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Norcold Polar N8X User Manual

Norcold Polar N8X
60 pages
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© 2017 NORCOLD, INC. All rights reserved.
Part No. 639410 Rev. A 04.17.2018
Service Manual
Gas Electric Refrigerators
Questions? 1-800-444-7210
Improper installation, adjustment, altera-
tion, service or maintenance can cause
personal injury or property damage. Refer
to this manual. For assistance or addition-
al information, contact a qualied installer,
service agency, or the gas supplier.
Polar 7 Series (N7V, N7X, N7LX) Models
Polar 8 Series (N8V, N8X, N8LX) Models

Table of Contents

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Norcold Polar N8X Specifications

General IconGeneral
TypeAbsorption Refrigerator
Capacity8 cu. ft.
AC Voltage120V
DC Voltage12V
RefrigerantAmmonia
Power SourceAC, DC, LP Gas
Energy Consumption (AC)3.0 kWh/day
Energy Consumption (LP Gas)0.5 lbs per day
ColorBlack

Summary

Safety Precautions

Refrigerator Specifications

Propane Gas Connections

Electrical Connections

Main Control Board Fuses

Preventative Maintenance

User Interface - N7V/N8V Models

Fault Codes - N7V/N8V Models

Fault Code Display via Flash Patterns

Explains how fault codes are displayed via flash patterns on the indicator light.

Fault Code Reference Table

Table mapping flash patterns to fault meanings and recommended actions.

Troubleshooting: Solid Red Indicator Light

Diagnosing Solid Red Light Fault

Flowchart for diagnosing a solid red indicator light, checking power, fuses, and burner.

Troubleshooting: Flash Pattern 1

Troubleshooting: Flash Pattern 2

Troubleshooting: Flash Pattern 3

Troubleshooting: Flash Pattern 4

Troubleshooting: Flash Pattern 5

Troubleshooting: Flash Pattern 8

Troubleshooting: Flash Pattern 9

Troubleshooting: Flash Pattern 10

Troubleshooting: Thermistor Fault

Diagnosing Thermistor Fault

Flowchart for diagnosing thermistor faults, checking wiring and resistance.

Troubleshooting: Blank Display

Diagnosing Blank Display Issue

Flowchart for diagnosing a blank display, checking DC voltage, fuses, and wiring.

User Interface - N7X/N8X Models

Fault Codes - N7X and N8X Models

N7X/N8X Fault Code Flash Patterns

Explains how fault codes are displayed via flash patterns on the power ON/indicator light.

Fault Codes - N7X/N8X Models

N7X/N8X Flash Pattern Reference

Table mapping flash patterns to fault meanings and recommended actions for N7X/N8X models.

Troubleshooting: Solid Red Indicator Light (N7X/N8X)

Diagnosing Solid Red Light Fault (N7X/N8X)

Flowchart for diagnosing a solid red indicator light, checking power, fuses, and burner.

Troubleshooting: Flash Pattern 1 (N7X/N8X)

Diagnosing Flash Pattern 1 (AC Heater)

Flowchart for diagnosing Flash Pattern 1 (AC heater fault), checking wiring and resistance.

Troubleshooting: Flash Pattern 2 (N7X/N8X)

Diagnosing Flash Pattern 2 (Internal Fault)

Flowchart for diagnosing Flash Pattern 2 (Internal control fault).

Troubleshooting: Flash Pattern 3 (N7X/N8X)

Diagnosing Flash Pattern 3 (Limit Circuit)

Flowchart for diagnosing Flash Pattern 3 (Internal control fault).

Troubleshooting: Flash Pattern 4 (N7X/N8X)

Diagnosing Flash Pattern 4 (AC Heater Relay)

Flowchart for diagnosing Flash Pattern 4 (AC heater relay stuck).

Troubleshooting: Flash Pattern 5 (N7X/N8X)

Diagnosing Flash Pattern 5 (Gas Valve)

Flowchart for diagnosing Flash Pattern 5 (Gas valve stuck open).

Troubleshooting: Flash Pattern 8 (N7X/N8X)

Diagnosing Flash Pattern 8 (Low DC Voltage)

Flowchart for diagnosing Flash Pattern 8 (Low DC input voltage).

Troubleshooting: Flash Pattern 9 (N7X/N8X)

Diagnosing Flash Pattern 9 (High DC Voltage)

Flowchart for diagnosing Flash Pattern 9 (High DC input voltage).

Troubleshooting: Flash Pattern 10 (N7X/N8X)

Diagnosing Flash Pattern 10 (Communication Loss)

Flowchart for diagnosing Flash Pattern 10 (Communication loss).

Troubleshooting: Thermistor Fault (N7X/N8X)

Diagnosing Thermistor Fault (N7X/N8X)

Flowchart for diagnosing thermistor faults, checking wiring and resistance.

Troubleshooting: Blank Display (N7X/N8X)

Diagnosing Blank Display Issue (N7X/N8X)

Flowchart for diagnosing a blank display, checking DC voltage, fuses, and wiring.

User Interface - N7LX/N8LX Models

Fault Codes - N7LX/N8LX Models

N7LX/N8LX LCD Fault Code Reference

Table listing LCD fault codes, meanings, and recommended actions for N7LX/N8LX models.

Troubleshooting: "no" "FL" Alarm

Diagnosing "no" "FL" Alarm

Flowchart for diagnosing 'no FL' alarm, checking burner, gap, and gas train.

Troubleshooting: "no" "AC" Alarm

Diagnosing "no" "AC" Alarm

Flowchart for diagnosing 'no AC' alarm, checking AC input voltage and fuses.

Troubleshooting: "AC" "HE" Alarm

Diagnosing "AC" "HE" Alarm

Flowchart for diagnosing 'AC HE' alarm, checking AC heater wiring and resistance.

Troubleshooting: "dc" "HE" Alarm

Diagnosing "dc" "HE" Alarm (DC Heater)

Flowchart for diagnosing 'dc HE' alarm (DC heater fault).

Troubleshooting: "AC" "rE" Alarm

Diagnosing "AC" "rE" Alarm (AC Relay)

Flowchart for diagnosing 'AC rE' alarm (AC heater relay stuck).

Troubleshooting: "dc" "rE" Alarm

Diagnosing "dc" "rE" Alarm (DC Relay)

Flowchart for diagnosing 'dc rE' alarm (DC heater relay stuck).

Troubleshooting: "Lo" "dc" Faults

Diagnosing Low DC Voltage Faults

Flowcharts for diagnosing 'Lo dc' / 'Lo dC' (low DC voltage) faults.

Troubleshooting: "HI" "dc" Alarm

Diagnosing "HI" "dc" Alarm

Flowchart for diagnosing 'HI dc' (high DC voltage) fault.

Troubleshooting: "no" "dt" Alarm

Troubleshooting: "Sr" Alarm

Troubleshooting: "oP" "LI" Alarm

Troubleshooting: “FL” “- -” Alarm

Troubleshooting: Flashing Temperature Setting

Cooling System Diagnostic Flowchart

Cooling System Diagnostics

Remove / Replace Refrigerator

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