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Norcold N109X Series Service Manual

Gas/electric refrigerators
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See also: Owner's Manual , Installation Manual
Service Manual
Gas/Electric Refrigerators
MODELS
N109XXX
N109XIMXX
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 intake
and exhaust ventilation for correct and safe operation. Any other ventilation
could cause lethal combustion exhaust fumes and or/explosive propane gas
fumes to be in the living area and/or below deck.
Publication No. 625352C (06-07-07)
© 2004 THETFORD/NORCOLD. All rights reserved.

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Summary of Contents for Norcold N109X Series

  • Page 1 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 intake and exhaust ventilation for correct and safe operation. Any other ventilation could cause lethal combustion exhaust fumes and or/explosive propane gas fumes to be in the living area and/or below deck.

  • Page 2: Table Of Contents

    tabLE Of CONtENtS Ice Maker aC Power Cord ......30 INtRODuCtION ............3 12 Vdc Ventilation Fan ............30 About this Manual ............... 3 COOLING uNIt ............31 Model Identification and Information Label ......3 Description ................ 31 Cooling Unit Serial Number ..........3 heat absorption ..........

  • Page 3: Introduction

    ® this publication are based on the latest product information for safety, reliability, and performance. The use of available at the time of publication. Norcold reserves the ® unauthorized aftermarket or generic replacement parts right to make changes at any time without notice.

  • Page 4: Safety Awareness

    SafEty awaRENESS Safety Notice appears on all safety labels posted on the refrigerator and safety awareness notices presented throughout this It is not possible to anticipate all of the conceivable manual. ways or conditions under which the refrigerator may be serviced or to provide cautions as to all of the possible hazards that may result.

  • Page 5: Specifications

    SPECIfICatIONS N109X Models Storage volume N109X -------------------------------------------------------------------------------------------------------------------------------- 9.5 ft Rough opening dimensions (H x W x D) N109X ------------------------------------------------------------------------------------------------------- 59 in. x 23 in. x 24 7 /8 1 /2 Decorative panels dimensions Thickness ---------------------------------------------------------------------------------------------------------------------------- 3 /16 Freezer door (H x W) ----------------------------------------------------------------------------------------- 14 in.

  • Page 6: Troubleshooting - Quick Reference Guide

    tROubLEShOOtING – QuICk REfERENCE GuIDE Problem Possible Cause Checks/Reference No 12 volt DC power to refrigerator. See page 7. The refrigerator does not turn ON. Faulty/loose 12 volt DC connections. Check 12 volt DC connections. F1 fuse in power board open. Check fuse F1 (5 amp) in power board.

  • Page 7: N109X Displayed Fault Codes

    N109X DISPLayED fauLt CODES Probable Cause Reference Code Refrigerator turned off. Blank No 12 Vdc to refrigerator. Display See page 7. Screen F1 fuse open. The burner failed to ignite or reignite. See page 8. Flame sense circuit failure. See page 9. DC voltage low.

  • Page 8: Troubleshooting Flowcharts

    tROubLEShOOtING fLOwChaRtS blank Display – Refrigerator does not turn on Before beginning this procedure make sure: The RV DC power system is supplying 10.5 to 15.4 volts to the refrigerator. ■ No other RV appliances or lighting circuits are connected to the refrigerator dc circuit. ■...

  • Page 9: No Fl Fault Code - Burner Failed To Ignite Or Reignite

    no fL fault Code – Burner failed to ignite or reignite Before beginning this procedure make sure: RV LP gas tank valve is open. ■ Refrigerator solenoid gas valve manual shutoff is open. ■ LP gas pressure at the solenoid gas valve pressure tap is 10.5. to 11.5 in. w. c. ■...

  • Page 10: Sr Fault Code - Flame Sense Circuit Failure

    Sr fault Code – Flame sense circuit failure Fault indicator displayed: 1-COLD COLDEST-9 MODE TEMP ON-OFF Flame sense circuit failure. Replace power board. See page 38. dc LO fault Code – Low dc voltage Before beginning this procedure: Make sure RV DC voltage to refrigerator is 10.5 to 15.4 volts. ■...

  • Page 11: Dc Hi Fault Code - Dc Voltage High

    dc hI fault Code – DC voltage high Before beginning this procedure: Make sure RV DC voltage to refrigerator is 10.5 to 15.4 volts. Determine if the "dc HI" fault code displays when the converter is the source of DC power. Fault indicator displayed: 1-COLD COLDEST-9 MODE...

  • Page 12: No Ac Fault Code - No Ac Power Available

    no aC fault Code – No AC power available Before beginning this procedure make sure: No other problems exist with the RV AC power supply. No other appliances or lighting circuits are connected to the refrigerator AC circuit. Extension cords are not being used to supply AC power to the refrigerator. Fault indicator displayed: 1-COLD COLDEST-9 MODE...

  • Page 13: Ac Lo Fault Code - Ac Voltage Low

    aC LO fault Code – AC voltage low Before beginning this procedure: Determine if a certain AC power source sets the "AC” “LO" fault code (generator, shore power, inverter). ■ Make sure no other appliance or lighting circuit is connected to the refrigerator AC circuit. ■...

  • Page 14: Ac He Fault Code - Ac Heater Failed Open

    aC hE fault Code – AC heater failed open Before beginning this procedure make sure: RV AC voltage to the refrigerator is 108 to 132 volts. No other appliance or lighting circuit is connected to the refrigerator AC circuit. Fault indicator displayed: 1-COLD COLDEST-9 TEMP MODE...

  • Page 15: Dr Fault Code - Door Open For More Than 2 Minutes

    dr fault Code – Door open for more than 2 minutes Before beginning this procedure make sure: Light/thermistor connector and wire harness connector are fully engaged and locked. ■ Fault indicator displayed: 1-COLD COLDEST-9 TEMP MODE ON-OFF Check that the door latch striker plate is adjusted correctly.

  • Page 16: N109X Backup Operation

    thermistor failure fault – Controls in Backup Operating System mode Before beginning this procedure: Make sure lamp/thermistor assembly is connected to the wire harness. ■ Fault indicator displayed: 1-COLD COLDEST-9 MODE TEMP ON-OFF T e mp Setting Flashing Check lamp/thermistor wire assembly and connector for dirty/broken connections.

  • Page 17: No Co Fault Code - No Cooling Detected By The Controls

    no co fault Code* – No cooling detected by the controls Fault indicator displayed: 1-COLD COLDEST-9 MODE TEMP ON-OFF Check for cooling at fin assembly. 1. Check for ventilation obstructions and leveled operation. Cooling 2. Reset power board as shown in detected? Figure 9 and described in procedure below.

  • Page 18: Ventilation

    VENtILatION Roof Exhaust Venting The space between the air intake vent and the rear of the refrigerator must be kept clear at all times. Any NOtE obstruction in this area may cause serious ventilation problems. The air intake vent opening also provides The general guidelines for intake vents and access for servicing cooling unit components.

  • Page 19: Baffles

    Top baffle required when the clearance from the cealing to the top of the refrigerator exceeds 1/4 inch. Condenser Vertical baffle Do not remove! Side wall baffles required when the clearance between the enclosure side walls and refrigerator exceeds 1/8 inch. Absorber coils Intake vent figure 11.

  • Page 20: Double Sidewall Venting

    Because of increased installation of refrigerators in Two baffles are required for the N109X model in double RV slide outs, NORCOLD has developed venting sidewall venting applications. It should be noted that guidelines for double sidewall vent applications. This baffle arrangements are different if the enclosure ensures NORCOLD refrigerators meet the ANSI Z21.19...
  • Page 21 Aluminum or galvanized steel sheet full width baffle New location of baffle .25 in. below condenser to 1.50 in. above bottom of condenser. For optimum performance, locate baffle .25 in below condenser. Aluminum or galvanized steel sheet full width baffle Old location 62 in.

  • Page 22: N109X

    Aluminum or galvanized steel sheet full width baffle. New location of solid baffle .25 in. below condenser to 1.50 in. above bottom of condenser. For optimum performance, locate baffle .25 in below condenser. Aluminum, wood, or galvanized steel sheet full width baffle. Old location Figure 14.

  • Page 23: Lp Gas System

    LP GaS SyStEM Canister Flue tube DC power connections Flue baffle Gas valve Burner tube Gas inlet fitting Electrode Burner LP16 orifice assembly Gas outlet fitting Burner box base Pressure Manual shut-off test port (shown closed) LP gas supply figure 15. LP gas system components Pressure Requirements testing for LP Gas Leaks WARNING...

  • Page 24: Components

    Components 12 volt DC power connections Mounting bracket WARNING : When working on the refrigerator LP gas system: Solenoid Do not alter or modify the burner tube anti- vibration loop. Gas inlet fitting Do not cross thread fittings. Exercise extreme (from RV LP gas) system) care when connecting and disconnecting fittings.

  • Page 25: Flue & Flue Baffle

    flue The flue comes equipped with a removable baffle and a metal heat deflector cap. The flue on the N109X model ends a few inches above the canister. See Figure 19. Heat deflector The flue, along with the baffle, should be checked annually.

  • Page 26: Burner Cleaning Procedure

    burner Cleaning Procedure WARNING WARNING Do not insert any type of cleaning tool or wire into Burn hazard! Allow the burner box and burner the orifice. Do not drill or ream the orifice opening components to cool before attempting to service the to clean it.
  • Page 27 Drip cup Burner box cover Solenoid gas valve manual shut-off figure 22. Gas valve manual shut off, drip cup and burner box cover Canister Flue Baffle Electrode Burner Orifice adapter with LP16 orifice figure 23. burner and components Refrigerator Service Manual N109X Models...

  • Page 28: Electrical Requirements And Components

    ELECtRICaL REQuIREMENtS aND COMPONENtS DC Voltage Requirements and Polarity Lamp assembly The operating controls require 10.5 to 15.4 volt DC to As shown in Figure 24, the light assembly harness and operate. The positive wire lead (+) connects to power thermistor share a four terminal modular connector.

  • Page 29: Ac Power Requirements

    AC Power Requirements When replacing the AC heater make sure the stop bead WARNING rests fully against heater tube rim. Figure 25 shows the location of the stop bead. Electric shock hazard! The refrigerator receives aC heater Circuit fuse power from more than one source. Unplug the ac The AC circuit fuse is a fast acting 5 amp "...

  • Page 30: Ice Maker Ac Power Cord

    12 Vdc Ventilation fan Ice Maker aC Power Cord The ventilation fan is located on top of the absorber The ice maker is supplied ac power through a separate coils on the back of the refrigerator. It is secured to the white ac power cord.

  • Page 31: Cooling Unit

    COOLING uNIt Description Gradual Decrease in Cooling Efficiency The cooling unit is a self-contained gravity flow A gradual decrease in cooling efficiency can be caused absorption refrigeration system. The refrigerant is a by the following factors: solution of water, ammonia, sodium hydroxide, and Ventilation restricted or obstructed.

  • Page 32: Resetting The Power Board

    Vertical Baffle Cooling unit Monitoring Control Operation The vertical baffle (see Figure 30) extends from the top The Cooling Unit Monitoring Control operates in the of the flue tube to the condenser. The purpose of this following sequence: baffle is to direct flue exhaust away from the condenser. 1.

  • Page 33: Cooling System Diagnostic Flowchart

    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. WARNING Do not operate the refrigerator if the Check cooling unit. cooling unit is leaking or a leak is suspected.
  • Page 34 WARNING Do not operate the refrigerator if From page 33. the cooling unit is leaking or a leak is suspected. Check condition of door gaskets. Repair/replace door as Door gaskets required. sealing properly? Recheck cooling unit for leaks. Visual and audible signs of leaks: Any signs of Replace cooling unit.

  • Page 35: Replacing The Cooling Unit

    Replacing the Cooling unit Cabinet Freezer plate Fin assembly Condenser Foam block Vertical Baffle Absorber Canister door Heat deflector Combustion seal Leveling chamber Canister AC heater Burner box Burner box window figure 31. Cooling, cabinet and components. NOtE This procedure supplements the instructions packaged with N109X model replacement cooling unit.

  • Page 36: Removal Of Cooling Unit

    CAUTION : 1. Remove the fan, bracket assembly, thermostat, and wiring from the cooling unit. Use only the NORCOLD approved sealant that is 2. Remove the drip cup retaining screw, then remove packaged with the new cooling unit. Do not use the cup.
  • Page 37 N109XIM (ice maker) a. Reinstall the ice maker water valve. b. Reconnect the ice maker water line. c. Install the condenser retaining screws. d. Connect the brown and the white wires to the water valve solenoid terminals. 14. Install the spark/sense electrode assembly. Set electrode-to-burner air gap 1/8 to 3/16 inch.
  • Page 38 figure 32a – for S/N or lower figure 32b – for S/N or higher • Use the included loop clamp, round spacer and self-drilling screw to secure the condenser to the • Use the two screw tabs at each side of the condenser. cabinet.

  • Page 39: Reinstallation Of Refrigerator Into Enclosure

    Reinstallation of Refrigerator into Enclosure WARNING Fresh food Fresh food compartment compartment door Do not install the refrigerator if the combustion seal has been damaged. A damaged combustion seal must be replaced. The seal isolates the living area of the vehicle from exhaust gases generated by LP gas combustion.

  • Page 40: Electronic Components

    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"...

  • Page 41: Power Board Controls

    CONtROLS TEMP SET Switch Power Switch ■ Press momentarily to view temperature setting. ■ Press momentarily to turn ON refrigerator. ■ Press and hold to select a temperature setting. ■ Press and release after three seconds to ■ Settings: 1= cold/9= coldest. turn OFF refrigerator.

  • Page 42: Modes Of Operation

    Modes of Operation autO Shift from autO LP GaS to autO aC In AUTO mode, ac power is the first heat energy source In AUTO mode, the controls shift automatically from selected by the controls. If ac power is not present, the AUTO LP GAS to AUTO AC any time the controls sense controls shift to LP gas (propane), the second priority that ac power is available.

  • Page 43: Ac Manual Mode

    aC Manual Mode LP Manual Mode In the AC Manual mode, ac power is the only heat In the LP Manual Mode, LP gas is the only heat energy energy source selected by the controls. When AC source selected by the controls. When the controls shift Manual Mode is selected: to LPManual mode: 1.

  • Page 44: Diagnostic Mode

    DIaGNOStIC MODE Display 1-COLD COLDEST-9 MODE TEMP ON-OFF figure 40. Model N109X optical control assembly Diagnostic Mode The Diagnostic Mode uses ten diagnostic channels, accessing the Diagnostic Mode commonly known as "screens," to display "live" inputs, To access the Diagnostic Mode: outputs, and fault history.

  • Page 45: Screens And Diagnostic Segments Information

    Screens and Diagnostic Segments Information Screen Stored fault history Screen Diagnostic Mode active Screen 1 confirms that the Diagnostic Mode is active. A Screen 4 displays stored fault history using lighted LED segments. The illustration provides fault history few seconds after the screen number appears, all LED segments light.
  • Page 46 Screen Power board Inputs Screen Power board DC Voltage Status Screen 7 displays "live" power board inputs using lighted Screen 9 displays dc voltage status using lighted LED LED segments. The illustration below provides "live" segments. The illustration below provides dc voltage inputs information and assigned LED segments.

  • Page 47: Wiring Pictorials And Diagrams

    wIRING PICtORIaLS aND DIaGRaMS figure 42. N109X wiring pictorial. Display overlay 5 amp fuse 16 Water line heater (ice maker models) Display board 10 Spark electrode 17 Thermostat (ice maker Divider heater 11 12 VDC connection models) Thermistor / light assembly 12 Gas valve 18 Fan 120 VAC power cord...
  • Page 48 figure 44. Ice maker wiring diagram figure 45. Ice maker wiring pictorial 120 Vac hot Neutral/ribbed Solenoid water valve PC board Ground screw Thermal fuse Hot/smooth Ice maker Refrigerator Service Manual N109X Models...

  • Page 49: Ice Maker Components And Service

    ICE MakER COMPONENtS aND SERVICE The ice maker is a factory installed accessory located on the right side of the 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.

  • Page 50: Water Fill Tube & Line

    water fill tube Fill tube The water fill tube connects the water fill line to the ice maker. It penetrates into the freezer cabinet from the rear of the refrigerator. This tube is factory installed and sealed and should not be disturbed or removed; it cannot be replaced.

  • Page 51: Water Valve Replacement Procedure

    water Valve to install a replacement solenoid water valve: The water valve, see Figure 48, is solenoid operated. 1. Install the replacement water valve/bracket This valve is located on the back of the cabinet on assembly on the refrigerator. Use screws and the bottom of the refrigerator The solenoid is supplied spacers previously removed.

  • Page 52: Water Valve Service

    Ice Maker troubleshooting Chart Problem Probable Causes Remedy A. No ac power to ice maker A. Check ac power supply. B. No water available to water valve. B. Check water supply to valve. No ice in mold/ no ice yield. C.

  • Page 53: Replacing Ice Maker

    Replacing Ice Maker Removal of existing ice maker: NOtE 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. 1.

  • Page 54: Cycle Testing Ice Maker

    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. Shut off the water supply to the ice maker water valve. 2.

  • Page 55: Checking Water Valve Solenoid Resistance

    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 55. 185W–115V– 60 HZ CAUTION 01/13/03 Do not turn the water fill adjustment screw over one turn.
  • Page 56 Publication No. 625352b (06-07-07) NORCOLD CuStOMER SERVICE telephone ........1-800-444-7210 NORCOLD® fax ..........937-497-3183 P. O. Box 4248 world wide web .... www. norcold.com/cda Sidney, OH 45365-4248 Refrigerator Service Manual N109X Models...

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N109xim series

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