediately after click sound Figure 57 Jumper wire or no later than 15 seconds after jumping terminals T and H Failure to remove jumper wire may damage the ice maker DISCONNECT POWER TO REMOVE MODULE 1891
8. l luu uuu uuu u u a 58 Cycle Testing Ice Maker 59 Checking Water Valve Operation 59 Water Fill Adjustment 222 60 Checking Water Valve Solenoid Resistance 60 Checking Mold Heater Resistance 61 Checking Voltage to Motor 61 Lad Ins Trra niente TREE 61 II 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual he About this Manual This service manual provides maintenance diagnostic and repair information for NORCOLD INC model 1200XX 120X IMXX gas absorption refrigerators It is a reference tool designed for technicians who are knowledgeable in the theory and operation of gas electric absorption refrigerators liquefied petroleum LP gas propane systems and AC DC electrical systems as installed in a variety of recreational vehicles RV All information illustrations and specifications contained in this publication are based on the latest product information available at the time of publication NORCOLD INC reserves the right to make changes at any time without notice Model Identification Model 1200XX 120X IMXX are 2 way refrigerators that can operate on AC power or LP gas The electronic controls operate on 12 Vdc Letter s appended to the model number i
9. Models www norcold com cda Refrigerator Service Manual AC HE Fault Code AC heater failed open Before beginning this procedure make sure m RV AC voltage to the refrigerator is 108 to 132 volts m No other appliance or lighting circuit is connected to the refrigerator AC circuit Fault indicator displayed COPIST Aa coia CEEE T ROOD J mer AUTO 4 AC wLPGAS S ES a FT TEMP MODE ON OFF AC LED blinking Check AC heater wires for loose or damaged connection Heater connections okay Repair or replace connectors If connectors cannot be replaced replace heater Check AC heater resistance Resistance See Figure 5 58 to 68 Q Replace AC heater Replace power board See page 40 58 to 68 Q each heater at room temperature Figure 5 Checking AC heater resistance P ane Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 15 dr Fault Code Door open for more than 2 minutes Before beginning this procedure make sure m Light thermistor connector and wire harness connector are fully engaged and locked Fault indicator displayed 12010 9COLDEST SET TEMP MODE ON OFF Check that the door latch striker plate is adjusted correctly Striker plate okay Check fresh food Door s compartment door s for vertical play properly Check operation of light door switches
10. No AC power available to refrigerator AC cord not plugged into power board See page 13 F3 fuse open pre pa SE Sex E HS AC LED Flashing 6 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual Code Probable Cause Reference ED ER z HS AC relay stuck closed See page 12 cold Ld coldest se page 14 Eu es wp ORE NOR ADI m 3E l AC voltage high l See page 14 heater failed open See page 15 coia cones EB Fresh food compartment door open more than asw ga I 2 minutes Lamp switches faulty See page 16 Temperature LED Flashing Ea ics ser M d 3 ue vs Selected Mode LED ON Backup operating system in operation See page 17 NORQOD Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 7 DISPLAYED FAULT CODES S N 832171 AND HIGHER Code Probable Cause Blank Refrigerator turned off Display No 12 Vdc to refrigerator Screen F1 fuse open Aiternating Le J The burner failed to ignite or reignite Display pudible CL Flame sense circuit failure Ars piternating aud qp 1 voltage low 4 L Display Alternating M DC voltage high Display IB No AC power
11. 16 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual Thermistor Failure Fault Controls in Backup Operating System mode Before beginning this procedure m Make sure lamp thermistor assembly is connected to the wire harness Fault indicator displayed Temp Setting Flashing Temp Setting Flashing SS coe cold Vass m L D AUTO 1 E SET TEMP MODE ONT OFF EE Check lamp thermistor wire assembly and connector for dirty broken connections Wires and connector good Clean repair terminals or connector as required See Figure 6 Check thermistor resistance See Figure 7 YES Temperature Resistance F kO pr dd 85 8 1 9 0 Lamp A 80 9 1 10 0 Connection 75 10 1 11 0 70 11 1 12 0 A 60 12 1 13 0 Thermistor 0 120 165 Connections 40 22 5 23 5 35 24 5 25 5 33 28 5 29 5 32 30 0 32 0 Approximate Values q Thermistor Thermistor packed in ice bath Figure 6 Thermistor terminals Figure 7 Checking thermistor resistance and connector Backup Operating System BOS When a warmer temperature is desired changing the The backup operating system BOS is an temperature setting to a lower number shortens the electronically controlled duty cycle It maintains the cooling cycle For example if the temperature setting refrigerator in operation if the thermistor is is set t
12. Bend of baffle flush with bottom a edge of vent door frame Aluminum or galvanized steel sheet full width baffle Enclosure width Fan 32 69 in 621156 Vent 13 75 high x 21 50 wide rough opening R O Center vent R O in enclosure width Minimum distance between bottom of the enclosure and the B top of the upper vent opening 62 in Enclosure Height 63 38 in Enclosure depths of more than Vent even or below enclosure floor 24 in and less than 26 in Figure 12 Baffle arrangement for enclosures depths of more than 24 inches and less than 26 inches 22 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual Distance between wall and rear of refrigerator 2 0 in or more Aluminum or galvanized steel sheet Distance between rear of refrigerator full width baffle condenser and box baffle 0 25 in ced lt 0 25 in Distance between bottom of refrigerator condenser and top of solid box baffle 0 25 in 621156 Vent Align horizontally with lower vent 1 Top edge of box baffle flush with bottom edge of vent door frame Aluminum wood or galvanized steel sheet f
13. 20 1200 120 Models www norcold com cda Refrigerator Service Manual Double Sidewall Venting The general guidelines for intake vents and roof exhaust vents presented in this section do not replace the instructions and or guidelines provided in the 1200 120X IMXX Installation Manual and the Ventilation Guidelines For Gas Electric Refrigerators part number 622090A 3 01 Refer to the 1200XX 120X IMXX Installation Manual and Ventilation Guidelines For Gas Electric Refrigerators for the latest information on approved vents installation instructions and special construction exceptions Because of increased installation of refrigerators in RV slide outs NORCOLD has developed venting guidelines for double sidewall vent applications This ensures NORCOLD refrigerators meet the ANSI Z21 19 standards for cooling performance when used in slide out applications The challenge with slide out installations is that the chimney effect see page 32 that is present with roof vent installations is not as strong in slide outs To improve the airflow of the chimney effect sidewall vent installations must have fans and baffles These fans and baffles direct the air flow through the surfaces of heat rejecting components NORCOLD has determined that the following three key design considerations optimize heat removal in slide out applications m Refrigerators installed in slide outs must have a fan or fans to assist air flow Al
14. Water valve solenoid faulty No AC power to ice maker lce maker OFF Mold overfilled Water valve washer seal damaged Not cycling ice in mold Water dripping from mold mold overflowing incorrectly Water valve washer seal damaged Mold heater failed open Not cycling AC power available Motor faulty Mold thermostat faulty Wire harness thermal fuse open Water Valve Service Models without Water Dispenser No water available to water valve Clogged water valve strainer Water fill adjustment screw set Check AC power supply Check water supply to valve Clean water valve strainer Test water valve See page 61 Check AC power supply Lower shutoff arm to ON position Check position of water valve orifice Reposition components Replace water valve Readjust water adjustment screw See page 62 Replace water valve See page 58 Check motor continuity See page 63 Check motor continuity See page 63 Replace ice maker See page 60 Check continuity of black wire harness wire The water valve inlet strainer should be checked annually for scale and sediment deposits The inlet connection internal components should only be checked when the mold overfills To access the the components housed the inlet fitting see Figure 54 1 Shut off the water supply to the ice maker W
15. and fan wiring from the cooling unit 2 Remove the drip cup retaining screw then remove the drip cup 3 Remove the burner box cover retaining screw then remove the cover 4 Disconnect the burner tube from the gas valve 5 Remove the burner retaining screw then remove the burner tube along with the burner 6 Disconnectthe gas valve wires from the power board 7 Remove the gas valve bracket screws 3 then remove the gas valve assembly 8 Remove the spark sense electrode assembly retaining screw then remove the spark sense electrode assembly from the burner box 9 Remove the burner box retaining screws 2 then remove the burner box 10 Disconnect the AC power cord from the power board 11 Remove the flapper heater wires 12 Remove the power board cover retaining screws 3 then remove the cover 13 Disconnect the AC heater wires from power board terminals AC HT LO1 and AC HT 14 Detach the thermistor from the 2 condenser fin 15 Cut both the lower and upper cable ties holding the wire harness to the foam plug 16 Remove the ice bin and freezer shelves 17 Remove the freezer plate retaining screws eight retaining screws and washers four in each freezer 18 Remove the seven retaining screws from the fin assembly 19 Cut the tape that seals the four edges of the foam plug 20 Remove the absorber bracket retaining screws 21 Remove the condenser retaining screw See Figure 35
16. or eliminate any of the refrigerator s electrical components electronic circuits or propane gas system components ADo not wet or spray liquids on or near electrical connections or electronic components Most liquids including leak detection solutions are electrically conductive and pose the potential for an electric shock hazard short electrical components damage electronic circuits and or ignite a fire ADo not use leak test solutions that contain ammonia or chlorine Ammonia and chlorine degrade copper and brass components A The cooling unit is a sealed system under pressure Do not try to repair or recharge the cooling unit Do not bend drop weld drill puncture saw or strike the cooling unit A Handle a leaking cooling unit with extreme caution The cooling unit contains ammonia hydrogen and sodium chromate Ammonia can cause severe skin and eye burns Hydrogen is highly flammable can ignite and burns with an intense flame Certain chromium compounds such as sodium chromate are carcinogenic Ado not use extension cords Do not remove the grounding prong from the refrigerator AC power cord Do not use a two prong adapter to connect the refrigerator to the AC outlet ADo not over fuse electrical circuits Use specified fuses and AWG wire sizes The Specifications section of this manual provides fuse size information Refer to the 1200 120 Installation Manual for the correct AWG wire size speci
17. procedures appear on page 26 RU X 4 Orifice en Figure 24 Flue and components Retaining wire s Baffle Figure 25 Flue baffle Light blue steady flame with sharp blue cones Figure 26 Flame appearance Refrigerator Service Manual ASS www norcold com cda 1200XX 120X IMXX Models 2 Burner Cleaning Procedure A WARNING Burn hazard Allow the burner box and burner components to cool before attempting to service the burner assembly or components 1 Turn OFF power to the refrigerator 2 Closethe LP gastank valve For steps 3 5 refer to Figure 34 page 36 3 Close the combination gas control valve manual shut off 4 Remove the drip cup A CAUTION To prevent damage to connections piping and components always use two wrenches to loosen the burner tube A damaged burner tube creates a potential for gas leaks 5 Remove the burner box cover For steps 6 8 refer to Figures 14 and 15 page 24 6 Disconnectthe burner tube from the orifice assembly 7 Remove the orifice assembly from the burner 8 Remove the burner retaining screw 9 Remove the burner from the burner box frame 10 Clean the burner Clean the burner slots free of carbon The inner bore of the burner body may be cleaned with a 3 16 in double spiral wire brush Do not damage the threads when cleaning the i
18. Leakage 2 440 32 dc LO Fault Code Low dc 10 Disposal of Cooling Unit 32 Sr FS Sr Fault Code Flame sense circuit failure 10 Cooling System Diagnostic Flowchart 33 dc HI Fault Code DC voltage high 11 Removing the Refrigerator and Cooling Unit 35 Sr CL AC rE Fault Code AC relay stuck closed 11 Replacing the Cooling Unit MUN UII E IS 35 no AC Fault Code No AC power available 12 Removing Cooling Unit 36 AC LO Fault Code AC voltage low 13 Installation of Replacement Cooling Unit 36 AC HI Fault Code AC voltage high 13 Reinstallation of Refrigerator into Enclosure 38 AC HE Fault Code AC heater failed open 14 Electronic Components 39 Food Compartment Lamp Switch 15 Power Board 39 Lamp Switch Operation M 15 Removal Power 39 dr Fault Code Door open for than 2 minutes 15 Installation Power 39 Lamp Switch Testing Procedure 15 Thermi
19. ON OFF DISPLAY 2 WHT RED 11 arc 5 BOARD VOLTAGE BLK 4 4 T REGULAT Ad BLK DIVIDER HEATER 42 5 ORG 3 11 MIO 4 LED BLU 9 DRIVER POWER BOARD 4 YEL 5 BEEPER 9 9 CRN 10 TEMP H BLU 2 WHT 6 E 7 SWITCH KA d RED WHT 8 46 WHT VIO 8 AC HTR RED HTR RED BLK YEL lt N AC HTR RED ACHTR2 RED pik MODE L2 N L1 ABSORPTION UNIT PART 618806B Figure 48 1200XX 120X IMXX wiring diagram SN 832170 and below Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 53 WIRING PICTORIALS AND DIAGRAMS SN 832171 AND ABOVE ay ACHTLO ACHTLO2 c CHT N FLP DC HEAT DCHTGND Dispenser board Movable door seal heater Q Display overlay 2 Display board 3 Divider heater 4 Thermistor light assembly Fans Dispenser microswitch Temperature switch Dispenser valve Gas valve Water valve heater 5 Ignitor Door switches Dispenser water line heater 6 Power board AC heaters Ice maker water line heater Door contacts Temperature switch 12 Vac power cord 5 amp fuse 120 Vac 5 amp fuse 12 Vdc 9 G Ice maker water line heater 26 Dispenser light Temperature switch GG OOOO O
20. ORC Blank CE sr 9 we E 2 LP GAS 4COLD 9COLDEST SET TEMP MODE ON OFF Mode LED off Measure voltage across power board 12VDC and GND1 connections 10 5 NO to No power input from o unit 1 No DC input fi RVt it 15 4 Vdc 2 Faulty wiring or connectors YES Check condition of F1 fuse NO Replace fuse Refer to in power board See Figure 3 Specifications on page 4 YES Measure voltage at optical control harness See Voltage present Figure 4 NO Replace power board See page 40 YES Replace optical control assembly See page 41 10 5 to 15 4 Vdc Figure 3 Checking the DC fuse continuity Figure 4 Measurement points for wire harness voltage t Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 9 no LP no FL Fault Code Burner failed to ignite or reignite Before beginning this procedure make sure m RV LP gas tank valve is open m Refrigerator solenoid gas valve manual shut off is open m LP gas pressure at the solenoid gas valve pressure tap is 10 5 to 11 5 in w c Fault indicator displayed Flashing no coa CEE coldest 4 1 COLD 9COLDEST SE TEMP MODE ON OFF LJ AUTO AC LPGAS Ed oe Blinking LP GAS LED Clean and service burner See page 28 Air gap 1 8 to 3 16 inch Check that electrode to burner air gap is correct NO Set electrode
21. Operation S N 832170 and Lower AUTO InAUTO mode AC poweris the first heat energy source selected by the controls If AC power is not present the controls shift to LP gas propane the second priority heat energy source AUTO AC Operation When the AUTO mode is selected the controls 1 Light AC and AUTO lights while the Mixes controls search for AC power h TT TOUS 2 Turn off AC light when AC power is xs m detected The AU light remains lit 47 See NOTE 1 l In AUTO mode pressing the MODE pushbutton momentarily displays the heat energy source in use AUTO LP Operation The controls shift to AUTO LP mode any time AC power is not available The controls shift to AUTO LP as follows 1 ACandAUTO lights are lit while the Er controls search for AC power LT Ky EN 2 When AC power is not present the 1 41 controls shift to AUTO LP mode Bh Yu AUTO and LP lights arelitasthe N S controls start a 30 seconds trial for ignition 3 Once the controls sense the flame the 1 LP light is turn off only the AUTO vm light remains on See NOTE 1 PT Shift from AUTO LP GAS to AUTO AC In AUTO mode the controls shift automatically from AUTO LP GAS to AUTO AC any time the controls sense that AC power is available No AC Power and No Flame When AC power is not present and a flame is not sensed at the end of the 30 seconds trial for ignition the controls 1 Shut off power to the sol
22. Parts Use only authorized NORCOLD INC replacement parts Generic parts do not meet NORCOLD INC specifications for safety reliability and performance The use of unauthorized aftermarket or generic replacement parts voids the refrigerator s limited warranty coverage Technical Assistance If unable to resolve technical issues using the information provided in this manual technical support for service technicians is available through the NORCOLD INC Customer Service Center BR 1 800 444 7210 S 1 937 497 3183 World Wide Web www norcold com cda The following information is required to process technical support requests Model number Serial number Make model and year of recreational vehicle 79 64 Me Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 1 TESTED FOR LP EQUIPPED FOR PROPANE Tesi NORCOLD INC co equppeq porie propan SIDNEY OHIO ens TWG pue 10 5 WC SERIAL de serie REFRIGERANT frigorigene 120 XXXXXXX z 3 8Amps 456 Watts 5 2 541 5 ii MODEL de modele 12VDC 1200LRIM Hi 1 90 Amps 23 Watts D ESSAI 800 PSI GROUP CODE code de INPUT puissance 2200 BTUH For recreational vehicle installation Min Installation clearance 0 sides top bottom back Install only with Kit 3 See installation
23. Thermistor failure Lighted LEDs on this screen indicate a previous failure Press the button to bring up screen 6 Screen 6 Stored Fault History Screen 6 displays stored fault history using LED lights If a fault occurred its assigned fault history LED will be on AC power not available Door ajar for 2 minutes Lighted LEDs on this screen indicate a previous failure Press the button to bring up screen 7 www norcold com cda 1200XX 120X IMXX Models 47 Screen 7 Fin Temperature Screen 7 displays the actual fin temperature being sensed by the thermistor This is not the fresh food cabinet air temperature The illustration shows 32 F fin temperature as displayed in screen 7 More thermistor information can be found on page 29 Cooling fin temperature coia SES 92 AUTO LPGAS E Press the button to bring up screen 8 Screen 8 AC Input Voltage Screen 8 displays AC input voltage measured by the controls Vac greater than or equal to 100 NORCOLD AUTO LPGAS Bo Indicates AC voltage measurment Shown 100 20 120 Vac Press the button to bring up screen 9 Screen 9 AC Heater Current Screen 9 the AC heater current measured by the controls AC heater 2 amp draw A cone NORCOLD SA Oo LP AUTO GAS Co Indicates AC current measurment Shown 4 8 amps Press the button to bring up s
24. Water dispenser models only Ice maker models only Gas models only Figure 49 1200XX 120X IMXX pictorial SN 832171 and above 54 1200 120 Models www norcold com cda Refrigerator Service Manual gt 12 VDCIVCD gt DC HT GND gt i BKINR gt FLPIDG HEAT gt gags Z KA i BK NR RDIRG 1 7 B amp NR Pao RS s sS eere sss 12 ka WHIBC 8 gt WH BKIBC NR WHIBC 13 gt ROWARGSC 2 S WHC Ne PY 10 7 BICWHINR BC 3 Swe WH RD BC RG gt BRINR BUIBL gt AC HT HI2 gt 3 aem 2 T gt ACHTLO2 gt AC HT LO gt gt 12 gt LE 3 282 awe gt 16 gt WH VT BC VT WH RD BC RG WHIBC _ BU BL GNNE VINT gt gt lt lt o ORIOR WH VTIBC VT gt gt YUUN WHIBC u lt lt lt lt P 12 lt I 12 lt 1 lt lt 9 lt lt 9 lt 2 1 1 40 lt 10 3 4 5 6 lt 5 lt lt 5 lt ese E 8 lt lt 8 lt 3 Power board Gas valve 12 Temperature switch 3 ON OFF switch Voltage regulator 17 TEMP SET button Water dispenser models only Ice maker models only Gas models only Interior light Divider heater MODE button Overlay 2 99969 0000 Temperature switch Display board 120 Vac connection AC heaters Do
25. connected to the unfiltered side the AC ripple generated by the converter may cause a dc HI fault code to display To troubleshoot a dc HI fault connect a charged 12 volt automotive battery to the power board If the dc HI code clears the fault was caused by unfiltered DC power If the dc HI code does not clear replace the power board see page 40 Sr CL AC rE Fault Code AC relay stuck closed Fault indicator displayed Sr and CL Flashing ga SE DAN SN Bu E TES 12 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual no AC Fault Code No AC power available Before beginning this procedure make sure m No other problems exist with the RV AC power supply m No other appliances or lighting circuits are connected to the refrigerator AC circuit m Extension cords are not being used to supply AC power to the refrigerator Fault indicator displayed o Flashing T 506 1 COLD 3 COLDEST SET EMP MODE u E US LP c2 Alarm x u AC and no Flashing gt AC LED Flashing Measure voltage at power board AC cord connection 108 to 132 Vac 1 Check AC power input from RV to unit 2 Check AC power cord Check condition of F3 fuse in power board Replace fuse See Specifications page 4 Check that fuse holder clips are making full contact with fuse Adjust clips to ensure fuse contacts are firm in clips
26. faults W Page 10 no FL no LP fault code troubleshooting flowchart Page 13 no AC fault code troubleshooting flowchart m Page 47 Diagnostic Mode Screen 3 or page 50 Diagnostic Mode Screen 4 44 1200xx 120X IMXX Models www norcold com cda Refrigerator Service Manual AC Manual Mode In the AC Manual mode AC power is the only heat energy source selected by the controls When AC Manual Mode is selected 1 mode indicator AC displays as the controls start the search for AC power 2 WhenAC power is detected the AC indicator turns off The ON LED displays See NOTE 6 NOTE 6 Pressing the MODE pushbutton displays the AC mode indicator No AC Power or Loss of AC Power If the controls do not sense the presence of AC power or when AC power is lost in AC Manual mode the controls 1 Display the no AC fault code Alternating HL Display 2 Sound the audible alarm The alarm is intermittent beeping tone Pressing the MODE pushbutton silences the alarm 3 Record and store the no AC fault in diagnostics nonvolatile memory fault history AC Power Restored When AC power is restored the controls 1 Automatically restore AC Manual Mode operation however the recorded fault history will not be erased from memory 2 Silence the alarm and clear then no AC fault code from the display Troubleshooting no AC Fault Use the f
27. fill tube line and heater Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 57 Water Valve Without Water Dispenser The ice maker water valve see Figure 53 is solenoid operated This valve is located on the back of the cabinet on the bottom of the refrigerator The solenoid is supplied 120 Vac through the ice maker wire harness Spring pressure maintains the valve shut when the solenoid is not energized Water Valve Replacement Procedure 1 Turn the refrigerator OFF 2 Unplug both the ice maker AC power cord and the refrigerator AC power cord from the RV receptacle 3 Shut off the water supply to the ice maker 4 Disconnect the wires from the water valve solenoid terminals 5 Disconnect the white heater wire from the thermostat wire white from brown 6 Disconnect remaining white heater wire from wire harness lead white from redl 7 Disconnect the brown thermostat wire from wire harness brown from red 8 Disconnect the water supply line from valve s inlet fitting Disconnect the ice maker water line 10 Remove the thermostat clips 2 and thermostat Retain thermostat and clips 11 Unwrap the heater wire from water valve 12 Remove the water valve retaining screws then remove the water valve bracket assembly Retain screws and spacers Wire harness brown Thermostat AM Red To install replacement solenoid water valve 1 Install the replacement
28. minutes for a period of two hours 4 fthere is no decrease in temperature in this two hour time period the Control turns off the active refrigeration heat source 5 After ten minutes the Control restarts the heat source and monitors the fin temperature every ten minutes for another 40 minutes 6 Within this 40 minute time period the temperature must decrease or the Control will turn off the refrigerator and lock out the heat sources 7 Once the heat sources have been locked out the optical control assembly displays the no co fault code and an audible alarm sounds First no co Fault Code The first time the no co fault code appears on the optical control assembly it can be cleared by the user by turning the refrigerator OFF and then back ON This gives the user the opportunity to check for problems that may have caused a no co code such as obstructed ventilation This fault code occurrence is then stored in the controls If the refrigerator completes a full cooling cycle after the user turns it back on this fault code occurrence will be cleared from the controls No co fault code occurrences are not stored in the built in diagnostic stored fault history accessible through the Diagnostic Mode Instead they are stored in a separate unaccessible stored fault history If the refrigerator does not complete a full cooling cycle after the user turns the refrigerator back on a power board reset is required The po
29. should be checked annually In roof exhaust venting applications the refrigerator must be removed from the enclosure to check or service the flue or any of its components In most sidewall exhaust venting applications removal of the sidewall exhaust vent provides clear access to service the flue or any of its components Flue Cap The flue cap see Figure 24 deflects hot exhaust gases to the sides It also keeps dirt and debris from getting into the flue Cooling performance may be affected if the flue cap is not installed or is not installed correctly Flue Baffle The flue baffle see Figure 25 traps and transfers heat to the cooling unit generator A retaining wire suspends the flue baffle in the flue just above the flame See Figure 24 The flue baffle should be checked annually In roof vented installations itis necessary to remove the refrigerator from the enclosure to check the flue baffle To remove the flue baffle from the flue 1 Remove the flue cap 2 Unclip the baffle retaining wire from the rim of the flue 3 Pullthe baffle out of the flue tube A CAUTION Do not cut or modify the flue baffle retaining wire The wire positions the baffle for optimal heat transfer Flame Appearance The flame should be light blue with sharp blue root cones and a steady burning flame plume See Figure 26 A flame that is mostly orange or yellow is erratic and or unstable indicates a dirty burner Burner cleaning
30. to burner air gap 1 8 to 3 16 inch YES Check spark sense electrode Replace spark sense electrode assembly for continuity assembly YES Check gas valve solenoid 79 to 85 Q NO resistance YES Check gas valve solenoid wires for continuity Replace gas valve Replace gas valve wires Check voltage across power board terminals GV and GV GND Replace power board See page 40 Voltage present Faulty gas valve Replace gas valve 10 1200 120 Models www norcold com cda Refrigerator Service Manual P Sr FS Sr Fault Code Flame sense circuit failure Fault indicator displayed I ORE AD eb ear eS AUTO IPGAS ay 1 COLD 9COLDEST SET TEMP MODE ON OFF 6 EE fs dc LO Fault Code Low dc voltage Before beginning this procedure m Make sure RV DC voltage to refrigerator is 10 5 to 15 4 volts m Determine if the dc LO fault code displays when the converter is the source of DC power m Make sure no other appliance or lighting circuit is connected to the refrigerator DC circuit Fault indicator displayed ri OFF SET DAN AUTO Lr ac peas E dc and LO Flashing EA p on e 14010 9COLDEST SET MP ON OFF Check for DC voltage input to power board terminals 12VDC and GND1 Voltage lower than 10 5 Vdc Check RV 12 Vdc power supply to refrigerator See NOTE below to de
31. water valve bracket assembly on the refrigerator Use screws and spacers previously removed 2 Clip the thermostat to water valve bracket Use clips previously removed 3 Carefully wrap one white heater wire around the valve as shown in Figure 53 Do not exceed two wraps at each point 4 Tape wire wraps to keep the wire turns in position and to keep wire turns from overlapping Do not allow wires to overlap 5 Connectthe wrapped white heater wire to a thermostat wire brown 6 Connectthe remaining white heater wire to the black wire connected to the refrigerator wire harness 7 Connectthe remaining thermostat brown wire to the red wire connected to the refrigerator wire harness 8 Connectice maker water line then tighten fitting firmly Do not overtighten 9 Connect RV water supply to water valve then tighten fitting firmly Do not overtighten 10 Connect solenoid wires Brown wire to terminal M and wire from 120 Vac power cord to terminal B4 11 Open water supply to ice maker 12 Plug in both ice maker AC power cord and the refrigerator AC power cord 13 Place refrigerator in service From AC power cord To ice maker Figure 53 Solenoid water valve models without water dispenser 58 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual Ice Maker Troubleshooting Chart Problem Probable Causes Remedy No AC power to ice maker No ice in mold no ice yield
32. 151 600 1M 106 626649 011303 wW2 5 Jump terminals Use a 14 AWG jumper wire with 1 2 inch insulation stripped from ends Jumper wire is shown in Figure 57 The jumping of T and H is shown in Figure 58 6 The ejector should begin to rotate clockwise starting at the 2 o clock stop position 7 Remove jumper wire from terminals T and H when a click sound is heard and no later than 15 seconds after jumping the terminals 8 Observe ice maker operation as ejector rotates 9 After the ice cubes break loose from the mold the ice maker should cycle without stopping If the ice maker stops or makes loud noises replace ice maker See section Replacing Ice Maker page 60 Checking Water Valve Operation To check water valve operation TSCONNECT PONER TO REMOVE MODULE 188 11 60 MS 406 626649 01 13 03 w2 1 Remove the ice maker cover 2 Jump test point V and L See Figure 59 Use a 14 AWG jumper wire with 1 2 inch insulation stripped from each end as shown in Figure 57 The solenoid should click and buzz if it is operating properly If the solenoid does not click and buzz replace the water valve see page 58 Figure 59 Checking water valve operation D j 61 Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models Water Fill Adjustment The water fill adjustment screw is set at the factory Often times the production of thin ice cubes or the ice m
33. 360Q water valve solenoid operating properly OL check for loose wire harness connections at water valve or an open solenoid coil 00 0Q check resistance at solenoid terminals and wire harness continuity Normal setting Contact opening centered within hole DISCONNECT POWER TO REMOVE MODULE 1851 1151 60 106 626649 MNI W2 Contact alignment opening Figure 60 Water fill adjustment screw TISCONNECT PONER TQ REMOVE MODULE 185 1154 60 HL Figure 61 Checking solenoid resistance 62 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual Checking Mold Heater Resistance To check the mold heater resistance DISCONNECT PONER TO REMOVE NODULE 1850 115 601 TM S 106 626649 011303 2 1 Unplug the ice maker AC power cord 2 Remove maker cover 3 Setmultimeter to Ohm scale then connect probes to test points L and H Test probe tips must be 1 2 inch long to make full contact with internal terminals See Figure 62 B 71 to 79 O mold heater is operating properly E Below 71 Q or above 79 Q replace ice maker OL open heater replace ice maker Checking Voltage to Motor To check voltage supply to motor 1 Make sure 120 Vac is available to the ice maker 2 Remove ice maker cover 3 Setmultimeter to AC scale then connect probes to test point N and M See Figure 63 Test probe tips must be 1 2 inch lon
34. NORCOLD Service Manual EL D A Gas Electric Refrigerators MODELS A WARNING DO NOT install this refrigerator in below deck marine applications Do not install this refrigerator in fixed indoor cabin or other dwelling applications This refrigerator must use only NORCOLD designed and approved outside air in take and exhaust ventilation for correct and safe operation Any other ventila tion could cause lethal combustion exhaust fumes and or explosive propane gas fumes to be in the living area and or below deck 2005 THETFORD CORP NORCOLD INC All rights reserved Publication No 618968B 02 18 05 TABLE OF CONTENTS Introduction 1 Electrical Requirements and Components 28 About this 1 DC Voltage Requirements and Polarity 28 Model Identification a u ene nies 1 Power Board DG F e eet 28 Information Label ici n rte 1 DC Power Wiring Requirements 28 Cooling Unit Serial Number 1 AC DC Converter as Power Source 28 Certification and Code Requirement 1 Lamp Assembly 28 About InstallatiOn 1 Divider Heat yz sa cei ri eere e in 28 Replacement Parts tette a 1 AC Power Requirements 8 29
35. Off level operation Dirty burner Low AC voltage Cooling fan inoperative if present Improper installation No co fault code Faulty spark sense electrode assembly Checks Reference See page 9 Check 12 Vdc connections Check F1 fuse See page 13 Check F3 fuse Check heaters resistances Check enclosure for air flow obstructions Check AC voltage input Check LP gas supply and valves Set electrode to 1 8 to 3 16 in Replace spark sense electrode Replace power board See page 40 Check enclosure for obstructed air flow Set gas pressure to 10 5 to 11 5 in w c Clean burner See page 28 Replace flue baffle See page 27 Clear flue cap See page 27 Check enclosure for obstructed air flow Level unit See page 32 Clean burner See page 28 Check AC voltage input Test fan operation Check installation See pages 19 23 and 1200 Installation Manual LBAN Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 5 DISPLAYED FAULT CODES S N832170 AND LOWER Code Probable Cause Reference LEDs off Coide Blank pa creen Refrigerator turned off No 12 Vdc to refrigerator See page 9 F1 fuse open Les GAS Mode LEDs off The burner failed to ignite or reignite See page 10 Flame sense circuit failure See page 11 DC voltage low See page 11 DC voltage high See page 12 no Flashing
36. P gas system B Do not smoke or light fires Extinguish all open flames B Do not use an open flame to leak test any of the LP gas system components LP gas is highly flammable and explosive B Do not connect the refrigerator directly to the LP gas tank Always use an approved pressure regulator between the LP gas tank and the refrigerator LP gas system B To prevent damage to connections piping and components always use two wrenches to tighten or loosen connections Damaged connections piping and components create the potential for gas leaks The refrigerator LP gas system shown in Figures 14 and 15 is for propane gas use only The system working pressure is 10 5 to 11 5 in water column Propane gas pressures below 10 5 in w c or above 11 5 in w c will affect heat output which will directly affect cooling efficiency Propane gas flow control is monitored electronically by the control s flame sensing circuit If the flame sensing circuit does not detect a burner flame within 30 seconds after initiating ignition power to the gas valve is turned off and gas mode operation is locked out 24 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual Testing for LP Gas Leaks A WARNING Do not wet or spray liquids on or near electrical connections or electronic components Many liquids including leak detection solutions are electrically conductive and can create an electric shock hazard sh
37. Technical Assistance oriit sorpena 1 AC 29 AC Heater Circuit Fuse 29 pua C A s ae Power Board AC Power Cord 29 Attention Statements SOD OOO S Gs yee 3 Ice Maker AC Power Cord 30 md MMC M IM NM EE 12 Ventilation Fans 80 Safety Statements trente Sala a i 3 Specifications 4 dun x 120X IMAX M RE See nn nee 4 Heat Absorption 31 Troubleshooting Quick Reference Guide 5 Leveled Operation 31 Gradual Decrease in Cooling Efficiency 31 Displayed Fault Codesr 6 Cooling Performance Monitoring Control 31 Troubleshooting Flowcharts 8 Units with Serial Numbers 832171 and Higher Only 31 Blank Display Refrigerator does not turn on 8 Cooling Unit Monitoring Control Operation 32 no LP no FL Fault Code Burner failed to ignite or First no co Fault Code le D Eine MEER Es na EE 32 9g Refrigerant
38. aker not cycling correctly is related to an unauthorized field adjustment to the water fill adjustment screw Proceed as follows to adjust the water fill adjustment screw 1 Remove the two screws holding the ice maker to the mounting plate See Figure 55 page 60 2 Remove the mounting plate from the freezer plate 3 Remove two screws from the ice maker upper mounting brackets 4 Position the ice maker with the cover facing out Do not pull on wire harness 5 Locate the screw and contact alignment opening shown in Figure 60 6 Determine the position of the hole in the internal contact plate Do not adjust the water fill adjustment screw if the hole is centered within the housing hole See Figure 60 A CAUTION Do not turn the water fill adjustment screw over one turn Turning the screw over one turn may damage the contacts A 1 4 turn clockwise or counterclockwise will vary the fill by 0 34fl oz 10 mL 7 To readjust the water fill level turn the adjustment screw clockwise or counterclockwise as required until the contact hole is centered in the module hole See Figure 60 Checking Water Valve Solenoid Resistance To check water valve solenoid resistance 1 Disconnect AC power to the ice maker 2 Removethe ice maker cover 3 Setmultimeter to Ohm scale then connect probes to test points V and N See Figure 61 The test probe tips must be 1 2 inch long to make full contact with internal terminals W 295 to
39. and making full contact Replace power board See page 40 ws qJ Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 13 AC LO Fault Code AC voltage low Before beginning this procedure m Determine if a certain AC power source sets the AC LO fault code generator shore power inverter m Make sure no other appliance or lighting circuit is connected to the refrigerator AC circuit m Make sure extension cords are not being used to supply AC power to the refrigerator Fault indicator displayed LO Flashing Gn ea pudible upa E 2 AC LED blinking Measure voltage at power board AC cord connection Voltage Fault related to RV AC power distribution lower than component or circuit supplying AC power 108 Vac to refrigerator Replace power board See page 40 AC HI Fault Code AC voltage high Before beginning this procedure m Determine if a certain AC power source sets the AC Hl fault code generator shore power inverter Fault indicator displayed HI Flashing cold PRE coidest SA 1 COLD S COLDEST SET TEMP MODE ON OFF E c AC LED Flashing Measure voltage at power board AC cord connection Voltage Fault related to RV AC power distribution higher than component or circuit supplying AC power 132 Vac to refrigerator Replace power board See page 40 14 1200 120
40. asher seal Orifice 2 Disconnect the inlet fitting adapter from the water valve inlet T Orifice Seat 3 Check strainer position If the strainer is seated approximately 1 8 inch in the fitting the orifice seat orifice diffuser plate and strainer are in their correct position A creased strainer end usually indicates that the diffuser plate orifice and orifice seat are not in their correct position These components should be repositioned as shown in Figure 54 To reposition components correctly a Press the orifice seat fully against the valve support then seat the orifice firmly into the orifice seat Seat the diffuser plate firmly against the orifice c Seat the strainer firmly against the orifice plate d Reconnectthe inlet fitting adapter to the water valve Diffuser Plate Figure 54 Solenoid water valve components Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 59 Replacing Ice Maker Cover a Removal of existing ice maker 8 9 10 Upper bracket 2 q 1 Cut down left side 2 Fold tab DE back SW 3 Cut down right side Be sure to save all screws and other components removed from the existing ice maker in this procedure as these screws and components will be used when installing the replacement ice maker Turn refrigerator OFF Unplug both the ice maker AC po
41. available to refrigerator HL 3 gt AC cord not plugged into power board Ci 7i 424 fuse open JIA a Alternating Au ae 1 ma AC relay stuck closed E JU Alternatina Nc 2 voltage low D Display Alternating suite H HE U T AC voltage high a SITE e 28 1 94 heater failed open i e a Display fs food compartment door open more than 2 minutes dre Lamp switches faulty Flashing Jre Backup operating system in operation etting al No cooling detected by the controls Disp Pd Reference See page 9 See page 10 See page 11 See page 11 See page 12 See page 13 See page 12 See page 14 See page 14 See page 15 16 See page 17 18 32 35 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual TROUBLESHOOTING FLOWCHARTS Blank Display Refrigerator does not turn on Before beginning this procedure make sure m The RV DC power system is supplying 10 5 to 15 4 volts to the refrigerator m No other RV appliances or lighting circuits are connected to the refrigerator DC circuit m 12 Vdc input to the power board is wired according to the 1200XX 120X IMXX Installation Manual Fault indicator displayed All LEDs off A coi NORCOLD u Blank
42. ces the alarm 4 Display a flashing visual warning no LP shown below Xy nf AUTO mode remains gas lock out until a full cooling cycle on AUTO AC is completed Gas lock out can also be cleared by turning the refrigerator OFF then back ON or by selecting the AUTO mode Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 43 Modes of Operation S N 832171 and Higher AUTO In AUTO mode AC power is the first heat energy source selected by the controls If AC power is not present the controls shift to LP gas propane the second priority heat energy source AUTO AC Operation When the AUTO mode is selected the controls 1 Display AUTO AU mode operation AL indicator Alternating 2 Flash AU and AC as the search for power begins Ll FL Display EN 3 Turn off AU and AC when ac power is detected and display the ON LED See NOTE 4 In AUTO mode pressing the MODE pushbutton momentarily displays the heat energy source in use For example in AUTO AC the display flashes AU AC alternatively for approximately 10 seconds AUTO LP Operation The controls shift to AUTO LP mode any time ac power is not available The controls shiftto AUTO LP as follows Alternating 1 TheAUTO mode operation indicator AU displays 2 AU and AC indicator
43. codes and diagnostic information Press and hold to select AUTO AC or LP Manual Shows temperature setting Mode y Release when desired mode displays Figure 41 Optical control assembly serial numbers 832171 and higher Optical Control Assembly The optical control assembly located on the front of the refrigerator communicates with the power board through a foamed in wire harness this wire harness is not connected to the ice maker wire harness Drilling or puncturing the refrigerator rear panels may cause damage to the wire harness Controls and related features are shown in Figures 40 and 41 Units with serial numbers 832170 and lower have controls shown in Figure 40 and units with serial numbers 832170 and higher have the controls shown in Figure 41 Two screws hold the optical control assembly into place Replacing Optical Control Assembly 1 Turn the refrigerator OFF 2 Remove the two control retaining screws then remove the optical control assembly 3 Disconnect the optical control assembly from the wire harness 4 Connectthe replacement optical control assembly to the wire harness 5 Install the optical control assembly on the divider then install the control retaining screws Do not overtighten the retaining screws 6 Turnon the refrigerator then check all of the optical control assembly functions Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 41 Modes of
44. controls 1 Display the no AC fault code 914 nni 2 Sound the audible alarm The alarm is intermittent beeping tone Pressing the MODE pushbutton silences the alarm 3 Record and store the no AC fault in diagnostics nonvolatile memory fault history AC Power Restored When AC power is restored the controls 1 Automatically restore AC Manual Mode operation however the recorded fault history will not be erased from memory 2 Silence the alarm and clear then no AC fault code from the display Troubleshooting no AC Fault Use the following references to identify troubleshoot and correct a no AC fault m Page 13 no AC fault codes troubleshooting flowchart m Page 47 Diagnostic Mode Screen 6 or pages 50 51 Diagnostic Mode Screens 5 and 8 LP Manual Mode In the LP Manual Mode LP gas is the only heat energy source selected by the controls When the controls shift to LP Manual mode 1 The LP light flashes and the controls Od start a 30 second trial for ignition 2 When the controls sense a flame wo x the LP light remains on W Flame Fails to Ignite or Flame Goes Out If the controls do not sense a flame within the 30 second trial for ignition or the flame goes out the controls 1 Shut off power to the solenoid gas valve 2 Set gas lock out See NOTE 3 below 3 Sound audible alarm The alarm is intermittent beeping tone Pressing the MODE pushbutton silen
45. creen 0 Screen 0 DC Input Voltage Screen 0 displays the DC voltage measured by the controls DC voltage over 10 volts Vdc greater than or equal to 10 Shown 10 2 0 12 0 Vdc Press the button to return to screen 1 48 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual DIAGNOSTIC MODE UNITS S N 832171 AND ABOVE a 1 COLD 9 COLDEST 00 0C TEMP MODE OFF Figure 43 Optical control assembly units with serial numbers 832171 and higher Diagnostic Mode The Diagnostic Mode uses ten diagnostic channels commonly known as screens to display live inputs outputs and fault history Each screen is numbered The screen number is always displayed on the left side of the optical control assembly display See Figures 43 and 44 This optical control display uses a dual 7 segment LED module to display the screen number and diagnostic information Information displayed is made up of four letters or digits that flash in an alternating sequence Fault history live inputs and outputs are presented using LED segments The diagnostic LED segments if present display to the right of the screen number For diagnostic LED segments identification numbers see Figure 44 Screen Number gum Ss esas on tight Figure 44 Diagnostic LEDs segments identification Accessing the Diagnostic Mode To access the Diagnostic Mode 1 Press and hold both t
46. dentify factory installed accessories For example a 1200 IMSS is a 2 way refrigerator equipped with an ice maker and stainless steel doors Information Label The information label is located in the upper right corner of the fresh food compartment just below the divider See Figure 1 page 2 The label provides the following information W Serial number Model number LP gas propane pressure Btu hr AC voltage and amperage DC voltage and amperage Design certification Vent kit requirement Cooling Unit Serial Number The cooling unit has a separate serial number that appears on the cooling unit bar code label The label is affixed to the surface of the cooling unit leveling chamber See Figure 2 page 2 INTRODUCTION Certification and Code Requirements NORCOLD INC 1200XX 120X IMXX gas electric absorption refrigerators are certified under the latest edition of ANSI Z21 19B standards for installation in mobile homes or recreational vehicles NORCOLD INC 91200XX 120X IMXX gas electric absorption refrigerators are also certified with the Canadian Standards Association CAN CGA 1 4 M94 Electrical components are compliant About Installation Refrigerator installation must conform with the 1200XX 120X IMXX Installation Manual for the NORCOLD INC limited warranty to be in effect Installation must also comply with applicable local codes and standards set by the applicable certification agency Replacement
47. e DC amp draws at nominal 12 Vdc Automatic ignition Moisture reduction heater and divider heater Fresh food compartment lamp Gas valve Fans 2 AC power AC heater operating voltage requirements 108 to 132 Vac Fuse AC heater circuit F3 in power board 5A 1 4in x 1 1 4 in AGC type fast acting AC heater rating 225 W 120 Vac resistance of 64 Q LP gas propane Operating pressure 10 5 to 11 5 in w c Heat input 2200 Btu h 11 in w c Orifice old style 0 190 jeweled Orifice new style Gas ignition Automatic with flame sensing circuit Electrode tip to burner air gap 1 8 to 3 16 in 4 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual TROUBLESHOOTING QUICK REFERENCE GUIDE Problem Possible Cause The refrigerator does not turn ON The refrigerator does not cool on AC power The refrigerator does not cool efficiently on AC power The refrigerator does not operate on LP gas No 12 Vdc power to refrigerator Faulty loose 12 Vdc connections F1 fuse in power board open F3 fuse in power board open No AC power to refrigerator AC heater failed open Ventilation obstructed AC voltage low No LP gas Incorrect electrode to burner gap Flame sensing circuit failure Ventilation obstructed Incorrect LP gas pressure Dirty burner Missing flue baffle Flue cap blocked The refrigerator does not cool efficiently on LP gas Poor ventilation
48. e divider separating the freezer and fresh food compartment The controls constantly monitor power board voltage output to the heater through built in diagnostics see pages 47 and 51 Turning the refrigerator on automatically energizes the heater Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 29 AC Power Requirements A WARNING Electric shock hazard The refrigerator receives power from more than one source Unplug the AC cord from the RV AC receptacle before servicing electrical or electronic components AUTO AC and AC Manual Mode operation require 108 to 132 Vac AC power must be supplied through a 2 pole 3 wire 20 amp grounding type receptacle AC Heaters wanuna Do not wire the heater direct Wiring the heater directly bypasses control safety devices and creates the potential for an electrical fire The two AC heaters see one heater pictured in Figure 28 are cartridge type heaters The heaters are each rated for 225 watts 120 Vac Each heater s nominal resistance is 64 Ohms Heater data Black wire Yellow wire Figure 28 AC heater When there is poor or no cooling in AUTO AC or AC Manual Mode a Measure AC voltage input to the power board b Measure heater amp draw c If amp is not as specified measure the heater s resistance at ambient temperature NOTE Heater resistance must be measured at ambient temperature When replacin
49. e harness 56 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual Water Fill Tube The water fill tube connects the water fill line to the ice maker It penetrates into the freezer cabinet from the rear ofthe refrigerator This tube is factory installed and sealed and should not be disturbed or removed it cannot be replaced See Figure 52 for the location of the water fill tube Fill tube Water Fill Line The water fill line connects the water fill tube to the water valve at the bottom of the refrigerator It is constructed of 1 4 inch plastic tubing It connects to the water valve and water fill tube with 1 4 inch compression style fittings See Figure 52 The water line is encased in a 12 Vdc foil style strip heater To replace the water fill line the refrigerator must be removed from the enclosure 11 1SJEAA To ice maker 12 Vdc Water Line Heater The water line heater encases the entire length of I I I I T the water fill line This heater operates on 12 Vdc Water valve Heater operation is automatically controlled by a small thermostat See Figure 52 The thermostat is clipped to the water valve bracket It turns on the heater when the surrounding temperature is 38 F 4 34 to 42 F It turns off the heater when the temperature rises to 48 F Water line heater connection VA 7 Figure 52 Water
50. e harness connector from power board terminal P1 12 Remove the two 1 4 hex head screws attaching the board to the base then remove the power board along with its base DC power terminals AC power AC heater Flapper heater Spark sense terminals terminals terminals electrode termnial F3fuse Wire harness 5 amp fuse Gas valve AC power connector P1 DC power F1 terminals Figure 39 1200 power board Installation Power Board 8 9 Seat the power board in the base Attach the power board and base assembly to the refrigerator using two 1 4 in self tapping hex head screws Do not overtighten screws Connect the wire harness connector to the power board terminal P1 Connect the AC heaters wires to terminals AC_ HI AC HI 2 AC LOandAC LO 2 When connectiong the AC heaters wires be sure to connect both yellow wires and then both black wires to the correct terminals Install the power board cover with three screws Do not overtighten screws Connect the solenoid gas valve wires to terminals GV and GV GND Connect the spark sense electrode wire to the power board high tension terminal Connect the AC power cord to the power board Connect the flapper heater wires to the power board 10 Plug AC power cord into the RV ac receptacle 11 Connect DC power to the power board Positive wire to terminal 12VDC W Negative wire to terminal 12 VGND1 Ice maker and or water dip
51. e the cooling unit The cooling unit or its performance are not affected when the vehicle is in motion Gradual Decrease in Cooling Efficiency A gradual decrease in cooling efficiency can be caused by the following factors Ventilation obstruction Heat source failure Off level operation Lack of service or maintenance Inadequate repairs Unauthorized field modifications Cooling unit failure Note that a gradual decrease in cooling efficiency is not always an indication of cooling unit failure If any of these factors exist and are not corrected a replacement cooling unit will also perform inefficiently or fail Step by step troubleshooting is the best approach when dealing with a gradual decrease in cooling It is important to consider that the cooling unit is working though not efficiently A Cooling System Diagnostic Flowchart can be found on pages 34 and 35 The cooling unit must reach peak efficiency before troubleshooting can take place It takes an average of four hours for the refrigerant to reach peak efficiency This time frame depends on ambient air temperature Additionally ambient air temperature plays a significant role if the unit was not installed correctly Incorrect installation leads to poor ventilation which in turn relates to poor cooling performance The unit s service and maintenance history should also be considered when checking a cooling unit for poor cooling performance The service histo
52. enoid gas valve 2 Set gas lock out See NOTE 2 3 Sound the alarm an intermittent beeping tone 4 Provide avisual warning by flashing the AC and LP lights alternatively while flashing no on the display as shown below M a Es ALP GASE naj5 5 Record and store the no AC and no LP faults in diagnostics nonvolatile memory fault history AUTO LP mode remains in gas lock out until a full cooling cycle on AUTO AC is completed Gas lock out can also be cleared by turning the refrigerator OFF then back ON Troubleshooting No Flame and No AC Faults Use the following references to identify troubleshoot and correct an ignition failure and or no AC faults m Page 10 no FL no LP fault codes troubleshooting flowchart m Page 13 no AC fault codes troubleshooting flowchart Page 47 Diagnostic Mode Screen or page 50 Diagnostic Mode Screen 4 42 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual AC Manual Mode In the AC Manual mode AC power is the only heat energy source selected by the controls When AC Manual Mode is selected 1 The AC light flashes as the controls Ce m eR start the search for AC power PTS l 2 When AC power is detected the AC lights feas remains on PTS No AC Power or Loss of AC Power If the controls do not sense the presence of AC power or when AC power is lost in AC Manual mode the
53. enser units Reinstall the water valve and bracket assembly 12 Turn ON the RV DC power to the refrigerator 13 Turn ON refrigerator then check all power board control functions before placing in service 40 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual TEMP SET Switch y Press momentarily to view temperature setting Press and hold to select a temperature setting gt Settings 1 cold 9 coldest CONTROLS Two 7 Segmet LED Display y Shows operation mode AUTO AC and LP Shows fault codes and diagnostic information Power Switch y Press momentarily to turn ON refrigerator y Press and release after three seconds to turn OFF refrigerator MODE Switch gt Press momentarily to display operating mode Press and hold to select AUTO AC or LP Manual Mode y Release when desired mode displays Figure 40 Optical control assembly serial numbers 832170 and lower TEMP SET Switch y Press momentarily to view temperature setting y Press and hold to select a temperature setting y Settings 17 cold 9 coldest Im IINE C 7A COLD 9 COLDEST Two 7 Segmet LED Display Shows operation mode AUTO AC and LP SET TEMP Power Switch Press momentarily to turn ON refrigerator Press and release after three seconds to turn OFF refrigerator MODE OFF MODE Switch Press momentarily to display operating mode y Shows fault
54. fications Prevent child entrapment Before disposing of the refrigerator remove all doors and fasten all shelves with retainers Asome of the refrigerator s metal components have sharp corners and edges Wear hand protection such as cut resistant gloves and exercise extreme care when handling the refrigerator Make sure all hardware such as hinges and fasteners retaining screws etc is properly fastened ASS Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 3 SPECIFICATIONS 1200XX 120X IMXX Models Storage volume Freezer Fresh food compartment Rough opening dimensions H x W x D 1200XX 120X IMXX Decorative panels dimensions Thickness Freezer door H x W 17 17 32 in x 16 11 16 in each door Fresh food compartment door 40 11 32 in x 16 13 64 in each door Controls yp Electronic with built in diagnostic function ON OFF MODE TEMP SET switches Flush push button style Temperature settings 1 cold 9 coldest Temperature sensor Thermistor fin mounted Off level operating limits Side to side 3 degrees maximum Front to back 6 degrees maximum DC power Controls operating voltage DC fuse F1 in power board Units with serial numbers 51660 and lower 3A violet color automotive blade type Units with serial numbers 51661 to 8321171 Two 3A violet color automotive blade type Units with serial numbers 8321172 and higher 5 A tan color automotive blade typ
55. firms that the LED screen and LED lights are operational All LED segments and LED lights should light See illustration coia CEEE coldest EL pA OIL que Ifthe screen segments or lights do not match the ones shown in the illustration the fault is in the optical control assembly Replacing the optical control should resolve the fault See page 41 Press the button to bring up screen 2 Screen 2 LED Segments Reliability Check Screen 2 diagnostics continue to confirm the reliability of the display The numerical LED segments and the LED lights turn off See illustration coia DRC C coidest NORCOLD TEMP Orr SET L DA AUTO AC LP GAS mm Ifany ofthe LED screen segments or LED lights display the fault is in the optical control assembly Replacing the optical control should resolve the fault See page 41 Press the button to bring up screen 3 Screen 3 Inputs and Outputs Screen 3 displays the real time activity of the refrigerator pA Es Pon GAS Screen 4 Inputs and Outputs Screen 4 displays the real time activity of the refrigerator Selected operating mode displayed on the mode lights Press the button to bring up screen 5 Screen 5 Stored Fault History Screen 5 displays stored fault history using LED lights If a fault occurred its assigned fault history LED will be on Agnition failure occured Flame sense failure occured
56. g the AC heater make sure the stop bead rests fully against heater tube rim Figure 28 shows the location of the stop bead AC Heater Circuit Fuse The AC circuit fuse is a fast acting 5 amp x 1 AGC type It is on the power board terminal F3 Power Board AC Power Cord A WARNING The following warning is present on each AC cord and should be strictly followed This appliance is equipped with a three prong grounding plug for your protection against shock hazards and should be plugged into a properly grounded three prong receptacle Do not cut or remove the grounding prong from this plug The power board is supplied AC power through the black AC power cord See Figure 29 Do not modify or cut the cord s grounding prong Always make sure that ground wire green wire is tightly fastened to the refrigerator cabinet metal plate The rounded side of the AC cord s power board connection must be connected to the power board with the rounded side facing left r l Y Power board d connection 5 K EJ SS ST 7 gt a Pa Mf Ground wire Z P N Figure 29 Power board AC power cord 30 1200 120 Models www norcold com cda Refrigerator Service Manual Ice Maker AC Power Cord Earlier Models On earlier models the ice maker power cord and the AC power cord are connected as one unit Figure 30 shows the AC power cord for earlier models wit
57. g to make full contact with internal terminals Voltage at the motor should measure 108 to 132 Vac Voltage higher than 132 Vac check incoming ac power source and correct overvoltage condition DISCONNECT PONER TO REMOVE MODULE 1851 115 04 WS 106 626649 014303 2 Voltage lower than 108 Vac check incoming ac power source and correct under voltage condition No voltage present check wire connections and continuity through thermal fuse Winterization To winterize the water valve and water line 1 Shut off RV water supply to the ice maker Figure 63 Checking voltage to motor 2 Raise and lock shutoff arm in OFF position 3 Disconnectthe water inlet adapter from water valve 4 Disconnect the ice maker water line from water valve NOTE Do not unwrap the water line heater wire from the water valve outlet connection 5 Drain RV water supply line and ice maker water fill line 6 Bag and tape shut all connections Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 63 EN Publication No 618968B 02 18 05 NORCOLD INC CUSTOMER SERVICE NORCOLD INC Telephone 1 800 444 7210 P O Box 4248 937 497 3183 Sidney OH 45365 4248 World Wide Web www norcold com cda
58. g up screen 9 MODE Screen Power Board DC Voltage Status Screen 9 displays DC voltage status using lighted LED segments The illustration below provides DC voltage status information and assigned LED segments If DC voltage at the power board is within normal range 10 5 to 15 4 Vdc LED segment 4 will be on DC voltage higher than 15 4 volts Screen DC voltage normal Number DC voltage lower than 10 5 volts Press the button to bring up screen 0 MODE Screen T Power Board AC Voltage Status Screen 0 displays AC voltage status using lighted LED segments The illustration below provides AC voltage status information and assigned LED segments If AC voltage at the power board is within normal range 108 to 132 Vac LED segment 4 will be on AC voltage higher than 132 volts Screen Number AC voltage normal AC voltage lower than 108 volts Press the button to return to screen 1 MODE Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 51 WIRING PICTORIALS AND DIAGRAMS SN 832170 AND BELOW MEMBRANE SWITCH
59. gures 16 and 17 To manually shut off gas to the burner pull the handle slightly away from the body of the valve then turn it one quarter turn 90 degrees counterclockwise Units with serial numbers lower than 657908 manufactured before 02 16 99 are equipped with the old style solenoid gas valve See Figures 16 and Figure 18 page 26 Units with serial numbers 657908 and higher manufactured on or after 02 16 99 are equipped with the new style solenoid gas valve See Figure 17 and Figure 20 page 26 Solenoid Gas Valve Connections For both the old and new style valves the solenoid gas valve inlet fitting is 3 8 inch with male threads the outlet fitting is 1 4 inch with male threads Replacing Old Style Gas Valve When replacing an old style solenoid valve with a new style valve use the NORCOLD gas valve conversion kit part number 621334 This kit contains the new style solenoid gas valve the required hardware and instructions Power connections Manual shutoff valve in DFF position Figure 17 New style solenoid gas valve SN gt 657908 www norcold com cda 1200XX 120X IMXX Models 25 Old style solenoid Figure 18 Components of new style solenoid gas valve Figure 20 Components of old style solenoid gas valve Orifice A Retaining screw 5 slot burner WARNING Do not separate orifice from its adapter Separating the assembly breaks the seal and will cause LP gas Orifice assemb
60. he C buttons at the same time 2 Release the J buttons as soon as TEME screen displays 3 Afew seconds later EJE displays Changing Screens To change screens press and hold the button until the next screen displays Exiting the Diagnostic Mode To exit the Diagnostic Mode 1 Press and hold N and C buttons at the TEMP same time 2 Release the buttons as soon as the MODE SET display shows Turning the refrigerator OFF then back ON also exits the Diagnostic Mode Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 49 Screens and Diagnostic Segments Information Screen Diagnostic Mode Active Screen 1 confirms that the Diagnostic Mode is active A few seconds after the screen number appears all LED segments light See illustration qum ES If the screen segments do not match the ones shown in the illustration the fault is in the optical control assembly Replacing the optical control should resolve the fault See page 41 Press the button to bring up screen 2 Screen LED Segments Reliability Check Screen 2 diagnostics continue to confirm the reliability of the display After a few seconds only the ON light displays All other LED segments should be off See illustration lt ON Lig
61. hout ice makers Figure 30a andthe AC power cord for earlier models with an ice maker Figure 30b Ice Maker AC Power Cord Later Models The ice maker is supplied AC power through the white AC power cord which is separate from the power board AC cord The cord and its connections to the ice maker wire harness are shownin Figure 31 The ice maker cord can be detached from the power board AC cord by cutting the two plastic cable ties holding them together b Smooth black lead to black ice maker wire Ribbed black lead to white ice maker wire I I I I I I I I I I H I Ground wire I I REFRIGERATORS WITH ICE MAKERS 9 4 Ground wire REFRIGERATORS WITHOUT ICE MAKERS Figure 30 AC power cord older models To ice maker wire harness Ground To refrigerator metal plate Ribbed wire female connector To white ice maker wire Smooth wire male connector To black ice maker wire Brown wire female connector To water valve solenoid Figure 31 Ice maker power cord Thermostatic switch 12 Vdc Ventilation Fans The two ventilation fans are located on top of the absorber coils on the back of the refrigerator They are attached to the absorber coils by brackets and mounting screws See Figure 32 Ventilation fans are supplied 12 Vdc through power board connections Although the power board supplies power to the fans it does n
62. hout this manual WARNING The above heading identifies hazards or conditions which if ignored can cause serious injury death and or extensive property damage A CAUTION The above heading identifies hazards which if ignored can cause injury and or property damage Safety Statements ADo not modify alter or equip the refrigerator to the use of any other fuel natural gas butane etc 1200 refrigerators are designed and equipped for the use of LP gas propane gas only Alncorrect installation adjustment alteration or maintenance of the refrigerator can cause personal injury property damage or both not smoke light fires or create sparks when working on the propane gas system ADo not use an open flame for leak testing any of the propane gas system components Propane gas is highly flammable and explosive A Always use two wrenches to tighten or loosen LP gas connections Damaged connections piping and components create the potential for gas leaks Ai electrical connections and repairs to the refrigerator must comply with all applicable codes Refer to the certification and code requirements section of the 1200XX 120X IMXX Installation Manual for more information amp Do not work on live electrical circuits Turn off AC power and DC power sources before attempting to remove service or repair any of the refrigerator s electrical or electronic components Apo not modify bypass
63. ht The ON light should be the only LED displayed If any other LED displays the fault is in the optical control assembly Replacing the optical control should resolve the fault See page 41 Press the button to bring screen MODE Screen Thermistor Fin Temperature Screen 3 displays the actual fin temperature being sensed by the thermistor This is not the fresh food cabinet air temperature The illustration shows 32 F fin temperature as displayed in screen 3 32 F l Press the button to bring screen 4 Screen Stored Fault History Screen 4 displays stored fault history using lighted LED segments The illustration provides fault history information with assigned LED segments If a fault occurred its assigned fault history LED will be on Door ajar Ignition fault DC voltage low DC voltage high AC relay stuck closed Screen Number AC heater failed open AC mode selected but not available Press the button to bring up screen 5 MODE Screen Stored Fault History Screen 5 also displays stored fault history using lighted LED segments The illustration provides fault history information with assigned LED segments If a fault occurred its assigned fault history LED will be on Flame sense failure Thermistor failure Screen Number AC voltage high AC voltage low Press the 1 button to bring up screen 6 MODE Screen
64. inet to the enclosure floor with the mounting flange screws 6 Install drip cup then install drip cup retaining screw Ice maker and or dispenser models a Connect the water supply line to the ice maker Cabinet retaining dispenser water valve screw hole b Open the water supply to the ice maker dispenser Figure 38 Top trim and cabinet retaining screws c Check for water leaks 7 Connect the RV LP gas supply line to the gas valve inlet fitting 8 Open the solenoid gas valve manual shut off 9 Plug the refrigerator AC power cord into the RV receptacle 10 Connect the RV DC power supply wires to power board terminals 12VDC and 12V_GND1 11 Open the LP gas tank valve s then leak test LP gas connection at solenoid gas valve 12 Leak test the burner solenoid gas valve and orifice assembly burner tube connections 13 Place refrigerator in service ASS Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 39 ELECTRONIC COMPONENTS Description Inputs outputs monitoring and diagnostic functions are managed and controlled by the power board Inputs outputs monitoring information and diagnostic functions are communicated through the optical control assembly The wire harness interfacing the power board with the optical control assembly is foamed into the cabinet Wiring pictorials and schematics can be found on pages 52 55 Because the wire harness is foamed into
65. instructions Pour installation vehicule de plaisance Degagement minimum pour l installation CERTIFIED 0 coles haut bas arriere Installer uniquement avec latrousse n 3 Voir les instructions d installation CSA 1 10 2003 ANSI Z221 19 2003 REFRIGERATORS REFRIGERATORS Figure 1 Refrigerator information label location Serial Number XXXXXX NORCOLD Made in USA Bar code label na NORCOLD Plain text label Made in USA Figure 2 Cooling unit bar code label location 2 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual Safety Notice It is not possible to anticipate all of the conceivable ways or conditions under which the refrigerator may be serviced or to provide cautions as to all of the possible hazards that may result Standard and accepted safety precautions and equipment should be used when working on electrical circuits and handling toxic or flammable materials Safety goggles and other required protection should be used during any process that can cause material to become airborne such as removing a leaking cooling unit and cleaning components Attention Statements The safety alert symbol followed by the word WARNING or CAUTION identifies potential safety hazards or conditions SAFETY AWARENESS The safety alert symbol with the appropriate heading appears on all safety labels posted on the refrigerator and safety awareness notices presented throug
66. ipple output of AC DC converters can cause the electronic controls to set false fault codes It can also turn off the refrigerator or prevent the refrigerator from turning off Lamp Thermistor Assembly The operation of the fresh food compartment 12 Vdc lamp is controlled by two switches mounted on the top of the fresh food cabinet and activated by the fresh food cabinet doors Leaving the door ajar or open for more than two minutes causes the controls to display a dr fault code Closing the door turns off the light and clears the dr fault from the display The fault code is stored in the diagnostic mode nonvolatile memory For dr troubleshooting procedures see page 16 As shown in Figure 27 the light assembly harness and thermistor share the same connector On older models SN 832170 and lower the thermistor is attached to the twentieth fin from the right on the fin assembly On models SN 832170 and higher or models that have had a new style power board installed the thermistor is attached to the second fin from the right The thermistor senses fin temperature which can be accessed through the Diagnostic Mode pages 48 and 50 If the thermistor fails the controls will activate Backup Operation System page 17 gt Light bracket 4 Lightbulb lt lt um cover 24 Clip La _ Thermistor Figure 27 Lamp thermistor assembly Divider Heater The divider heater is permanently foamed between th
67. l 1200XX 120X IMXX refrigerators have two factory installed fans W Fresh air must be directed to flow through the surface areas of the absorber coils condenser fins and the outer surface of the canister W Corners and structural pockets where heated air may stagnate must be reduced in size or completely eliminated Two baffles are required for the 1200XX 120X IMXX model in double sidewall venting applications It should be noted that baffle arrangements are different if the enclosure depth is greater or less than 26 inches The baffle configurations are shown in Figure 12 page 22 and Figure 13 page 23 Air Intake Vent The ventilation and combustion air flow into the enclosure is through the air intake vent See Figure 12 page 22 and Figure 13 page 23 Sidewall Exhaust Vent The heat absorbed by ventilation air and combustion gases flow out of the enclosure through the sidewall exhaust vent See Figure 1 page 22 and Figure 13 page 23 for details Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 21 Distance between wall and rear of refrigerator less than 2 0 in Aluminum or galvanized steel sheet Distance between rear of refrigerator full width baffle condenser and baffle 0 25 in 0 1in lt 0 25in Distance between bottom of refrigerator condenser and top of baffle 0 25 in 621156 Vent Align horizontally with lower vent
68. lation instructions and special The roof exhaust vent is equipped with a non construction exceptions removable metal mesh screen that prevents leaves debris birds or rodents from getting into the enclosure Air Intake Vent The roof cap is fastened to the exhaust vent with four The ventilation and combustion air flows into the screws The cap is always installed with the slope enclosure through the air intake vent See Figure 9 towards the front of the RV RV front gt Roof exhaust vent RDS RAD A Exhaust vent screen Baffle Full width of enclosure to isolate the top of refrigerator from rejected heat iid inch Y or less Condenser 1 8 inch maximum if wider see Figure 10 page 20 Baffles required when opening between outside wall and cooling unit is over 1 inch 2 L u _ 722 K NUL 1 E Absorber coils Must be 2 between 3and4 inches Intake vent lt Figure 9 Roof exhaust venting arrangement Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 19 Roof exhaust vent Top baffle required when the clearance from the underside of the roof to the top of the refrigerator exceeds 1 4 inch Condenser D Z u Side wall baffles required when
69. ly to leak The orifice see Figure 21 controls the flow of propane gas to the burner 1200XX 120X IMXX units with serial Primary air intake holes 3 numbers 882583 and lower use the 0 190 jeweled style orifice See Figure 22 Units with serial numbers higher than 882583 use the N18 cap style orifice See Figure 23 Installing a smaller larger or damaged orifice will affect combustion Figure 21 Burner assembly and orifice Burner The burner shown in Figure 21 houses the orifice Size stamped on flat Jewel provides primary air for combustion and is the fuel mixing chamber Primary combustion air flows into the burner through the three primary air intake holes Carbon deposits on the burner slots is the main cause of no cooling or poor cooling performance when the refrigerator operates in the LP gas mode 0 19C Burner Tube The burner tube is 1 4 inch OD aluminum tubing with an anti vibration loop Each end of the tube is double flared See Figure 19 Figure 22 0 190 jeweled orifice Burner connection Size stamped on orifice end Ew C oO Gas valve connection Figure 19 Burner tube Figure 23 N18 orifice 26 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual Flue The flue comes equipped with a removable baffle and a metal flue cap The flue on the 1200XX 120X IMXX model ends a few inches above the canister See Figure 24 The flue along with the baffle
70. nner bore of the burner A WARNING Do not insert any type of cleaning tool or wire into the orifice Do not drill or ream the orifice opening to clean it Insertion of any type of cleaning tools reaming or drilling through the opening will alter the volume of LP gas flow to the burner and creates a fire hazard potential 11 Visually inspect the orifice If dirty wash the assembly with alcohol then allow to air dry If cleaning fails to remove dirt or if the condition of the orifice assembly is questionable replace the orifice assembly 12 Clean dirt or debris from the burner box base 13 Reinstall the burner Do not overtighten the retaining screw A CAUTION To avoid gas leaks and prevent damage to connections piping and components always use two wrenches to tighten the burner tube Adamaged burner tube creates a potential for gas leaks 14 Install the orifice assembly Thread the orifice assembly into the burner finger tight then finish tightening using two wrenches 15 Connect the burner tube Thread the fitting finger tight then finish tightening using two wrenches 16 Install the burner box cover Do not overtighten the retaining screw 17 Open the LP gas tank valve 18 Open the solenoid gas valve manual shut off 19 Turn ON the refrigerator and select the LP Manual Mode operation 20 Leak test LP gas connections during the 30 second trial for ignition A WARNING Do not attempt t
71. o 6 lowering the setting to 5 will shorten the disconnected or fails The BOS maintains cooling by Cooling cycle controlling the heat source selected When the 1200XX 120X IMXX Backup Operation SN 832170 refrigerator is operating in BOS the length of the and Lower cooling cycle is regulated by time rather than When the 1200XX 120X IMXX controls shift to BOS regulated by temperature operation the temperature setting flashes until the To accomplish this the BOS adjusts the length of the refrigerator is no longer in BOS cooling cycle according to the temperature setting 1200XX 120X IMXX Backup Operation SN 832171 selected by the user the higher the temperature and Higher setting the longer the cooling cycle For example if When the 1200XX 120X IMXX controls shift to BOS the temperature setting is set to 5 raising the setting operation the temperature setting flashes for ten to 6 will lengthen the cooling cycle making the seconds when the TEMP button is pressed After ten cabinet colder seconds the ON LED displays Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 17 ASS For more information on the no co fault code no co Fault Code No cooling detected by the controls S N 832171 and higher Fault indicator displayed Check for cooling at fin assembly Cooling detected Check for completion of cooling cycle after resetting power board code show
72. o repair LP gas leaks with the refrigerator in operation Before attempting to repair a gas leak m Turn OFF the refrigerator E Close the LP gas valve and the solenoid gas valve manual shut off 28 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual ELECTRICAL REQUIREMENTS AND COMPONENTS DC Voltage Requirements and Polarity The operating controls require 10 5 to 15 4 Vdc to operate The positive wire lead connects to power board terminal 12VDC the negative wire lead connects to terminal GND1 Power Board DC Fuse A WARNING Never replace a fuse with a higher amp rated fuse Always use the specified fuse The controls circuit fuse is a standard automotive blade type fuse It is located on the power board terminal F1 DC Power Wiring Requirements A WARNING Never use undersized wires to supply DC power to the power board The use of undersized wires can cause low voltage and high amp draw conditions The high amp draw caused by a circuit using undersized wires will cause the wire to overheat and creates an electrical fire hazard 18 AWG is the minimum AWG size wire that can be used for connecting DC power to 2 way models The fuse size for overload protection must not exceed 6 amps AC DC Converter as Power Source The power board must be supplied 12 Vdc only from the filtered output battery side of a converter Unfiltered voltage commonly referred to as AC r
73. ollowing references to identify troubleshoot and correct a no AC fault W Page 13 no AC fault codes troubleshooting flowchart W Page 47 Diagnostic Mode Screen 3 page 50 Diagnostic Mode Screen 4 LP Manual Mode In the LP Manual Mode LP gas is the only heat energy source selected by the controls When the controls shift to LP Manual mode 1 The LP mode indicator LP displays and the controls start a 30 second trial LF for ignition 2 The LP mode indicator turns off when the controls sense a flame The ON LED displays See NOTE 7 NOTE 7 Pressing the MODE pushbutton displays the LP mode indicator Flame Fails to Ignite or Flame Goes Out If the controls do not sense a flame within the 30 second trial for ignition or the flame goes out the controls 1 Shutoff power to the solenoid gas valve 2 Set gas lock out See NOTE 8 below 3 Display a flashing visual warning no FL shown below 4 Soundan audible alarm The alarm is an intermittent beeping tone Pressing the MODE pushbutton silences the alarm A terna ting Display AUTO LP mode remains in gas lock out until a full cooling cycle on AUTO AC is completed Gas lock out can also be cleared by turning the refrigerator OFF then back ON Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 45 DIAGNOSTIC MODE S N 832170 AND BELOW LED lights
74. or switches Temperature switch Flapper heater Fans Water line heater Door contacts amp GG 660909 Dispenser light Dispenser valve Water valve heater Dispenser water line heater Dispenser microswitch Ice maker water line heater Ignitor Temperature switch Figure 50 1200XX 120X IMXX wiring diagram SN 832171 and above Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 55 ICE MAKER COMPONENTS AND SERVICE The ice maker is a factory installed accessory located on the right side ofthe freezer compartment The components that support the ice maker are the wire harness water fill tube water fill line and water valve An ice maker cannot be added to a refrigerator that was manufactured without an ice maker Specifications Cycle One revolution eject and water fill Water fill capacity 4 7 fl oz 140 mL Ice yield 3 5 lbs 24 hrs approximate Cycle duration 3 5 to 7 minutes Electrical rating 185 W 115 Vac 60 Hz Amp draw Cycle on heater on 1 6A Cycle on heater off 0 3A CV CIO Off etre tenere tees No amp draw 1 5 W 8800 Mold heater tette 185 W 72 O Wire Harness The ice maker wire harness see Figure 51 connects the ice maker to the 120 Vac ice maker p
75. ort electrical components and or damage electronic circuits A CAUTION Do not use leak test solutions that contain ammonia or chlorine Ammonia and chlorine attack copper and brass components Leak testing can be accomplished using an electronic leak detector or a commercial grade leak test solution The use of homemade soap and water leak test solutions should be avoided if possible When applying a leak test solution apply the solution over the entire joint using a small brush or spray applicator Due to low system operating pressure it may take few minutes for bubbles to appear if the connection is leaking Hidden joints should be examined thoroughly using an inspection mirror A CAUTION When working on the refrigerator LP gas system Components BDo not alter or modify the burner tube anti vibration loop not cross thread fittings Exercise extreme care when connecting and disconnecting fittings test all of the refrigerator propane gas system fittings after service replacement or Pressure test port 1 8 NPT plug Bracket Manual shutoff shown open Figure 16 Old style solenoid gas valve SN 657908 Solenoid Gas Valve The electronic controls automatically opens and closes the solenoid gas valve The solenoid gas valve also has a manual shut off and capped pressure test port The valve s manual shut off is a spring loaded quarter turn manually operated valve See Fi
76. ot control the fans operation Fan operation is controlled by the fan thermostatic switch located on the condenser Fan operation is automatically controlled by a thermostatic switch The thermostatic switch is mounted on the first condenser fin See Figure 33 The switch turns the fan on when the temperature is approximately 130 F The switch turns the fan off when fin temperature drops to approximately 115 F Fan mounting screws Bracket mounting screws Figure 32 Fans mounted on the top absorber coil To red fan wire First fin From power board Figure 33 Fan thermostat Refrigerator Service Manual ASS www norcold com cda 1200XX 120X IMXX Models 31 COOLING UNIT Description The cooling unit is a self contained gravity flow absorption refrigeration system The refrigerant charge is a solution of water ammonia sodium hydroxide and sodium chromate a corrosion inhibitor Refrigeration is accomplished by applying heat energy and venting the heat extracted from the freezer and fresh food cabinet while maintaining the unit leveled Heat Absorption The refrigerant transfers the heat from the freezer and the food cabinet to the absorber coils At the absorber coils the metal surface absorbs the heat and air flow over the external surfaces of the coils carries away the heat A thermal air current is created by the rising hot air and flows
77. out of the enclosure through the roof exhaust vent or sidewall exhaust vent depending on installation The flowing air mass passes over the surface of the condenser fins where it absorbs heat transferred from the ammonia vapors flowing through the condenser The thermal airflow process creates a chimney effect The fresh air drafted by the chimney effect through the intake vent removes rejected heat supports combustion and expels the exhaust gases produced by the combustion process Any obstruction restriction or modification to vents or the enclosure will affect the cooling cycle Poor cooling unit performance may be due to Loose insulation interfering with the ventilation process B Construction material or debris left in the enclosure Insect screening covering vents Plastic sheeting covering vents Items stored in the enclosure Modifications to vents or enclosure m Noroofor sidewall exhaust vent opening Information pertaining to ventilation and enclosure requirements appears on pages 19 23 Leveled Operation The circulation of the refrigerant through the cooling unit is accomplished by gravity flow therefore the refrigerator must be operated leveled Off level operation will effect the flow of the refrigerant through the cooling system The maximum off level operation limits are degrees from side to side B 6degrees from front to back Exceeding the maximum off level limits can permanently damag
78. ower cord The assembly is bundled together with plastic ties The wire harness runs through the surface of the cooling unit foam plug On the upper ice maker end the harness has a modular plug with a locking tab see Figure 51 Each wire on the harness has the appropriate connector to connect to the ice maker AC power cord white AC cord The four wires making up the wire harness are Black Line voltage L black wire with female quick connect terminal This conductor is equipped with a thermal fuse The thermal fuse is held onto the ice mold by a spring clip B White Neutral N white wire with male quick connect terminal It connects to the AC power cord neutral wire Brown Water valve line voltage brown wire with female quick connect terminal It connects to the water valve solenoid terminal M Green Ground wire green wire with lug terminal It connects to the refrigerator cabinet metal plate The refrigerator has to be removed from the enclosure to replace the ice maker wire harness The ice maker wire harness is not the same as nor connected to the wire harness that serves the power board and the optical display assembly as described on pages 40 and 41 0 Ice maker connector Black connects to smooth ac wire Green connects to metal plate White connects to ribbed ac wire Brown connects to water valve Figure 51 Ice maker wir
79. page 38 22 Separate the cooling unit from the refrigerator cabinet To separate a Grab the cooling unit by the liquid heat exchanger b Pull cooling unit upward at a slight angle to unseat the foam plug 23 Remove the cooling unit from the cabinet Installation of Replacement Cooling Unit 1 Clean the old sealant from the back of the evaporator plate fin assembly and cabinet step A CAUTION Use only the NORCOLD approved sealant that is packaged with the new cooling unit Do not use silicon latex or other sealant which may cause damage to the foam and will greatly reduce cooling efficiency The sealant must be applied correctly to prevent air from being drawn into the cooling unit s high and low evaporators 2 Apply a 1 2 inch bead of sealant to the replacement cooling unit s low and high temperature evaporators and to the foam plug step See Figure 36 page 38 3 Insert the drip tube through the foam block opening 4 Mate the cooling unit foam plug section to the cabinet step opening The foam plug must seat evenly against the cabinet step 5 Install the condenser retaining screw Do not overtighten the condenser retaining screw 6 Install the freezer plate screws to the cooling unit eight screws with washers Do not overtighten the freezer plate screws 7 Install the fin assembly retaining screws to the cooling unit four screws Do not overtighten fin Screws 8 Attach the thermistor
80. ry and the scope of service work performed may lead directly to the cause and resolution of a cooling problem Cooling Performance Monitoring Control Units with Serial Numbers 832171 and Higher Only The Cooling Unit Monitoring Control monitors the fin assembly temperature through the thermistor This control activates when the refrigerator is turned on or if the fin temperature rises above 40 F When the temperature is above 40 F and a change in cooling is not detected in a specific amount of time the refrigeration heat sources are turned off The Cooling Unit Monitoring Control will not activate if The fin assembly temperature stays below 40 F lfthe thermistor is disconnected open or shorted lfthe fresh food compartment door is sensed open resampling starts when door closes B TheAC heater is open AC voltage is low B Frost management is active 32 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual Cooling Unit Monitoring Control Operation The Cooling Unit Monitoring Control operates in the following sequence 1 Because the fin temperature is above 40 F when the refrigerator is turned ON sampling begins when the refrigerator is turned ON and stops when the temperature falls below 40 F 2 The Control activates when the fin temperature rises above 40 F while the refrigerator controls are demanding cooling 3 Control samples the fin temperature every ten
81. s before cycle see pages 32 25 Power Board Resetting Procedure 1 2 oo st Turn OFF the refrigerator Disconnect the following from power board a 12 Vdc positive and negative wires b AC power cord c Solenoid gas valve wires d Spark sense electrode assembly wires Remove the power board cover Reconnect 12 Vdc positive and negative wire Turn ON the refrigerator Locate Pin 15 on 16 pin connector P1 Pin 15 is the empty socket to the right of the white violet wire on the top row See Figure 9 Using an insulated jumper wire short Pin 15 to the power board ground lug for 10 15 seconds A click sound will indicate when the controls are reset See Figure 8 A jumper wire to short Pin 15 to ground can be made from a six inch long insulated 22 AWG wire with a 1 2 inch of insulation stripped from each end 8 Turn OFF the refrigerator 9 Turn ON refrigerator If no co code displays repeat steps 7 9 no and co Flashing mm MODE ON OFF 1 Check for ventilation obstructions and leveled operation 2 Reset power board as shown in Figure 8 and described in procedure below 3 Allow unit to operate normally Cooling unit is good Recheck for ventilation obstructions and leveled operation 1 Replace cooling unit if no co shows before completing a full cooling cycle 2 Reset power board as shown in Figure 8 and described in procedure below 10 T
82. stor Failure Fault Controls in Backup Operating Controls T 40 System MOG 16 Optical Control 0 40 Backup Operating System BOS 16 Replacing Optical Control Assembly 40 1200XX 120X IMXX Backup Operation 16 AUTO Operation sisi 41 Power Board Resetting Procedure 17 Modes of Operation S N 832170 and Lower 41 no co Fault Code No cooling detected by the controls S x 41 N 832171 and higher 17 AUTO LP Operation ene 41 ls Shift from AUTO LP GAS to AUTO AC 41 Ventilation fee i 18 No AC Power and No Flame 41 Roof Exhaust Venting 18 Troubleshooting No Flame and No AC Faults 41 Air Intake Vent 18 AG Manual Mode 22522000 l u ene ee 42 Root Exhaust Vent eae 18 No AC Power or Loss of AC 42 Baffles EEUU 19 AC Power Restored een 42 Vertical Angled Baffles M 19 Troubleshooting ho AC 42 Double Sidewall Venting 2 20 LP Manual 42 Air Intake Vent sos sua lulu
83. t correctly Incorrect installation adjustments or modifications will affect cooling performance Ice maker and or dispenser models Disconnect the ice maker AC power cord from the RV outlet Close the water supply valve to the ice maker c Disconnect the RV water supply line from the ice maker dispenser water valve 7 Remove rear mounting flange screws Removing the Refrigerator and Cooling Unit 8 Remove trim pieces 9 Remove upper and lower mounting bracket screws Refer to Figure 34 to locate components 10 Remove any other mounting screws present in the 1 Turn refrigerator OFF breaker 2 Close the LP gas tank valve s 11 Remove the refrigerator from the enclosure 3 Disconnect 12 Vdc from RV DC distribution panel 4 Disconnect DC power supply from power board 5 Unplug AC power cord from RV AC receptacle 6 Disconnect the RV LP gas supply line from the gas valve 36 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual Removing Cooling Unit Ice maker and or dispenser models a Disconnect the ice maker water line from the water fill tube and dispenser water line from reservoir b Disconnect the ice maker wire harness wires white and brown wires from the water valve solenoid c Disconnect the ice maker wire harness ground wire d Remove the two water valve mounting screws and plastic spacers then remove the water valve 1 Remove the fan bracket assembly thermostat
84. ted Check cooling unit Signs of leak s cooling unit YES Any signs of leak Yellow residue inside or at the rear of the ee page 36 refrigerator W Ammonia smell NO NO Ventilation as YES 1 to id per installation Check heat input installation requirements instructions Heat input device operating within specification Correct heat input device to meet specifications Check as required m AC heater voltage and amp draw m Burner orifice flue deflector cap flue baffle m LP gas pressure YES Level refrigerator as outlined in Owner s Manual and Specifications NO Refrigerator operating leveled Maximum off level limits B 3 degrees side to side B 6 degrees front to back Continued on page 35 www norcold com cda Refrigerator Service Manual 34 1200XX 120X IMXX Models A WARNING Do not operate the refrigerator if the cooling unit is leaking or a leak is suspected Repair replace door as required Replace cooling unit See page 36 Replace cooling unit See page 36 Unit is operating normally NO YES YES From page 34 Check condition of door gaskets Door gaskets sealing properly YES Recheck cooling unit for leaks Any signs of leakage present NO Test cooling unit performance Cooling detected YES Refrigera
85. termine and correct low dc LO fault Electronic controls operate on 12 Vdc When an AC DC converter is used to supply DC power the refrigerator circuit must be connected to the appliance output terminals of the converter filtered side If the refrigerator circuit is connected to the unfiltered side the AC ripple generated by the converter may cause a dc LO fault code to display To troubleshoot a dc LO fault connect a charged 12 volt automotive battery to the power board If the dc LO code clears the fault was caused by unfiltered DC power If the dc LO code does not clear replace the power board see page 40 NOR D Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 11 dc HI Fault Code DC voltage high Before beginning this procedure m Make sure RV DC voltage to refrigerator is 10 5 to 15 4 volts m Determine if the dc HI fault code displays when the converter is the source of DC power Fault indicator displayed _ Check for DC voltage input to power board terminals 12VDC and GND1 Voltage higher than 15 4 Vdc Check RV DC power distribution to refrigerator See NOTE below to determine and correct dc HI fault Electronic controls operate on 12 Vdc When an AC DC converter is used to supply DC power the refrigerator circuit must be connected to the appliance outputterminals of the converter filtered side If the refrigerator circuit is
86. the clearance between the enclosure side walls and refrigerator exceeds 1 8 inch Fans 2 Absorber coils Intake vent Roof vent Angled baffles required when the roof exhaust vent is inboard of the condenser E 1 4 inch or less rr r rr FA _ Z Figure 10 Back view roof exhaust venting not exceed 45 degrees Baffles The minimum and maximum clearances for installing the refrigerator or correcting ventilation problems on roof vented units are listed in Table 1 below Baffles are required whenever installations exceed maximum clearances listed in Table 1 Figure 10 and Figure 11 show baffle locations A Condenser Vertical Angled Baffles Vertical angled baffles are required when the roof exhaust vent is installed inboard of the condenser Figure 11 shows the angled vertical baffles required on inboard roof vent installations The horizontal wall baffles are required whenever the distance between the cooling unit and the interior surface of the outside wall exceeds one inch Baffles required when opening between outside wall and cooling unit is over 1 inch Minimum Maximum Bottom Oinch Oinch I Sides each 0inch 1 8 inch Intake vent j Oinch 1 4 inch inch 1 inch A EEA Table 1 Clearances for roof vented installations Figure 11 Baffles required for an inboard roof exhaust vent installation
87. the cabinet itis not a replaceable component This wire harness is not connected to the ice maker wire harness described on page 56 Power Board The power board is located on the back of the refrigerator below the absorber coils It is seated on an insulated base to prevent the printed circuit from making contact with the refrigerator s cabinet metal plate The power board seated in its base is shown in Figure 39 Two self tapping 1 4 inch hex head screws hold the power board and base in place The power board cover is held by three self tapping 1 4 inch hex head screws Removal Power Board 1 Turn OFF the refrigerator 2 Turn OFF the RV DC power to the refrigerator 3 Disconnect DC power supply wires from power board terminals 12 VDC and 12 VGND1 4 Unplug the AC power cord from the RV AC receptacle 5 Disconnectthe AC cord from the power board 6 Disconnectthe flapper heater wires from the power board 7 Disconnectthe gas valve wires from power board terminals GV and GV 8 Disconnect the spark sense electrode wire Ice maker and or water dispenser units Loosen the water valve bracket then move the bracket water valve assembly out of the way 9 Remove the three 1 4 inch self tapping hex head screws from the power board cover then remove the power board cover 10 Disconnect the both AC heaters wires from the power board terminals AC Hl LO AC HI 2 andAC LO 2 11 Disconnect the wir
88. to the 2 fin counting from right to left Sealthe drain tube opening with sealant 10 Fasten the absorber brackets of the cooling unit to the cabinet two screws Do not overtighten retaining Screws 11 Tape all four edges of the foam plug to the cabinet using HVAC metallic tape or heavy duty duct tape Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 37 12 Install upper and lower cable ties to wire harness Ice maker and or dispenser models 2 i Condenser ii Ti a Reinstall the ice maker water valve retaining A 2l 1 b Reconnect the ice maker water line and Screws hi dispenser water line c Connect the brown and the white wires to the water valve solenoid terminals 13 Install the burner box then install the burner box Figure 35 Condenser angle and retaining screw retaining screw 14 Install the burner tube and burner assembly Do not overtighten fittings 15 Install the gas valve and connect the burner tube to the valve Do not overtighten fittings 16 Install the spark sense electrode assembly then install the electrode assembly retaining screw Set electrode to burner air gap 1 8 to 3 16 inch 17 Install the burner box cover then install the burner box cover retaining screw 18 Connect the AC heater wires to power board terminals AC HT LO1 andAC HT HI 19 Reinstall the power board cover Foam plug step 20 Connec
89. tor temperatures normal NO Check thermistor and power board operation See pages 17 and 18 Visual and audible signs of leak s E Yellow residue on the rear of the refrigerator E Ammonia smell E Gurgling noise not always present Cooling unit performance test 1 Disconnect thermistor from the wire harness 2 Set temperature setting to the coldest setting 3 Place thermometer in freezer 4 Allow unit to operate for 3 4 hours 5 Measure temperature The back of the freezer plate should be cool after 3 4 hours of continuous operation Temperatures given below are based on 90 F ambient temperature correct ventilation and operation at coldest setting for a period of 8 12 hours W Freezer 5 F to 10 F W Fin temperature 18 F to 25 F and 0 Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 35 Replacing the Cooling Unit MA Foam plug Wire harness Ice maker water line Power board AC cord Gas valve 8B 7 EU Condenser Cable ties Fans Absorber coils Liquid heat exchanger Drip cup Water valve Figure 34 Cooling unit and components This procedure supplements the instructions packaged with 1200 model replacement cooling unit Follow the procedure thoroughly to install the cooling uni
90. tthe gas valve wires to the power board More HET terminals GV and GV 21 Connectthe flapper heater wires 22 Plug the AC cord into the power board 23 Connect the spark sense electrode assembly to L the power board Low temp lt evaporator 1 2 bead of sealant High temp evaporator 1 2 in bead of sealant Figure 36 Application of sealant 38 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual Reinstallation of Refrigerator into Enclosure A WARNING Do not install the refrigerator if the combustion seal has been damaged Adamaged combustion seal must be replaced The seal isolates the living area of the vehicle from exhaust gases generated by LP gas combustion LP gas exhaust gases contain carbon monoxide which is an odorless colorless gas that can cause dizziness nausea or in extreme concentrations death Cabinet retaining screw holes Side trim Screw plugs Trim screws plug 1 Check the condition of the combustion seal Figure 37 Bottom trim and cabinet retaining screws Replace seal if damaged Do not install the refrigerator if the combustion seal is damaged 2 Place the refrigerator in the enclosure The combustion seal must seat fully against the enclosure wall 3 Install all cabinet retaining screws See Figures 37 and 38 Trim screw 4 Reinstall trim pieces See Figures 37 and 38 Top trim 5 Secure the back of the cab
91. ull width baffle Enclosure width Fan 32 69 in 19 P Distance between top of lower vent opening bottom of solid box baffle 4 5 25 in Al t D 621156 Vent lt 13 75 high x 21 50 wide rough opening R O Center vent R O in enclosure width Y Minimum distance between the e bottom of the enclosure and the gt E __ top of the upper vent opening t 62 in Enclosure Height 63 38 in Vent even or below enclosure floor Enclosure depths of 26 or Figure 13 Baffle arrangement for enclosures with depths 26 inches or greater ax hi Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 23 LP GAS SYSTEM Gas valve Burn Power connections Manual shutoff shown open Canister Baffle er tube Figure 14 LP gas system units with S N 882583 and lower Power connections Gas valve Burner tube Gas inlet port Canister Baffle Flue Electrode Burner OFF Gas outlet port Manual shutoff Test port in OFF position 4 Burner box Figure 15 gas system units with S N 882584 higher Pressure Requirements A WARNING When working on or near the L
92. urn OFF the refrigerator 11 12 13 Disconnect the 12 Vdc power positive and negative wires from the power board Install the power board cover Reconnect the following to the power board a Spark sense electrode assembly wire b Solenoid gas valve wires c AC power cord d 12 Vdc positive and negative wires from the power board Place refrigerator in service Grounding probe W or jumper wire A Figure 8 Resetting the power board 18 1200XX 120X IMXX Models www norcold com cda Refrigerator Service Manual VENTILATION Roof Exhaust Venting The space between the air intake vent and the rear of the refrigerator must be kept clear at alltimes Any obstruction in this area may cause serious ventilation problems The air intake vent opening also provides access for servicing cooling unit components The general guidelines for intake vents and roof exhaust vents presented in this section do not replace the instructions and or guidelines provided inthe 1200 120X IMXX Installation Manual and the Ventilation Roof Exhaust Vent Guidelines For Gas Electric Refrigerators part number 622090A 3 01 Refer to the 1200XX 120X IMXX Installation Manual and Ventilation Guidelines For Gas Electric Refrigerators for the latest information on The heat absorbed by ventilation air and combustion gases flow out of the enclosure through the roof exhaust vent See Figure 9 approved vents instal
93. wer board reset must be performed by a service center according to the procedure on page 18 Refrigerant Leakage A WARNING Do not operate the refrigerator if the cooling unit is leaking or leakage is suspected Yellow powder or liquid deposits at the rear of the refrigerator or ammonia smell inside the refrigerator indicate refrigerant leakage Exercise extreme care when handling a leaking or a suspected leaking cooling unit The cooling system refrigerant solution consists of water ammonia sodium hydroxide and sodium chromate Disposal of Cooling Unit A WARNING Do not under any circumstances release any waste or residue directly into sewers or surface waters If any liquid leaks or spills from the cooling unit contact the nearest environmental services for guidance Dispose of cooling unit according to local state and federal guidelines and regulations Dispose of any liquid waste or residue according to pre emergency planning and all applicable local state and federal regulations Refrigerator Service Manual www norcold com cda 1200XX 120X IMXX Models 33 Cooling System Diagnostic Flowchart A WARNING Do not bypass or modify the refrigerator s controls or components to diagnose the cooling system Do not wire the heater directly The heater is supplied power through a fused circuit A WARNING Do not operate the refrigerator if the cooling unit is leaking or a leak is suspec
94. wer cord white and the refrigerator AC power cord black Remove the ice bin then remove the freezer shelf Unfasten two retaining screws to detach the ice maker from mounting plate See Figure 55 Save screws Unfasten two freezer plate screws to detach mounting plate from the freezer Save screws and flat washers Retaining screws 2 Unfasten the upper bracket screws Save screws Rotate ice maker until the front of the cover faces the Freezer plate screws door opening then remove the cover 2 with flat washers Unclip the thermal fuse from the mold See Figure 56 Mounting plate Unplug the wire harness connector See Figure 56 Remove shutoff arm Save shutoff arm Figure 55 Ice maker screw locations Installation of replacement ice maker 1 2 3 10 11 12 Cut tab on ice maker and fold as shown in Figure 55 Install the shutoff arm onto the replacement ice maker Plug the wire harness connector into the ice maker Make sure connector locks into ice maker connector Clip the thermal fuse to the mold Install the cover then rotate ice maker parallel with the freezer plate then align the upper bracket with screw holes Install and fasten the upper bracket screws Do not overtighten screws Install the mounting plate Fasten the mounting plate to the ice maker with two retaining screws Do not overtighten retaining screws Install retaining screws to fasten the ice maker to the

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