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Improper installation,
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WARNING
AVERTISSEMENT
DANGER
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ATTENTION
ATTENTION
ATTENTION
ATTENTION
adjustment, alteration,
service or maintenance
can cause personal
injury or property
damage. Refer to this
manual. For assistance
or additional informa-
tion, contact a quali-
fi ed installer, service
agency, or the gas
supplier.
Questions? / Des questions? / ¿Preguntas? 1-800-543-1219
N8DCX, N10DCX Models
Service Manual
Compressor Refrigerators
N8DCX
N10DCX
Part No. 640083 Rev. D 05.09.2022
English
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Table of Contents
Related Manuals for Norcold N8DCX
Summary of Contents for Norcold N8DCX
- Page 1 Refer to this manual. For assistance or additional informa- tion, contact a quali- fi ed installer, service agency, or the gas supplier. Questions? / Des questions? / ¿Preguntas? 1-800-543-1219 N8DCX, N10DCX Models Part No. 640083 Rev. D 05.09.2022...
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Page 2: Table Of Contents
Replace Refrigerator ..................36 Incorrect installation, adjustment, change to, or maintenance of this refrigerator can cause personal injury, property damage, or both. Have service and maintenance work done by your dealer or by an authorized Norcold Service Center. N8DCX, N10DCX Models www.norcold.com... -
Page 3: Introduction
If unable to resolve technical issues using the information provided Certifi cation and Code Requirements in this manual, technical support is available through NORCOLD ® Customer Service Center: ... -
Page 4: Refrigerator Model Number
Model Number Amount of refrigerant in cooling system DC Voltage / Amperage SPECIFICATIONS N8DCX and N10DCX - Electronic ON/OFF, Mode, Temperature Set Multiple LED indicator lights Five (5) Temperature Settings (Separate settings for freezer and fresh food compartments) Night Mode Rough Opening Dimensions N8DC ----------------------------------- 52.88 - 53.01 inches high x 23.50 - 23.63 inches wide x 24.00 inches deep... -
Page 5: Exploded Views
Exploded Views Fig. 2 - Front view Description Control Panel Control Panel Label User Interface Control Board Control Housing Control Housing Bracket (3x) Fan and Housing Light Housing Light Light Cover Door Light Switch www.norcold.com SERVICE MANUAL... -
Page 6: Fig. 3 - Rear View
Exploded Views, cont’d. Fig. 3 - Rear view No. Description Exterior Fan Vent Exterior Fan Drip Cup Compressor Power Module N8DCX, N10DCX Models www.norcold.com... -
Page 7: General Information
0.3 VDC. refrigerator. 3. Cause continuous operation of the Recommended Wire Size refrigerator cooling system. 4. Cause fast battery discharge. N8DCX / N10DCX Cable Size Acceptance 5. Void the refrigerator warranty. Cable Length Cable Strand (Feet Max) Count... -
Page 8: Diagnostics
Refer to the “Compressor Power Module compressor error Self - Test Diagnostic Chart. ” codes found? Are any Refer to the “User Interface Control User Interface Board Fault Code Chart. ” error codes found? Refer to “Symptom Diagnostic Chart. ” N8DCX, N10DCX Models www.norcold.com... -
Page 9: Power Module Self-Test Diagnostics
■ One (1) 1/4 inch adapter with one (1) female to two (2) male connections. (See Fig. 4.1, C) Do not leave jumpers in place for normal NOTICE operation. 12/24 Vdc Fig. 4.1 - LED Fig. 4.4 - Adapter www.norcold.com SERVICE MANUAL... -
Page 10: Diagnostic Charts
Test D. Thermal Cut-Out of Compressor Power Module. Perform The compressor power module is running too hot Test E. (>203°F) Compressor Power Module Hardware Failure. Perform A failure is detected in the compressor power module. Test K. N8DCX, N10DCX Models www.norcold.com... -
Page 11: Test A - Compressor Power Module Battery Protection Cut-Out
DC input connector. Is VDC Repair DC supply voltage. 11.9 - 15.6? With freezer and fresh food compartments at temperature setting “5” and the compressor running, measure voltage at DC connector. Continued on next page. www.norcold.com SERVICE MANUAL... - Page 12 - Check for frayed / damaged wires. - Check 90° Faston connectors on compressor. Replace compressor power module. Redo the test in “Compressor Power Module Self-Test Diagnostics Chart.” Has Error Code 2 Repair complete. cleared? Replace the refrigerator. N8DCX, N10DCX Models www.norcold.com...
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Page 13: Test B - Fan Over Current Cut-Out
Check that all terminals are wired as per the wiring diagram. Are all Correct wiring to the compressor power connections module so that it matches the wiring diagram. correct? Has Error Code 2 Replace compressor power module. cleared? Repair complete. www.norcold.com SERVICE MANUAL... -
Page 14: Test C Compressor Motor Start Error
DC power supply connected. Turn refrigerator OFF for a minimum of five (5) minutes to allow internal system pressures to equalize. Turn refrigerator back ON. Does code Repair complete. 3 return? Replace the refrigerator. N8DCX, N10DCX Models www.norcold.com... -
Page 15: Test D - Minimum Compressor Motor Speed
110°F (43° C). Correct input voltage. 10.4 - 15.6? fan operating, Replace fan and / or clean coils. coils clean/not blocked? Does code Replace compressor power module. 4 return? Does code Repair is complete. 4 return? Replace the refrigerator. www.norcold.com SERVICE MANUAL... -
Page 16: Test E - Compressor Power Module Thermal Cut-Out
110°F (43° C). - unit is powered OFF until the compressor power module cools to below 165° F (74°C). Turn refrigerator ON. Make sure fan is running. Does code Repair is complete. 5 return? Replace compressor power module. N8DCX, N10DCX Models www.norcold.com... -
Page 17: Test F - Not Cooling, Compressor Not Turning On
The input voltage must be within 11.9 - 15.6 VDC. Is VDC Correct DC input voltage. 11.9-15.6? Remove thermistors and with a DMM measure resistance across the terminals of the connectors at 75°F (±5°). The resistance should be Continued on next page. www.norcold.com SERVICE MANUAL... - Page 18 With the compressor harness still unplugged from compressor, measure Go to resistance between all three (3) current lead-in pins on the compressor. All equal. measured values within Replace compressor power module. range? Replace the refrigerator. N8DCX, N10DCX Models www.norcold.com...
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Page 19: Test G - Refrigerator Gets Too Cold
Does Replace thermistor. thermistor test good? Inspect diverter valve, wiring, and tubing. Check for damaged or frayed over-cooling wiring, pinched or bent tubing, and problem damage to diverter valve housing. fixed? Repair complete. Continued on next page. www.norcold.com SERVICE MANUAL... - Page 20 Continued from previous page. diverter valve Replace refrigerator. damage present? diverter valve Repair diverter valve wiring damage. wiring damage present? over-cooling Disconnect wires to compressor problem power module “T”. fixed? Repair complete. Continued on next page. N8DCX, N10DCX Models www.norcold.com...
- Page 21 Compressor should be OFF a 4.7 VDC fixed? or higher and ON at 2.7 - 3.3 VDC. Repair complete. Is VDC 4.7+ and Replace compressor power module. compressor running? Replace the user interface control board. over-cooling Repair complete. problem fixed? Replace refrigerator. www.norcold.com SERVICE MANUAL...
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Page 22: Test H - Refrigerator Builds Frost Inside
/ or fresh food compartments, settings on high especially if refrigerator is operated end of range? in higher humidity conditions. Try to keep door openings to minimum occurrences and time open, especially if refrigerator is operated in high humidity conditions. N8DCX, N10DCX Models www.norcold.com... -
Page 23: Test I - Compressor Runs But Does Not Cool Properly
Remove refrigerator from enclosure, problem but do not disconnect the DC supply. fixed? Repair complete. Inspect condenser coil for restriction. Is the Remove restriction and clean condenser as needed. restricted? cooling problem fixed? Repair complete. Continued on next page. www.norcold.com SERVICE MANUAL... - Page 24 Were problems Repair all problems that were found with wiring during wiring / connector inspection. found? cooling Replace the user interface problem control board. fixed? Repair complete. cooling Repair complete. problem fixed? Replace refrigerator. N8DCX, N10DCX Models www.norcold.com...
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Page 25: Test J - Will Not Run On Dc Power
Check with DMM to insure continuity. fuse Replace fuse. blown? Check that wiring to the refrigerator conforms to the requirements of the N8DCX / N10DCX cable size acceptance table on page 7. Correct input wiring to Is wiring wiring per refrigerator so that it... - Page 26 / connector inspection. found? problem fixed? Repair complete. Does Replace user interface user interface control board. power Does compressor Replace compressor power module. motor come over-cooling Repair complete. problem fixed? Replace refrigerator. N8DCX, N10DCX Models www.norcold.com...
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Page 27: Test K - Voltage Within Cut-Out Range But Refrigerator Powers Off
Replace compressor code power module. present? Check that wiring to the refrigerator conforms to the requirements of the N8DCX / N10DCX cable size acceptance table on page 7. wiring Correct input wiring so that it conforms to requirements. Table? Refer to “Wiring Diagram” section:... - Page 28 Test K - Voltage Within Cut-Out Range, But Refrigerator Powers OFF, cont'd. Continued from previous page. Were problems Correct DC input voltage. found with wiring? problem Replace user interface control board. fixed? Repair complete. problem Repair complete. fixed? Replace refrigerator. N8DCX, N10DCX Models www.norcold.com...
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Page 29: Troubleshoot User Interface Control Board Fault Codes
Remove the fresh foods thermistor. Is the Measure the resistance across the fault code terminals of the connector with a DMM cleared? at 75 °F (± 5 °). The resistance should Repair complete. Continued on next page. www.norcold.com SERVICE MANUAL... - Page 30 Repair complete. Is the thermistor Repair any damage to the wiring wiring or connectors. damaged? Is the fault code Replace thermistor. cleared? Repair complete. N8DCX, N10DCX Models www.norcold.com...
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Page 31: Fault Code - "E2
Remove the fresh foods thermistor. Is the Measure the resistance across the fault code terminals of the connector with a DMM cleared? at 75 °F (± 5 °). The resistance should Repair complete. Continued on next page. www.norcold.com SERVICE MANUAL... - Page 32 Repair complete. Is the thermistor Repair any damage to the wiring wiring or connectors. damaged? Is the fault code Replace thermistor. cleared? Repair complete. N8DCX, N10DCX Models www.norcold.com...
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Page 33: Fault Code - "E3
Correct the input voltage. 11.9 - 15.6? Check that wiring to the refrigerator conforms to the requirements of the N8DCX / N10DCX cable size acceptance table on page 7. Correct input wiring to refrigerator so wiring per that it conforms to requirements. -
Page 34: Fault Code - "E4
Are all connectors Connect all wiring harness connectors to the correct header connectors on connected the board per wiring diagram. correctly? Is the Replace user interface fault code control board. cleared? Repair complete. N8DCX, N10DCX Models www.norcold.com... -
Page 35: Wiring Diagram
Fig. 6 - Wiring diagram Item Description User Interface Control Board 12 VDC Input 15A Fuse Compressor Power Module Exterior Fan Freezer Compartment Thermistor Fresh Food Compartment Thermistor Interior Light Interior Fan Interior Light Switch Diverter Valve www.norcold.com SERVICE MANUAL... -
Page 36: Refrigerator Enclosure
2. Remove the mounting screws from each mounting bracket. Pull the refrigerator forward. Replace Refrigerator 1. Push refrigerator fully into enclosure. Install screw into each mounting bracket. 2. Connect all power supplies to the refrigerator. N8DCX, N10DCX Models www.norcold.com...
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