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Norcold NX61, Service Manual

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DO NOT install this refrigerator in below deck marine applications. Do not 

install this refrigerator in 

fi

 xed 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. 636104B (27.01.2015)

© 2013 NORCOLD, INC.  All rights reserved.

Service Manual

!

WARNING

Gas / Electric Refrigerators

MODELS

NX61 / NX81

NX64 / NX84

NX64XIM / NX84XIM

NX64.3 / NX84.3

Questions?/Des questions?/¿Preguntas? 1-800-543-1219

NXA64 / NXA84

NXA64XIM / NXA84XIM

NXA64.3 / NXA84.3

Summary of Contents for NX61

Page 1: ...tion 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 63610...

Page 2: ...tic Segments Information 27 Ventilation 29 Roof Exhaust Venting 29 Air Intake Vent 29 Roof Exhaust Vent 29 Baffles 30 Vertical Enclosures 31 Double Sidewall Venting 35 Double Side Wall Venting 36 LP G...

Page 3: ...g 28 Burner and Components 43 Fig 29 DC Heater 45 Fig 30 AC and DC Heaters 3 way refrigerator 46 Fig 31 Lamp Thermistor Assembly 46 Fig 32 AC Heater 46 Fig 33 AC Power Cord 47 Fig 34 Fan Mounted on To...

Page 4: ...r LP gas propane pressure Btu h AC voltage and amperage DC voltage and amperage Design certification Vent kit requirement INTRODUCTION Certification and Code Requirements NORCOLD NX6X NX8X NXA6X NXA8X...

Page 5: ...Pewter Royce wrapped 9 Fan Blank No fan F Equipped 1 Fan F2 Equipped 2 Fans V Equipped 1 High Velocity Fan 10 Door swing L Left hand door swing R Right hand door swing 11 P Black acrylic door panels...

Page 6: ...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 sod...

Page 7: ...partment HxW NX61 NX64 NXA64 32 25 32 in x 21 19 32 in NX81 NX84 NXA84 39 25 32 in x 21 19 32 in DC power DC input voltage requirements 10 5VDC to 15 4VDC DC Fuse F1 on Power Board Automotive Blade Ty...

Page 8: ...sulation interfering with the ventilation process Construction material or debris left in the enclosure Insect screen covering vents Plastic sheeting covering vents Items stored in the enclosure Modif...

Page 9: ...with the existing weak solution WS The ammonia vapor AV rises and enters the condenser where it condenses liquefies into pure liquid ammonia LA The liquid ammonia via gravity drops into the tubular c...

Page 10: ...optical display then relays this information to the power board that then turns on off the appropriate heat source accordingly The optical display board power board thermistor and other components wit...

Page 11: ...he high voltage transformer T1 are carried out to the burner via the spark sense electrode wire As the energy pulses reach the end of the electrode they jump across the gap between the electrode and t...

Page 12: ...rrent Turning ON OFF the gas valve output Turning ON OFF the igniter output Determining the presence of a flame Communicating with the Optical Display Board Communicating with the DC Board 3 way model...

Page 13: ...allowing the flame to extinguish If for some reason the flame goes away while there is a call for cooling the power board will turn the high voltage transformer back on and attempt to re ignite the p...

Page 14: ...ckup operating mode allowing the refrigerator to continue cooling until it can be serviced Temperature set points and BOS duty cycles for each model are as follows NX61 NX81 MODELS Temperature Setting...

Page 15: ...asses through the now closed K3 contacts to terminal P1 5 of the power board The DC ground connection terminal GND is electrically tied to power board terminal P1 3 This auxiliary output will be prese...

Page 16: ...on The glass 8 amp fuse F2 on the Power Board is intact Replace Power Board Manual LP Mode A flame was NOT established or a flame was NOT sensed Verify All LP gas shutoff valves including manual shuto...

Page 17: ...ld this fault continue to be displayed after being reset the Power Board should be replaced This fault can be displayed in ANY MODE NORCOLD A MODE COLD COLDEST Power ON indicator light flashes ON thre...

Page 18: ...e then falls below 10 0 VDC the gas valve will remain energized and no fault will be displayed This fault can only be displayed in the Auto and Manual LP modes Verify That the battery charging equipme...

Page 19: ...beneath the refrigerator doors top trim piece When the magnet is close to the reed switch door closed the light remains off when the magnet is away from the reed switch door open the light is turned...

Page 20: ...lts and is used to power ON the display Note The On Off switch E is a momentary push button switch The operation described above takes place during the split second the On Off button is depressed to p...

Page 21: ...3 P1 ON OFF Exaggerated view Vreg 1 2 3 4 5 P2 P1 U1 K2 K5 K4 K3 K1 YL GN JN VE GN VE BK NR WH RD BC RG WH VT BC VT GN VE WH BC POWER BOARD DISPLAY BOARD A C D E B 12VDC VCD BAT POS BU BL 12VDC VCD BA...

Page 22: ...ode to burner air gap is between 1 8 and 3 16 The spark sense igniter wire is installed correctly and in good operating condition NX64 NX84 NXA64 NXA84 Fault Codes Meaning This fault is a combination...

Page 23: ...present when there should not be This fault can be displayed in ANY MODE Replace the gas valve Meaning The Power Board detected an internal fault This fault can be reset by powering the refrigerator O...

Page 24: ...DC All outputs are inhibited This fault will automatically reset and outputs will be allowed to operate once the DC input voltage rises above 9 0 VDC above 10 5 for 3 way models This fault can be dis...

Page 25: ...ermistor to be inoperable This fault is only displayed while the optical display is awake To wake the display press and release either the Mode or Temp Set buttons If there is a problem sensed with th...

Page 26: ...ber and diagnostic information Information made up of four letters or digits displays in an alternating sequence Fault history live inputs and outputs is presented using LED segments The diagnostic LE...

Page 27: ...3 Initial View Diagnostic Screen 3 Second View NOR000125A 3 Screen 4 Stored Fault History Screen 4 displays stored fault history using lighted LED segments Refer to illustration below for fault histo...

Page 28: ...s using lighted LED segments The following illustration provides definitions of the live outputs indicated by the individual LED segments If a power board output is active or live its assigned output...

Page 29: ...haust vent with four screws The cap is always installed with the slope towards the front of the RV Air Intake Vent The ventilation and combustion air flow into the enclosure through the air intake ven...

Page 30: ...ing unit and the interior surface of the outside wall exceeds one inch Fig 11 Rear View Roof Exhaust Venting Fig 12 Baffles Required for an Inboard Roof Exhaust Vent Installation Intake vent Condenser...

Page 31: ...6 0 in ma x R E F R efrigerator heightoverall w trim N6XX 54 5 in N8XX 61 5 in N109X 59 7 in R efrigerator width overall w trim N6XX 24 6 in N8XX 24 6 in N109X 24 8 in NOR000118B R efrigerator width o...

Page 32: ...bottom of enclosure 18 18 50 in 622293 R oof exhaustcap and 616319 R oof exhaustvent Distance between box baffle an d condenser must be 1 in or less Distance between baffle an d top of refrigerator m...

Page 33: ...RE F N8XX and N109X 55 7 in min 56 0 in max R E F R efrigerator height overall w trim N6XX 54 5 in N8XX 61 5 in N109X 59 7 in R efrigerator width overall w trim N6XX 24 6 in N8XX 24 6 in N109X 24 8 i...

Page 34: ...tca p and 616139 R oof exhaust vent Distance between box baffle and condenser must be 1 in or less Distance between baffle an d top of refrigerator mus t be less than 25 in Baffles must be 45 or less...

Page 35: ...nting guidelines for double sidewall vent applications This work was done to ensure NORCOLD refrigerators meet the ANSI Z21 19 standards for cooling performance when used in slide out applications The...

Page 36: ...ame Fa n E nclosure depths of more than 24 in and less than 26 in Minimum distance between the bottom of the enclosure and the top of the upper vent opening N6XX m odels 55 in N8XX and N109X models 62...

Page 37: ...mo dels 62 in 621156 Vent 13 75 high x 21 50 wide rough opening R O Center vent R O in enclosure width E nclosure widths N6XX 23 50 23 63 in N8XX 23 50 23 63 in N109X 23 50 23 63 in En closure height...

Page 38: ...assembly LP15 orifice shown Electrode Canister Burner Flue tube Baffle Burner tube Burner box base RV LP gas supply Gas valve Gas inlet fitting Gas outlet fitting Manual shut off shown closed WARNING...

Page 39: ...er servicing replacing or repairing any LP gas system component Solenoid Gas Valves The manual shut off valve and the pressure tap are integrated into the solenoid gas valve To manually shut off gas t...

Page 40: ...f the three openings will have an effect on the fuel air mixture Insufficient combustion air will cause carbon deposits to clog the burner slots Carbon clogged burner slots along with heavy dirt depos...

Page 41: ...ce may be affected if the heat deflector is not installed or is not installed correctly Spiral Baffle The spiral baffle traps and transfers heat to the cooling unit generator See Fig 24 A retaining wi...

Page 42: ...ondition of the orifice assembly is questionable 12 Clean any accumulation of dirt or debris from the burner box base 13 Reinstall the burner Do not over tighten the burner s retaining screw 14 Instal...

Page 43: ...ervice Manual Burner tube Electrode Canister Burner Flue Baffle Orifice adapter with LP15 orifice Fig 27 Drip Cup and Burner Box Cover LP Gas System cont d NOR000091A Solenoid gas valve manual shut of...

Page 44: ...in Gas Supply Lines Gas valve and igniter outputs will be turned off LP Gas mode will be locked out Fault code displayed on the optical display NX61 NX81 Power ON indicator is SOLID RED NX64 NX84 NXA...

Page 45: ...color automotive blade type fuse It is located on the power board labeled F1 DC Heater 3 Way Refrigerators Only The DC heater shown in Fig 29 is a cartridge type heater The DC heater is rated for 280...

Page 46: ...istance of 46 to 51 ohms AC Power Requirements AUTO AC and AC Manual Mode operation requires 108 to 132 VAC AC power must be supplied through a 2 pole 3 wire 20 amp grounding type receptacle AC Heater...

Page 47: ...talled 12VDC ventilation fan All sidewall vented units must be equipped with a ventilation fan to prevent combustion gases and hot ventilation air from stagnating in the enclosure Ventilation fans are...

Page 48: ...tch opens the electronic controls will disable ALL heat source outputs and the Open High Limit error fault code will be displayed on the optical display Refer to Fault Code sections Reset the thermal...

Page 49: ...vices for guidance Poor or No Cooling on DC Mode 3 Way Models Troubleshooting Cooling Faults A high percentage of cooling units returned labeled faulty are fully operational units To troubleshoot cool...

Page 50: ...Reset Thermal Switch and monitor carefully for normal operation Refrigerator operating leveled Ventilation as per installation instructions Is Cooling Unit equipped with high temp thermal switch YES...

Page 51: ...correct ventilation and operation at coldest setting for a period of 8 12 hours Freezer 5 F to 10 F Fin temperature 18 F to 25 F Door gaskets sealing properly Refrigerator temperatures normal Visual...

Page 52: ...G B U B L WH VT BC VT GN VE WH BC RD RG RD RG BK NR BK NR 120VCA 120VAC BATTERY ACCUMULATEUR POWER BOARD BEST DISPLAY BOARD MEILLEUR CARTE D AFFICHAGE BETTER DISPLAY BOARD MIEUX CARTE D AFFICHAGE N N...

Page 53: ...30 AMP F1 K M L1 L2 P1 5 POWER BOARD 4 P2 T1 5 AMP AC_HT_HI_2 LIMIT_IN LIMIT_OUT AC_HT_LO AC_HT_HI AC_HT_LO_2 GND 12VDC 10 7 6 1 10 1 3 2 5 1 1 1 2 3 6 1 8 AMP F2 F1 DISPLAY BOARD B A N L F D C I J H...

Page 54: ...icable mode indicator s 277 278 and 279 will come on Select one of three 3 modes of operation Mode Meaning AUTO mode The refrigerator s electronic control automatically select the most efficient energ...

Page 55: ...C electric 285 Manual mode AC electric 283 Manual mode gas 284 Manual mode DC electric 286 AUTO mode The refrigerator s electronic controls automatically select the most efficient energy source that i...

Page 56: ...rigerator is operating in Auto mode and is using AC electric as the power source Green POWER ON indicator is on AUTO indicator is on GAS indicator is on The refrigerator is operating in Auto mode and...

Page 57: ...rminal White neutral N The insulated male quick connect terminal is the 120 VAC neutral N conductor Brown supplies 120 VAC power to the water valve solenoid during the fill cycle It connects to water...

Page 58: ...et strainer D Test water valve operation refer to page 60 Ice Maker Troubleshooting Chart Fig 46 Ice Maker Mounting Hardware Replacing the Ice Maker To remove the existing ice maker see Fig 46 1 Unplu...

Page 59: ...ly after hearing the click sound or 15 seconds after shorting terminals T and H Failing remove jumper wire will cause damage to the heater and or overheat the mold which will ruin the ice maker NOTE D...

Page 60: ...should be in the center of the module housing hole alignment indicator With the hole centered the water valve should remain open approximately 7 5 seconds Low Ice Yield The thermostat initiates the c...

Page 61: ...the off position 3 Disconnect the garden hose adapter from the water valve 4 Disconnect the ice maker water supply line from the water valve Do not unwrap the water line heater wire from the water va...

Page 62: ...mal Fuse Thermal Fuse L Mold Heater H Switch Shut off arm Thermostat NC NO OFF T N White NC NC NO NO Brown Solenoid water valve V Fill switch Motor switch M Motor Ground Green Black Fig 54 NX64IM NX84...

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