Norcold N510 Service Manual

DRAFT
NOT FOR PUBLIC RELEASE
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 in-
take and exhaust ventilation for correct and safe operation. Any other ventila-
tion could cause lethal combustion exhaust fumes and or/explosive propane
gas fumes to be in the living area and/or below deck.
Service Manual
Publication No. 626800A (06-08-04)
© 2004 THETFORD/NORCOLD. All rights reserved.
!
WARNING
Gas/Electric Refrigerators
N510
N500
MODELS

Norcold N510 Specifications

General

Brand	Norcold
Model	N510
Category	Refrigerator
Language	English

Summary

SAFETY AWARENESS

Safety Notice

Safety Statements

Lists critical safety rules for operating and servicing the refrigerator.

TROUBLESHOOTING

Quick Reference Guide

A table correlating problems with possible causes and checks.

N510 Displayed Fault Codes

Lists fault codes displayed by the N510 model and their probable causes.

N500 Troubleshooting Flowcharts

Flowcharts for diagnosing common N500 unit problems.

Burner Will Not Maintain Flame - N500 Units

Troubleshooting flowchart for burner flame issues on N500 models.

No AC Operation - N500 Units

Troubleshooting flowchart for N500 units not operating on AC power.

No DC Operation - N500.3 (3-Way Units Only)

Troubleshooting flowchart for N500.3 units not operating on DC power.

No LP Operation - N500 Units

Troubleshooting flowchart for N500 units not operating on LP gas.

Thermocouple and Interrupter Malfunctioning - N500 Units

Troubleshooting flowchart for thermocouple and interrupter issues on N500.

N510 Troubleshooting Flowcharts

Flowcharts for diagnosing common N510 unit problems.

Blank Display - Refrigerator does not turn on - N510

Troubleshooting flowchart for N510 with a blank display or no power.

Optical Display Does Not Turn On - Power is available - N510

Troubleshooting flowchart for N510 optical display issues when power is available.

F Fault Code - Burner failed to ignite or reignite - N510

Troubleshooting flowchart for the N510 'F' fault code (ignition failure).

E Fault Code - DC voltage high - N510

Troubleshooting flowchart for the N510 'E' fault code (high DC voltage).

C Fault Code - DC voltage low - N510

Troubleshooting flowchart for the N510 'C' fault code (low DC voltage).

A Fault Code - No ac power available - N510

Troubleshooting flowchart for the N510 'A' fault code (no AC power).

S Fault Code - Flame sense circuit failure - N510

Troubleshooting flowchart for the N510 'S' fault code (flame sense failure).

H Fault Code - AC heater failed open - N510

Troubleshooting flowchart for the N510 'H' fault code (AC heater failure).

r Fault Code - AC relay stuck closed - N510

Troubleshooting flowchart for the N510 'r' fault code (AC relay stuck).

Thermistor Failure Fault - Controls in Backup Operating System Mode - N510

Troubleshooting flowchart for N510 thermistor failure in Backup Operating System.

N Fault Code - No cooling detected by the controls - N510

Troubleshooting flowchart for the N510 'n' fault code (no cooling detected).

LP GAS SYSTEM - ALL MODELS

Burner

Handling of LP Gas Lines and Fittings

Testing for Gas Leakage

ELECTRICAL REQUIREMENTS AND COMPONENTS

AC Power

AC Power Requirements - All Models

AC Heater

AC Fuse

DC Power

DC Power Requirements

DC Heater - N500.3/N510.3

Relighter - N500/N500.3

DC Heater-3-Way Refrigerators Only

Replacing AC or DC Heater

COOLING UNIT

Leveled Operation

Gradual Decrease in Cooling Efficiency

Lists factors that can cause a gradual decrease in cooling efficiency.

Cooling Monitoring - N510 Units Only

Describes the N510 cooling monitoring system and its activation conditions.

Cooling Monitoring Control Operation

Explains the sequence of operation for the cooling monitoring system.

Refrigerant Leakage - All Models

Disposal of Cooling Unit - All Models

Cooling System Diagnostic Flowchart

Replacing the Cooling Unit

Removing the Refrigerator from the Enclosure

Removal of Cooling Unit

Installation of Replacement Cooling Unit

ELECTRONIC COMPONENTS - ALL MODELS

Spark/sense Electrode - All Models

Replacing Spark/sense Electrode

ELECTRONIC COMPONENTS - N500 MODELS

Relighter - N500 Models

Flame Indicator - N500 Models

Flame Indicator Replacement

ELECTRONIC COMPONENTS - N510 MODELS

Power Board - N510 Models

Removal-Power Board

Installation-Power Board

CONTROLS

N500 Controls

Replacing Selector Switch - N500

N510 Controls

Replacing Optical Control Circuit Board - N510

N510 Modes of Operation

AUTO Mode - All N510 Units

AUTO Mode - N510.3 (3-way units)

AUTO AC Operation

AUTO LP Gas Operation

Shift from AUTO LP Gas to AUTO AC - 2-ways

No AC Power and No Flame

Troubleshooting a "F" and "A" Faults

AUTO DC Operation - 3-Way Units Only

AC Manual Mode

No AC Power or Loss of AC Power

Troubleshooting an "A" Fault

AC Power Restored

LP Gas Manual Mode

Flame Fails to Ignite or Flame Goes Out

Clearing "Gas Lock-Out"

Troubleshooting an "F" Fault

DC Manual Mode: 3-Way Units Only

N510 DIAGNOSTIC MODE

Diagnostic Mode

Overview of the diagnostic mode using nine channels for live data.

Accessing the Diagnostic Mode

Steps to enter the diagnostic mode using control buttons.

Changing Screens

Instructions on how to navigate through different diagnostic screens.

Exiting the Diagnostic Mode

Screens and Diagnostic Segments Information

Screen 1 Diagnostic Mode Active

Confirms diagnostic mode activation with all LED segments lit.

Screen 2 LED Segments Reliability Check

Checks display reliability; screen should go blank after number.

Screen 3 Thermistor Fin Temperature

Displays the actual fin temperature sensed by the thermistor.

Screen 4 Stored Fault History

Displays stored fault history using lighted LED segments.

Screen 5 Stored Fault History

Displays additional stored fault history using lighted LED segments.

Screen 6 Erase Fault History Data

Provides a method to erase stored fault history data from memory.

Screen 7 Power Board Inputs

Displays live power board inputs using lighted LED segments.

Screen 8 Power Board Outputs

Displays live power board outputs using lighted LED segments.

Screen 9 Power Board DC Voltage Status

Displays power board DC voltage status and assigned segments.