DRAFT
NOT FOR PUBLIC RELEASE
i
N500/N510 Models
Refrigerator Service Manual
www.norcold.com/cda
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
N500 Models ........................................................................ 4
N510 Models ........................................................................ 5
Troubleshooting - Quick Reference Guide ------------ 6
N510 Displayed Fault Codes-------------------------------- 7
Troubleshooting Flowcharts - N500 Units -------------- 8
Burner Will Not Maintain Flame - N500 Units ..................... 8
No AC Operation - N500 Units ............................................ 9
No DC Operation - N500.3 (3-Way Units Only)................. 10
No LP Operation - N500 Units .......................................... 11
Thermocouple and Interrupter Malfunctioning.................. 12
Troubleshooting Flowchart - N510 Units--------------- 13
Blank Display - Refrigerator does not turn on - N510 ...... 13
Optical Display Does Not Turn On - Power is available... 14
F Fault Code - Burner failed to ignite or reignite - N510... 15
E Fault Code - DC voltage high - N510 ............................. 16
C Fault Code - DC voltage low - N510 .............................. 16
S Fault Code - Flame sense circuit failure - N510 ........... 17
A Fault Code - No ac power available - N510 ................... 17
H Fault Code - AC heater failed open - N510 ................... 18
r Fault Code - AC relay stuck closed - N510 ..................... 18
Backup Operating System - N510 Models ........................ 19
Thermistor Failure Fault - Controls in Backup Operating
System Mode - N510 ......................................................... 19
Power Board Resetting Procedure ................................... 20
N Fault Code - No cooling detected by the controls ......... 20
Ventilation------------------------------------------------------- 21
Roof Exhaust Venting ......................................................... 21
Air Intake Vent .................................................................. 21
Roof Exhaust Vent............................................................ 21
Baffles ............................................................................... 21
Vertical Angled Baffles ...................................................... 21
Double Sidewall Venting .................................................... 22
Air Intake Vent .................................................................. 22
Sidewall Exhaust Vent ...................................................... 22
Components ...................................................................... 23
Manual Shutoff Valve ....................................................... 23
Orifice................................................................................ 23
LP Gas System - N500 --------------------------------------- 23
Gas Safety Valve .............................................................. 24
Gas Safety Valve Replacement....................................... 24
LP Gas System - N510 --------------------------------------- 25
Components ...................................................................... 25
Solenoid Gas Valve ......................................................... 25
Orifice................................................................................ 25
LP Gas System - ALL MODELS --------------------------- 26
Components Continued - All Models ................................ 26
Burner ............................................................................... 26
Flue Tube.......................................................................... 26
Flue Cap ........................................................................... 26
Flue Baffle ......................................................................... 26
Handling of LP Gas Lines and Fittings ............................. 26
LP Gas Pressure ............................................................... 27
Testing for Gas Leakage ................................................... 27
Method A: .......................................................................... 27
Method B: .......................................................................... 27
Bubble leak test solution/soap and water leak test: ....... 27
Pressure drop test: ........................................................... 27
Burner Cleaning Procedure............................................... 28
Electrical Requirements and Components ----------- 29
AC Heater ......................................................................... 29
AC Fuse ............................................................................ 29
AC Power ............................................................................ 29
AC Power Requirements - All Models ............................. 29
DC Power ........................................................................... 29
DC Power Requirements ................................................. 29
N500 (2-way models) ....................................................... 29
N510 (2-way models) ....................................................... 29
N500.3/N510.3 (3-way models)....................................... 29
DC Heater - N500.3/N510.3............................................. 29
Relighter - N500/N500.3 .................................................. 29
DC Heater–3-Way Refrigerators Only ............................. 30
2-Way Model Wiring ......................................................... 30
3-Way Model Wiring ......................................................... 30
DC Heater Circuit Fuse .................................................... 30
Replacing AC or DC Heater ............................................... 30
AC Power Cord ................................................................... 31
N500 AC Power Cord ....................................................... 31
N510 AC Power Cord ....................................................... 31
N500 Terminal Block ......................................................... 31
AC/DC Converter as Power Source - ................................ 31
N510 Only ........................................................................... 31
Cooling Unit----------------------------------------------------- 32
Description ......................................................................... 32
Heat Absorption ............................................................... 32
Leveled Operation............................................................ 32
Gradual Decrease in Cooling Efficiency ........................... 32
Cooling Monitoring - N510 Units Only ............................... 32
Second "n" Fault Code ..................................................... 33
Cooling Monitoring Control Operation............................. 33
First "n" Fault Code........................................................... 33
Refrigerant Leakage - All Models ...................................... 33
Disposal of Cooling Unit - All Models................................ 33
Cooling System Diagnostic Flowchart .............................. 34
Removing the Refrigerator from the Enclosure .............. 36
Replacing the Cooling Unit................................................ 36
Removal of Cooling Unit.................................................. 37
Installation of Replacement Cooling Unit. ...................... 39
Installation of Refrigerator into Enclosure....................... 40
Electronic Components - All Models-------------------- 41
Spark/sense Electrode - All Models................................... 41
Replacing Spark/sense Electrode................................... 41
Electronic Components - N500 Models----------------- 42
Relighter - N500 Models .................................................... 43
Replacing Relighter ......................................................... 43
Flame Indicator - N500 Models ......................................... 43
Flame Indicator Replacement ......................................... 43
Electronic Components - N510 Models----------------- 43
Power Board - N510 Models ............................................. 43
Removal–Power Board .................................................... 43
Installation–Power Board ................................................. 43
Controls----------------------------------------------------------- 44
N500 Controls .................................................................... 44
Replacing Selector Switch - N500 ................................... 45
N510 Controls .................................................................... 46
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