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Norcold N61X, N62X, N64X, N64X.3, N81X User Manual

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Service Manual
Gas/Electric Refrigerators
MODELS
N61X/N81X
N62X/N82X
N64X/N84X
N64XIM/N84XIM
N64X.3/N84X.3
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. 619394E (01-28-04)

TABLE OF CONTENTS

Introduction------------------------------------------------------ 1
About this Manual ................................................................. 1
Model Identification............................................................... 1
Information Label .................................................................. 1
Cooling Unit Serial Number .................................................. 1
Certification and Code Requirements ..................................1
About Installation .................................................................. 1
Replacement Parts ............................................................... 1
Technical Assistance.............................................................1
Safety Awareness --------------------------------------------- 3
Safety Notice......................................................................... 3
Attention Statements............................................................. 3
Safety Statements................................................................. 3
Specifications--------------------------------------------------- 4
N61X/N81X Models .............................................................. 4
N62X/N82X Models .............................................................. 5
N64X/N64X.3/N84X/N84X.3 Models .................................... 6
Troubleshooting – Quick Reference Guide ----------- 7 N61X/N81X Displayed Fault Codes ---------------------- 8 N62X/N82X Displayed Fault Codes ---------------------- 9 N64X/N84X Displayed Fault Codes --------------------- 10 Troubleshooting Flowcharts ------------------------------11
Blank Display – Refrigerator does not turn on ................... 11
F/no FL Fault Code – Burner failed to ignite or reignite..... 12
S/Sr Fault Code – Flame sense circuit failure.................... 13
dc LO Fault Code – Low DC voltage .................................. 13
dc HI Fault Code – DC voltage high................................... 14
dc rE Fault Code – DC relay stuck closed .........................14
dc HE Fault Code – DC heater failed open........................ 15
A/no AC Fault Code – No AC power available ................... 16
r/AC rE Fault Code – AC relay stuck closed ...................... 16
AC HI Fault Code – AC voltage high.................................. 17
AC LO Fault Code – AC voltage low .................................. 17
H/AC HE Fault Code – AC heater failed open ................... 18
Food Compartment Lamp Switch ....................................... 19
Lamp Switch Operation.....................................................19
d/dr Fault Code – Door open for more than 2 minutes ...... 19
Lamp Switch Testing Procedure ....................................... 19 Thermistor Failure Fault – Controls in backup operating
system mode....................................................................... 20
Backup Operating System (BOS)....................................... 20
N61X/N81X Backup Operation. ........................................ 20
N62X/N82XN64X/N84X Backup Operation...................... 20
Power Board Resetting Procedure ..................................... 21 n/no co Fault Code – No cooling detected by the controls 21
Ventilation -------------------------------------------------------22
Roof Exhaust Venting ......................................................... 22
Air Intake Vent..................................................................... 22
Roof Exhaust Vent .............................................................. 22
Baffles ................................................................................. 23
Vertical Angled Baffles ...................................................... 23
Double Sidewall Venting..................................................... 24
Air Intake Vent................................................................... 24
Sidewall Exhaust Vent ...................................................... 24
LP Gas System ------------------------------------------------27
Pressure Requirements ...................................................... 27
Testing for LP Gas Leaks ...................................................27
Components........................................................................ 28
Solenoid Gas Valves ......................................................... 28
New Style Solenoid Gas Valve .........................................28
Old Style Solenoid Gas Valve ........................................... 28
Solenoid Gas Valve Connections .....................................28
Orifice ................................................................................29
Burner................................................................................29
Burner Tube ...................................................................... 29
Flue ................................................................................... 30
Heat Deflector ................................................................... 30
Flue Baffle ......................................................................... 30
Flame Appearance..............................................................30
Burner Cleaning Procedure ................................................ 31
Electrical Requirements and Components-----------33
DC Voltage Requirements and Polarity..............................33
Power Board DC Fuse ...................................................... 33
DC Power Wiring Requirements......................................... 33
2-Way Models ................................................................... 33
3-Way Models ................................................................... 33
AC/DC Converter as Power Source ................................... 33
DC Heater–3-Way Refrigerators Only .............................. 33
DC Heater Circuit Fuse..................................................... 33
Lamp Assembly................................................................. 34
Divider Heater ................................................................... 34
AC Heater .........................................................................34
AC Power Requirements .................................................... 34
AC Heater Fuse ................................................................34
AC Power Cord ................................................................. 35
Power Cord for Ice Maker Units........................................35
12 Vdc Ventilation Fan........................................................35
Cooling Unit ----------------------------------------------------37
Description .......................................................................... 37
Heat Absorption ................................................................ 37
Leveled Operation............................................................. 37
Gradual Decrease in Cooling Efficiency............................. 37
Cooling System Monitoring.................................................37
First "No Cooling" Fault Occurrence.................................37
Two Recorded "No Cooling" Fault Occurrences .............. 37
Troubleshooting Cooling Faults..........................................38
Poor or No Cooling on AC Mode ...................................... 38
Poor or No Cooling on LP Gas Mode ............................... 38
Poor or No Cooling on DC Mode – 3-Way Models........... 38
Refrigerant Leakage ........................................................... 38
Disposal of Cooling Unit ..................................................... 38
Cooling System Diagnostic Flowchart................................ 39
Replacing the Cooling Unit ................................................. 41
Removing the Refrigerator from the Enclosure................ 41
Removal of Cooling Unit ................................................... 42
Installation of Replacement Cooling Unit ........................42
Reinstallation of Refrigerator into Enclosure .................... 44
Electronic Components ------------------------------------45
Power Board ....................................................................... 45
Removal–Power Board ..................................................... 45
Installation–Power Board ..................................................46
Optical Control Assembly ................................................... 46
N61X/N81X Wiring Schematic............................................47
N61X/N81X Wiring Pictorial................................................47 N62X/N82X/N64X/N84X/N64X.3/N84X.3 Wiring Pictorial –
Units with serial number 851759 and higher..................... 48 N62X/N82X/N64X/N84X/N64X.3/N84X.3 Wiring Schematic –
Units with serial number 851759 and higher..................... 48 N62X/N82X/N64X/N84X/N64X.3/N84X.3 Wiring Pictorial –
Units with serial number lower than 851759 ...................... 49 N62X/N82X/N64X/N84X/N64X.3/N84X.3 Wiring Schematic –
Units with serial number lower than 851759 ...................... 50
Controls----------------------------------------------------------51
N61X/N81X Optical Control Assembly ............................... 51
Front Box........................................................................... 51
Removal and Installation of Optical Control Assembly..... 51
Modes of Operation ............................................................ 52
Refrigerator Service Manual
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N6XX/N8XX Models
i
AUTO Mode ...................................................................... 52
No AC Power ..................................................................... 52
AC Power Restored ..........................................................52
No AC and No Flame........................................................ 52
GAS Mode......................................................................... 52
No Flame........................................................................... 52
Backup Operating System .................................................. 52
“Gas Lock-Out” ................................................................... 52
N62X/N82X Optical Control Assembly ............................... 53
Front Box........................................................................... 53
Removal and Installation of Optical Control Assembly..... 53
Modes of Operation ............................................................ 54
AUTO Mode ...................................................................... 54
AUTO AC Operation ......................................................... 54
AUTO LP Gas Operation .................................................. 54
Shift from AUTO LP GAS to AUTO AC ............................. 54
No AC Power and No Flame.............................................54
Troubleshooting a "F"/"no" "FL" and "A"/"no" "AC" Faults 54
AC-Manual Mode .............................................................. 54
LP Gas–Manual Mode ...................................................... 54
No AC Power or Loss of AC Power ..................................55
Troubleshooting a "A"/"no" "AC" Fault..............................55
AC Power Restored ..........................................................55
Flame Fails to Ignite or Flame Goes Out .........................55
Clearing "Gas Lock-Out"................................................... 55
Troubleshooting a "F"/"no" "FL" Fault...............................55
N64X/N84X Optical Control Assembly ............................... 56
Front Box........................................................................... 56
Removal and Installation of Optical Control Assembly..... 56
Modes of Operation ............................................................ 57
AUTO ................................................................................ 57
AUTO AC Operation ......................................................... 57
AUTO LP Operation.......................................................... 57
Shift from AUTO LP GAS to AUTO AC ............................. 57
No AC Power and No Flame............................................. 57
Shift from AUTO LP GAS to AUTO AC ............................. 57
Troubleshooting No Flame and No AC Faults.................. 57
AUTO DC Operation – 3-Way Units Only......................... 58
AC-Manual Mode ................................................................ 58
No AC Power or Loss of AC Power ..................................58
AC Power Restored ..........................................................58
Troubleshooting "no" "AC" Fault....................................... 58
LP-Manual Mode................................................................. 59
Flame Fails to Ignite or Flame Goes Out .........................59
DC-Manual Mode................................................................ 59
No DC Power to DC Heater Circuit .................................. 59
Diagnostic Mode — Models N62X/N82X --------------60
Diagnostic Mode ................................................................. 60
Accessing the Diagnostic Mode ....................................... 60
Changing Screens ............................................................60
Exiting the Diagnostic Mode ............................................. 60
Screens and Diagnostic Segments Information ............... 61
Diagnostic Mode — Models N64X/N84X --------------63
Diagnostic Mode ................................................................. 63
Accessing the Diagnostic Mode ....................................... 63
Changing Screens ............................................................63
Exiting the Diagnostic Mode ............................................. 63
Screens and Diagnostic Segments Information ................. 64
Ice Maker --------------------------------------------------------66
Wire Harness ...................................................................... 66
Fill Tube .............................................................................. 66
Water Valve......................................................................... 66
Specifications...................................................................... 66
Replacing the Ice maker..................................................... 67
Ice Maker Troubleshooting Chart ....................................... 67
Cycle Test ........................................................................... 68
Water Fill Adjustment .......................................................... 69
Low Ice Yield....................................................................... 69
Water Valve Operation Test ................................................ 69
Water Valve Solenoid Resistance ...................................... 69
Mold Heater Resistance Check .......................................... 70
Checking Voltage at Motor Terminals................................. 70
Winterizing the Ice Maker Water ........................................ 70 N64X IM/N84XIM – Wiring Pictorial for Ice Maker Wired to
Refrigerator AC Cord ..........................................................70 N64X IM/N84XIM – Wiring Schematic for Ice Maker Wired to
Refrigerator AC Cord ..........................................................70 N64X IM/N84XIM – Wiring Schematic for Ice Maker Wired to
White AC Power Cord......................................................... 72 N64X IM/N84XIM – Wiring Pictorial for Ice Maker Wired to
White AC Power Cord......................................................... 72
ii Refrigerator Service Manual www.norcold.com/cda N6XX/N8XX Models

INTRODUCTION

About this Manual
This service manual provides maintenance, diagnostic, and repair information for NORCOLD® models N6XX and N8XX (N6XX/N8XX) 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® reserves the right to make changes at any
time without notice.
Model Identification
Models N61X, N81X, N62X, N82X, N64X, and N84X are 2-way refrigerators that operate on AC power or LP gas.
Models N64X.3 and N84X.3 are 3-way refrigerators, that operate on AC power , LP gas, or DC power .
Letter(s) appended to the model number identify factory installed accessories. For example, an N821F is a 2-way refrigerator equipped with a factory installed 12 Vdc cooling unit ventilation fan; an N641IM is a 2­way refrigerator equipped with an ice maker.
Certification and Code Requirements
NORCOLD® N6XX/N8XX gas/electric absorption
refrigerators are certified under the latest edition of ANSI Z21.19B standards for installation in mobile homes or recreational vehicles, and with the Canadian Standards Association CAN/CGA-1.4-M94.
Electrical components are compliant.
About Installation
Refrigerator installation must conform with the N6XX/ N8XX Installation Manual for the NORCOLD® limited
warranty to be in effect. Installation must also comply with applicable local codes and standards set by the cognizant certification agency .
Replacement Parts
Use only authorized NORCOLD® replacement parts. Generic parts do not meet NORCOLD® specifications for safety , reliability , and performance. The use of unauthorized aftermarket or generic replacement parts voids the refrigerator's limited warranty coverage.
T echnical Assistance
If unable to resolve technical issues using the information provided in this manual, technical support is available through NORCOLD® Customer Service Center:
Information Label
The information label is located in the upper right corner of the fresh food compartment just below the divider. See Figure 1, p age 2. The label provides the following information:
n Serial number. n Model number. n LP gas (propane) pressure. n Btu/h. n AC voltage and amperage. n DC voltage and amperage. n Design certification. n Vent kit requirement.
Cooling Unit Serial Number
The cooling unit serial number 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.
' Telephone:.................................... 1-800-444-7210.
7 Fax:.............................................. 1-937-497-3183.
; World Wide Web: ......................www.norcold.com.
The following information is required to process technical support requests:
n Model number. n Serial number. n Make, model, and year of recreational vehicle.
www.norcold.com/cda 1N6XX/N8XX ModelsRefrigerator Service Manual
Figure 1. Refrigerator Information Label Location.
Figure 2. Cooling Unit Bar Code Label Location.
2
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Refrigerator Service ManualN6XX/N8XX Models
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 removal, such as when 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 Statements
Do not modify, alter, or equip the refrigerator to the
use of any other fuel (natural gas, butane, etc.). N6XX/ N8XX refrigerators are designed and equipped for the use of LP gas–propane gas–only.
Incorrect installation, adjustment, alteration, or
maintenance of the refrigerator can cause personal injury, property damage, or both.

SAFETY AW ARENESS

The safety alert symbol with the appropriate heading appear on all safety labels posted on the refrigerator and safety awareness notices presented throughout this manual.
!
WARNING:
The above heading identifies hazards or conditions, which if ignored can cause serious injury , death, and/ or extensive property damage.
!
CAUTION:
The above heading identifies hazards, which if ignored can cause injury and/or property damage.
Do not use leak test solutions that contain ammonia
or chlorine. Ammonia and chlorine degrade copper and brass components.
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.
Do not smoke, light fires, or create sparks when
working on the propane gas system.
Do not use an open flame for leak testing any of the
propane gas system components. Propane gas is highly flammable and explosive.
Always use two wrenches to tighten or loosen LP gas
connections. Damaged connections, piping, and components create the potential for gas leaks.
All electrical connections and repairs to the
refrigerator must comply with all applicable codes. Refer to the certification and code requirements section of the N6XX/N8XX Installation Manual.
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.
Do not modify, bypass, or eliminate any of the
refrigerator's electrical components, electronic circuits, or propane gas system components.
Do 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.
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.
Do 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.
Do not over-fuse electrical circuits. Use specified
fuses and AWG wire sizes. The specification section of this manual provides fuse size information. Refer to the N6XX/8XX Installation Manual for the correct AWG wire size specifications.
Prevent child entrapment! Before disposing of the
refrigerator, remove all doors and fasten all shelves with retainers.
Some 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.), are properly fastened.
www.norcold.com/cda 3N6XX/N8XX ModelsRefrigerator Service Manual

SPECIFICATIONS

N61X/N81X Models
Storage volume
N61X --------------------------------------------------------------------------------------------------------------------------------- 6.3 ft3. N81X --------------------------------------------------------------------------------------------------------------------------------- 7.5 ft
Rough opening dimensions (H x W x D) N61X ------------------------------------------------------------------------------------------------------ 52 N81X ----------------------------------------------------------------------------------------------------- 59
7
/8
in. x 23
7
/8
in. x 23
1/2
in. x 24 in.
1/2
in. x 24 in.
3
.
Decorative panels dimensions
3/16
Thickness--------------------------------------------------------------------------------------------------------------------------­Freezer door (H x W, both models)---------------------------------------------------------------------14
17/32
in. x 21
19/32
in.
in. Fresh food compartment (H x W) N61X ------------------------------------------------------------------------------------------------------------- 31 N81X ------------------------------------------------------------------------------------------------------------- 38
5/8
in. x 21
5/8
in. x 21
19/32 19/32
in. in.
Controls
Type ---------------------------------------------------------------------------------------------- Electronic with built-in diagnostics Mode selector switch ------------------------------------------------------------------------------------------ 3-position slide type T emperature switch--------------------------------------------------------------------------------------------- 5-position slide type Temperature settings ---------------------------------------------------------------------------------------------- 1=cold, 5=coldest T emperature sensor ----------------------------------------------------------------------------- Thermistor, fin mounted (10th fin)
Off-level operating limits
Side-to-side------------------------------------------------------------------------------------------------------- 3 degrees-maximum Front-to-back----------------------------------------------------------------------------------------------------- 6 degrees-maximum
DC power
Controls operating voltage ----------------------------------------------------------------------------------------- 10.5 t o 15.4 Vdc Fuse, control circuit (F1 in power board) -------------------------------------------- 5 A (tan color), automotive blade type Fuse, fan (N6XXF/N8XX F models with an in-line fuse)--------------------- 1 A,
1
/4
in. x 1
1
in. AGC type fast acting
/4
DC amperage draws (at nominal 12 Vdc) Automatic ignition----------------------------------------------------------------------------------------------------------------- 0.50 A Divider heater ---------------------------------------------------------------------------------------------------------------------- 0.25 A Fresh food compartment lamp ------------------------------------------------------------------------------------------------- 0.46 A Gas valve--------------------------------------------------------------------------------------------------------------------------- 0.146 A Fan (N6XX/FN8XXF models only)---------------------------------------------------------------------------------------------- 0.36 A
AC power
AC heater operating voltage ----------------------------------------------------------------------------------------- 108 to 132 Vac Fuse, AC heater circuit (F3 in power board)---------------------------------- 5 A,
1
/4
in. x 1
1
in. AGC type fast acting
/4
AC heater rating ------------------------------------------------------------------ 300 W/2.5 A @ 120 Vac (resistance of 48Ω)
LP gas (propane)
Operating pressure ---------------------------------------------------------------------------------------------- 10.5 to 11.5 in. w.c. Heat output--------------------------------------------------------------------------------------------------1500 Btu/h @ 11 in. w .c. Orifice ---------------------------------------------------------------------------------------------------------------------------------- LP16 Gas ignition---------------------------------------------------------------------------------- Automatic with flame sensing circuit Electrode tip-to-burner air gap---------------------------------------------------------------------------------------- 1/8 to 3/16 in.
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Refrigerator Service ManualN6XX/N8XX Models
N62X/N82X Models
Storage volume
N62X --------------------------------------------------------------------------------------------------------------------------------- 6.3 ft3. N82X --------------------------------------------------------------------------------------------------------------------------------- 7.5 ft
Rough opening dimensions (H x W x D) N62X ------------------------------------------------------------------------------------------------------ 52 N82X ------------------------------------------------------------------------------------------------------ 59
7
/8 in. x 231/2 in. x 24 in.
7
/8
in. x 23
1
/2
in. x 24 in.
3
.
Decorative panels dimensions
3
Thickness--------------------------------------------------------------------------------------------------------------------------­Freezer door (H x W, both models)---------------------------------------------------------------------14
17/32
in. x 21
/16
19/32
in.
in. Fresh food compartment door N62X --------------------------------------------------------------------------------------------------------------31 N82X --------------------------------------------------------------------------------------------------------------38
5
/8
in. x 21
5
/8 in. x 2119/32 in.
19
/32
in.
Controls
Type --------------------------------------------------------------------------------------- Electronic with built-in diagnostic mode ON/OFF/MODE/TEMP SET switches ------------------------------------------------------------------------ Flush push-button Temperature settings ---------------------------------------------------------------------------------------------- 1=cold, 9=coldest T emperature sensor ----------------------------------------------------------------------------- Thermistor, fin mounted (10th fin)
Off-level operating limits
Side-to-side------------------------------------------------------------------------------------------------------- 3 degrees-maximum Front-to-back----------------------------------------------------------------------------------------------------- 6 degrees-maximum
DC power
Controls operating voltage ----------------------------------------------------------------------------------------- 10.5 to 15.4 Vdc Fuse, control circuit (F1 in power board) -------------------------------------------- 5 A (tan color), automotive blade type Fuse, fan (N6XXF/N8XX F models with in-line fuse) ------------------------- 1 A,
1
/4
in. x 1
1
in. AGC type fast acting
/4
DC amperage draws (at nominal 12 Vdc) Automatic ignition----------------------------------------------------------------------------------------------------------------- 0.50 A Divider heater ---------------------------------------------------------------------------------------------------------------------- 0.25 A Fresh food compartment lamp ------------------------------------------------------------------------------------------------- 0.46 A Gas valve--------------------------------------------------------------------------------------------------------------------------- 0.146 A Fan (N6XX/FN8XXF models only)---------------------------------------------------------------------------------------------- 0.36 A
AC power
AC heater operating voltage -----------------------------------------------------------------------------------------108 to 132 Vac Fuse AC heater circuit (F3 in power board)----------------------------------- 5 A,
1
/4
in. x 1
1
in. AGC type fast acting
/4
AC heater rating
Refrigerators with serial number lower than 854647 -----------------300 W/2.7 A @ 110 V ac (resist ance of 41.25 Ω) Refrigerators with serial number 854647 and higher --------- 300 W/2.5 A/48 Ω @ 120 Vac (resistance of 41.25 Ω)
LP gas (propane)
Operating pressure ---------------------------------------------------------------------------------------------- 10.5 to 11.5 in. w.c. Heat input----------------------------------------------------------------------------------------------------1500 Btu/h @ 1 1 in. w .c. Orifice, new style-------------------------------------------------------------------------------------------------------------------- LP16 Orifice, old style ----------------------------------------------------------------------------------------------------------0.155 jeweled Gas ignition---------------------------------------------------------------------------------- Automatic with flame sensing circuit Electrode tip-to-burner air gap --------------------------------------------------------------------------------------- 1/8 to 3/16 in.
www.norcold.com/cda 5N6XX/N8XX ModelsRefrigerator Service Manual
N64X/N64X.3/N84X/N84X.3 Models
Storage volume
N64X/N64X.3 ----------------------------------------------------------------------------------------------------------------------- 6.3 ft N84X/N84X.3 ----------------------------------------------------------------------------------------------------------------------- 7.5 ft3.
Rough opening dimensions (H x W x D) N64X/N64X.3 --------------------------------------------------------------------------------------------52 N84X/N84X.3 --------------------------------------------------------------------------------------------59
7
/8 in. x 231/2 in. x 24 in.
7
in. x 23
/8
1
in. x 24 in.
/2
Decorative panels dimensions
Thickness---------------------------------------------------------------------------------------------------------------------------
17
Freezer door (H x W, both models) ---------------------------------------------------------------------14
in. x 21
/32
19
3
/16
in. in.
/32
Fresh food compartment door N64X/N64X.3 ----------------------------------------------------------------------------------------------------31 N84X/N84X.3 ----------------------------------------------------------------------------------------------------38
5
/8
5
/8
in. x 21 in. x 21
19 19
/32 /32
in. in.
Controls
Type ------------------------------------------------------------------------------------ Electronic with built-in diagnostic function ON/OFF/MODE/TEMP SET switches ---------------------------------------------------------------------- Raised push-button Temperature settings ---------------------------------------------------------------------------------------------- 1=cold, 9=coldest T emperature sensor ----------------------------------------------------------------------------- Thermistor, fin mounted (10th fin)
Off-level operating limits
Side-to-side------------------------------------------------------------------------------------------------------- 3 degrees-maximum Front-to-back----------------------------------------------------------------------------------------------------- 6 degrees-maximum
DC power
Controls operating voltage ----------------------------------------------------------------------------------------- 10.5 to 15.4 Vdc DC fuse (F1 in power board)------------------------------------------------------------ 5 A (tan color), automotive blade type DC heater rating -----------------------------------------------------------------225 W/16 A @14 Vdc (resist ance of 0.87 Ω) DC heater operating voltage (3-way models only) ------------------------------------------------------------------ 12 – 14 Vdc Fuse, DC heater (F2, in power board) ------------------------------------------- 30 A (green color), automotive blade type Fuse, fan (N6XXFw/N8XX F models with in-line fuse holder) -------------- 1 A,
1
/4
in. x 1
1
in. AGC type fast acting
/4
3
.
DC amp draws (at nominal 12 Vdc) Automatic ignition----------------------------------------------------------------------------------------------------------------- 0.50 A DC heater --------------------------------------------------------------------------------------- 13.79 A @ 12 Vdc/16 A @ 14 Vdc Divider heater ---------------------------------------------------------------------------------------------------------------------- 0.25 A Fresh food compartment lamp ------------------------------------------------------------------------------------------------- 0.46 A Gas valve--------------------------------------------------------------------------------------------------------------------------- 0.146 A Fan (N6XX/FN8XXF models only)---------------------------------------------------------------------------------------------- 0.36 A
AC power
AC heater operating voltage requirements ----------------------------------------------------------------------- 108 to 132 V ac Fuse AC heater circuit (F3 in power board)------------------------------------ 5 A,
1
/4
in. x 1
1
in. AGC type fast acting
/4
AC heater rating
Refrigerators with serial number lower than 854647 -----------------300 W/2.7 A @ 110 V ac (resist ance of 41.25 Ω) Refrigerators with serial number 854647 and higher -------------------- 300 W/2.5 A @ 120 V ac (resist ance of 48 Ω)
LP gas (propane)
Operating pressure ----------------------------------------------------------------------------------------------- 10.5 to 11.5 in. w.c Heat input-----------------------------------------------------------------------------------------------------1500 Btu/h @ 11 in. w .c Orifice, new style-------------------------------------------------------------------------------------------------------------------- LP16 Orifice, old style ----------------------------------------------------------------------------------------------------------0.155 jeweled Gas ignition---------------------------------------------------------------------------------- Automatic with flame sensing circuit Electrode tip-to-burner air gap --------------------------------------------------------------------------------------- 1/8 to 3/16 in.
6
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Refrigerator Service ManualN6XX/N8XX Models
TROUBLESHOOTING – QUICK REFERENCE GUIDE
Problem Possible Cause Checks/Reference
The refrigerator does not turn ON.
The refrigerator does not cool on AC power.
The refrigerator does not cool efficiently on AC power.
3-Way Units Only
The refrigerator does not cool on DC power.
3-Way Units Only
The refrigerator does not cool efficiently on DC power.
No 12 Vdc power to refrigerator. Faulty/loose 12 Vdc connections. F1 fuse in power board open.
No AC power to refrigerator. F3 fuse in the power board open. AC heater failed open.
Ventilation obstructed. AC voltage low.
F2 fuse in power board open. DC heater failed open.
Ventilation obstructed. DC voltage below 12 volts.
See page 11. Check 12 Vdc connections. Check fuse F1, (5 amp) in power board.
See page 16. Check fuse F3, (5 amp) in power board. See page 18.
Check enclosure for air flow obstructions. See page 17.
Check fuse F2 (30 amp) in power board. See page 15.
Check enclosure for obstructed air flow. Check RV 12 Vdc power supply.
The refrigerator does not operate on LP gas.
The refrigerator does not cool efficiently on LP gas.
"no" "co" code.
No LP gas. Incorrect electrode tip-to-burner gap. Faulty spark/sense electrode assembly. Flame sensing circuit failure.
Ventilation obstructed. Incorrect LP gas pressure. Dirty burner. Missing flue baffle. Heat deflector blocked.
Poor ventilation. Off-level operation. DIrty burner. Low AC voltage. Cooling fan inoperative. Improper installation. Incorrect orifice.
Check LP gas supply and valves. See page 12. See page 12. See page 13.
Check enclosure for obstructed air flow. See page 12. See page 12. See page 30. See page 30.
Check enclosure for obstructed air flow. See page 37. See page 31. See page 34. See page 35. See pages 22-26. See page 29.
www.norcold.com/cda 7N6XX/N8XX ModelsRefrigerator Service Manual

N61X/N81X DISPLA YED FAUL T CODES

Problem
ON LED off.
ON LED and GAS LED flashing at one second
intervals.
ON LED on. GAS LED flashes at one second intervals.
ON LED flashes once every three seconds.
Probable Cause
Refrigerator turned off. No 12 Vdc to refrigerator. F1 fuse open.
In AUTO operation: No AC power or LP gas available
GAS operation: Burner failed to ignite or reignite.
"Gas lock-out." Burner failed to ignite or reignite.
Back-up system operation.
Reference
See page 11.
See page 16.
See page 12.
See page 12.
See page 20.
ON LED flashes twice every three seconds.
ON LED flashes three times every three
seconds.
ON LED flashes four times every three seconds.
ON LED flashes five times every three seconds.
Mode switch failure. Refrigerator operating in last selected mode.
AC heater failure.
Controls failure.
No cooling detected by the controls.
Replace optical control assembly.
See page 18.
Replace power board.
See pages 21 & 37.
8
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Refrigerator Service ManualN6XX/N8XX Models

N62X/N82X DISPLA YED FAUL T CODES

Blank
Display
Screen
Probable Cause
Refrigerator turned off. No 12 Vdc to refrigerator. F1 fuse open.
Burner failed to ignite or reignite.
Flame sense circuit failure.
DC voltage low.
DC voltage high.
ReferenceCode
See page 11.
See page 12.
See page 13.
See page 13.
See page 14.
Flashing
Tem p
Setting
AC relay stuck closed.
No AC power available to refrigerator. AC cord not plugged into power board. F3 fuse open.
AC heater failed open.
Fresh food compartment door open more then 2 minutes. Lamp reed relay switch faulty.
Back-up operating system.
No cooling detected by the controls.
See page 16.
See page 16.
See page 18.
See page 19.
See page 20.
See pages 21 & 37.
www.norcold.com/cda 9N6XX/N8XX ModelsRefrigerator Service Manual

N64X/N84X DISPLA YED FAULT CODES

Code
Blank
Display
Screen
Probable Cause
Reference
Refrigerator turned off. No 12 Vdc to refrigerator.
See page 11.
F1 fuse open.
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A
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Audible
Alarm
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A
Audible
Alarm
Audible
Alarm
Audible
Alarm
Audible
Alarm
Audible
Alarm
The burner failed to ignite or reignite.
Flame sense circuit failure.
DC voltage low.
DC relay stuck closed, 3-way models only.
DC voltage high.
DC heater failure, 3-way models only.
No AC power available to refrigerator. AC cord not plugged into power board. F3 fuse open.
AC relay stuck closed.
See page 12.
See page 13.
See page 13.
See page 14.
See page 14.
See page 15.
See page 16.
See page 16.
10
A
A
Flashing
Tem p
Setting
A
AC voltage low.
D
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AC voltage high.
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D
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Audible
AC heater failed open.
Alarm
See page 17.
See page 17.
See page 18.
Audible
Fresh food compartment door open more than 2 minutes. Lamp reed relay switch faulty.
See page 19.
Alarm
Back-up operating system.
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Audible
No cooling detected by the controls.
D
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s
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Alarm
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Refrigerator Service ManualN6XX/N8XX Models
See page 20.
See pages 21 & 37.

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.
■
12 Vdc input to the power board is wired according to the N6XX/N8XX installation manual.
Models and fault indicator displayed.
ON
GAS
check if flashing
N61X/N81X
Measure voltage at power
board 12VDC and GND1 connections.
Check condition of F1 fuse
in power board. See Figure A.
Measure voltage at optical
control harness. See Figure B.
AUTO
N62X/N82X
10.5
to
15.4 Vdc?
YES
F1 fuse okay?
YES
Voltage
present?
Blank Display Screen
LP GASAC
NO
NO
NO
Blank
Display
Screen
N64X/N84X
1. No DC power input from RV to unit.
2. Faulty wiring or connectors.
Replace fuse. Use a standard 5 amp (tan color) automotive blade type fuse.
Replace power board.
Good= 00.0
Ω
Bad = OL
R
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T E M
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87
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00.0
H
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A
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P
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/
1
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1
mV
mA
A
V
A
µ
V
F F
O
V
M
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A
µ
A
m
A
!
AX M A
0m
0
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F
AX M
V
0
0
0
1
X
A
M A
0
1
D
E
S
U F
!
Checking DC fuse continuity.
Figure A.
YES
Replace optical control board.
Wire harness optical control display connector
White/violet wire
White/red wire
10.5 to 15.4 Vdc
TRUE RMS MULTI METER
87
III
V
H
MIN MAX RANGE HOLD
HzREL
PEAK MIN MAX
4 1/2 DIGITS
1 Seconds
mV
mA
V
A
µA
V
OFF
V
COM
A
mA µA
!
400mA MAX
CAT II
FUSED
1000V MAX
10A MAX
V
!
FUSED
Optical control display wire harness connection voltage measuring points.
Figure B.
www.norcold.com/cda 11N6XX/N8XX ModelsRefrigerator Service Manual
F/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.
Models and fault indicator displayed.
ON
GAS
N61X/N81X
Check burner.
GAS LED flashing constantly
AUTO
N62X/N82X
LP GASAC
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N64X/N84X
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Audible
Alarm
Check that electrode tip-to­burner air gap is correct.
Check spark/sense electrode assembly for continuity.
Check gas valve solenoid resistance.
.
Burner clean?
YES
Air gap
1/8 to 3/16
inch?
YES
Continuity?
YES
79 to 85 Ω?
NO
NO
NO
NO
Clean and service burner. See page 30.
Set electrode-to-burner air gap 1/8 to 3/16 inch.
Replace spark/sense electrode assembly.
Replace gas valve.
12
Check gas valve solenoid wires for continuity.
Check voltage across power board terminals GV and GV GND.
YES
Continuity?
NO
YES
Voltage?
NO
YES
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Replace gas valve wires.
Replace power board.
Faulty or obstructed gas valve. Replace gas valve.
Refrigerator Service ManualN6XX/N8XX Models
S/Sr Fault Code – Flame sense circuit failure
Models and fault indicator displayed.
LP GASAC
AUTO
N62X/N82X N64X/N84X
Flame sense circuit failure.
Replace power board. See page 44.
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.
■
Determine if the DC LO fault code displays when the converter is the source of DC power.
■
Make sure no other appliance or lighting circuit is connected to the refrigerator DC circuit.
Models and fault indicator displayed.
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D
i
N64X/N84X
Check for DC voltage input to power board terminals 12VDC and GND1.
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Audible
Alarm
Voltage
lower than
10.5 Vdc?
YES
Check RV 12 Vdc power supply to refrigerator.
NO
See NOTE below to determine and correct low dc LO fault.
NOTE
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 .
T o 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.
www.norcold.com/cda 13N6XX/N8XX ModelsRefrigerator Service Manual
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.
Models and fault indicator displayed.
a
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AUTO
e
LP GASAC
A
t
l
Audib
le
N62X/N82X
Check for DC voltage input to power board terminals 12VDC and GND1.
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 HI fault code to display .
T o 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.
Voltage
higher than
15.4 Vdc?
NOTE
YES
NO
D
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N64X/N84X
Check RV DC power distribution to refrigerator.
See NOTE below to determine and correct low dc HI fault.
Alarm
14
dc rE Fault Code – DC relay stuck closed
Models and fault indicator displayed
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N64X/N84X
DC relay stuck closed.
Audib
Alarm
le
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Replace power board. See page 44.
Refrigerator Service ManualN6XX/N8XX Models
dc HE Fault Code – DC heater failed open
Before beginning this procedure make sure:
■
The RV DC electrical system is maintaining 10.5 to 15.4 Vdc to the refrigerator.
■
No other appliance or lighting circuit is connected to the refrigerator DC circuit.
Model and fault indicator displayed.
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Audible
D
N64X.3/N84X.3
Check condition of F2 fuse in power board.
Check DC heater resistance. See Figure.
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Alarm
F2 fuse
okay?
YES
Resistance
0.81 to 0.91
YES
NO
NO
Ω
?
Replace fuse. Use a standard 30 amp (green color) automotive blade type fuse.
Replace DC heater.
Replace power board.
DC heater resistance 0.81 to 0.91
www.norcold.com/cda 15N6XX/N8XX ModelsRefrigerator Service Manual
Ω.Ω.
Ω.
Ω.Ω.
A/no AC Fault Code – No AC power available
Before beginning this procedure make sure:
■
No other problem 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.
Models and fault indicator displayed.
ON
GAS
check if flashing
Does not operate on AC when set to AUTO.
N61X/N81X
Measure voltage at power
board AC cord connection.
Check condition of F3 fuse
in power board.
AUTO
N62X/N82X
108
to
132 Vac?
YES
F3 fuse okay?
YES
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Audib
e
l
LP GASAC
Alarm
NO
NO
D
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p
N64X/N84X
1. Check AC power input from RV to unit.
2. Check for faulty AC power cord.
Replace fuse. Use a 5 amp, 1/4" x 11/4" AGC type fuse.
Check that fuse holder clips are making full contact with fuse.
Clips okay?
YES
r/AC rE Fault Code – AC relay stuck closed
Models and fault indicator displayed.
LP GASAC
AUTO
N62X/N82X
Flame sense circuit failure.
NO
Adjust clips to ensure fuse contacts are firm in clips and making full contact.
Replace power board.
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Audib
Alarm
N64X/N84X
Replace power board. See page 44.
le
16
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Refrigerator Service ManualN6XX/N8XX Models
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.
■
Make sure extension cords are not being used to supply AC power to the refrigerator.
Model and indicator displayed.
a
n
t
r
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A
e
t
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n
g
le
Audib
D
N64X/N84X
Measure voltage at power board AC cord connection.
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Alarm
Voltage
lower than
108 Vac?
YES
NO
Fault related to RV AC power distribution
component or circuit supplying AC power to refrigerator.
Replace power board.
AC HI Fault Code – AC voltage high
Before beginning this procedure:
■
Determine if a certain AC power source sets the AC HI fault code (generator, shore power, inverter).
Model and indicator displayed.
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l
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y
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p
N64X/N84X
Measure voltage at power board AC cord connection.
Audible
Alarm
Voltage
higher than
132 Vac?
www.norcold.com/cda 17N6XX/N8XX ModelsRefrigerator Service Manual
YES
NO
Fault related to RV AC power distribution
component or circuit supplying AC power to refrigerator.
Replace power board.
H/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.
Models and indicator displayed.
a
n
t
r
i
e
t
l
A
ON
Flashin
g 3 tim
es e
very 3 seco
nds
GAS
N61X/N81X
Check AC heater wires for loose or damaged connector.
AUTO
N62X/N82X
LP GASAC
Heater
connections
okay?
YES
N64X/N84X
NO
D
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Repair or replace connectors. If connectors cannot be repaired, replace heater.
n
g
Audible
Alarm
Check AC heater resistance. See See Figure.
Resistance
Ω
38 to 53
NO
?
YES
AC heater resistance 38 to 53
Replace AC heater.
Replace power board.
Ω.
18
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Refrigerator Service ManualN6XX/N8XX Models
d/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.
Models and fault indicator displayed.
LAP GASAC
AUTO
N62X/N82X
Check that the door latch striker plate is adjusted correctly.
Striker plate
okay?
YES
NO
N64X/N84X
Adjust striker plate.
Audib
Alarm
le
Check for correct door installation. See NOTE below.
Was door
swing
changed?
YES
Food Compartment Lamp Switch
The reed relay switch that turns the fresh food compartment light on and off is an integral component of the optical control display board circuitry .
Lamp Switch Operation
The magnetic pull from a permanent magnet located underneath the top door trim maintains the switch contacts open (light off) when the door is fully closed. Opening the door breaks the magnetic pull, which in turn causes the switch contacts close (light on).
NOTE
Always follow the instructions provided in the Owner's Manual to change the refrigerator door swing. The bottom door trim does not have a magnet. Inverting the doors will required non-approved modifications and will cause the fresh food compartment light to remain on when the door is closed.
NO
Test lamp switch operation. See switch
test procedure below.
Check for location of magnet if the door swing was changed. See NOTE.
Move tip
Magnetic tip screwdriver
Lamp Switch Testing Procedure
1. Slide a magnetic screwdriver tip or a small magnet on the underside of the optical control assembly as shown in the figure above.
2. Check the food compartment light as the screwdriver tip is moved under the display , the light:
a. should turn off when the magnetic screwdriver tip or magnet passes under the optical control assembly.
b. turn on when the magnetic screwdriver tip or magnet is distanced from the underside of the optical control assembly.
3. If the light does not turn off when the magnet passes under the optical control display , replace the optical control display assembly .
www.norcold.com/cda 19N6XX/N8XX ModelsRefrigerator Service Manual
Thermistor Failure Fault – Controls in backup operating system mode
Before beginning this procedure:
■
Make sure lamp/thermistor assembly is connected to wire harness.
Models and fault indicator displayed.
ON
Flash
ing
once every 3 seconds
GAS
N61X/N81X
Check lamp/thermistor wire assembly and connector for dirty/broken connections.
Lamp
Connection
Thermistor
Connections
AUTO
Wires and
connector
good?
YES
Temp
Setting
Flashing
LP GASAC
Temp
Setting
Flashing
N64X/N84XN62X/N82X
NO
R
E
T IME
T
L
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MS R
E
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T
7
8
III
H
D
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A
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K
A
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P
S
T
I IG
D
2
/
1
4
s
d
n
o
c
e
S
1
mV
mA
A
V
A
µ
V
F
F
O
V
M
O
C
A
µ
A
m
A
!
X
A M
A
m
0
0
4
I
I
T
A
C
D
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F
X
A
M
V
0
0
0
1
X
A
M
A
0
1
D
E
S
U
F
!
Clean/repair terminals or connector as required. See Figure A.
Check thermistor resistance. See Figure B and procedure below.
Temperature* Resistance* (oF) (k ) 85 8.1– 9.0 80 9.1–10.0 75 10.1–11.0 70 11.1–12.0 60 12.1–13.0 50 15.5–16.5 40 22.5–23.5 35 24.5–25.5 33 28.5–29.5 32 30.0–32.0
*
Approximate Values
Thermistor
Figure A. Figure B.
Backup Operating System (BOS)
The backup operating system (BOS) is an electronically controlled duty cycle that maintains the refrigerator in operation if the thermistor is disconnected or fails. The BOS maintains cooling by timing the length of time the heat source is energized. When the refrigerator is operating in BOS, the length of the cooling cycle has to be regulated manually using the TEMP switchbutton.
When a colder temperature is desired, changing the temperature setting to a higher number provides additional cooling by lengthening the cooling cycle. For example, if the temperature setting is set to 5, raising the setting to 6 will lengthen the cooling cycle.
20
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Thermistor packed in ice bath
When a warmer temperature is desired, changing the temperature setting to a lower number shortens the cooling cycle. For example, if the temperature setting is set to 6, lowering the setting to 5 will shorten the cooling cycle.
N61X/N81X Backup Operation.
When the N61X/N81X controls shift to BOS operation, the ON LED (green) flashes once every three seconds.
N62X/N82XN64X/N84X Backup Operation
When the N62X/N82XN64X/N84X controls shift to BOS operation, the temperature setting flashes for ten seconds when the TEMP button is pressed. Af ter ten seconds, the selected operation mode indicator displays.
Refrigerator Service ManualN6XX/N8XX Models
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