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Norcold DE 828 User Manual

Norcold DE 828
29 pages
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SERVICE MANUAL
DUAL ELECTRIC AND 12 VOLT REFRIGERATORS
NON-TEK II MODELS
DE 828
DE 704C
DE 728
DE 400C
DE 251D
DE 250F
DE 254
DC 230
MRFT 615B
MRFT 630B
MRFT 640B
MRFT 660
SRBD 630
TRBD 630
SCQT 6406
SCQR 6800
V2000
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Norcold DE 828 Specifications

General IconGeneral
BrandNorcold
ModelDE 828
CategoryRefrigerator
LanguageEnglish

Summary

INTRODUCTION

Purpose of Service Manual

Explains the manual's purpose for Norcold Dual Voltage and 12 Volt refrigerators.

Model Designation

Details Norcold Dual Voltage and 12 Volt refrigerator applications in RV/marine industries.

Terminology

Defines terms specific to Norcold Dual Voltage and 12 Volt refrigerators.

GENERAL INFORMATION

Installation

Covers unit location and ventilation requirements for the refrigerator.

Leveling

States that the refrigerator does not require critical leveling for cooling efficiency.

POWER SOURCES

AC Power Connection

Instructions for connecting the 120 VAC power cord to a grounded receptacle.

DC Power Connection

Details connecting the 12 VDC power source to the refrigerator's terminal box.

Wire Size Table

Provides recommended wire sizes for field-supplied DC cords based on length and wattage.

TROUBLESHOOTING PROCEDURES

120 VAC Operation Troubleshooting

Step-by-step troubleshooting for 120 VAC operation issues.

12 VDC Operation Troubleshooting

Troubleshooting steps for 12 VDC operation problems.

POTENTIAL OPERATING PROBLEMS

Continuous Operation, No Cooling

Discusses causes and solutions for continuous compressor operation without cooling.

Intermittent AC Operation

Identifies shorted oscillator transistors as the cause for intermittent AC operation.

Abnormal Noise

Lists potential causes for loud noises during refrigerator operation.

Excessive Frost Build-Up

Explains how to address excessive frost buildup on the evaporator.

No Cooling After Initial Start-Up

Provides steps for troubleshooting no cooling after initial installation.

CIRCUIT BREAKER TESTING

VOM Testing Procedure

Instructions for testing a circuit breaker using a VOM.

CHATTER PROTECTOR TESTING

VOM Testing Procedure

Instructions for testing the chatter protector using a VOM.

THERMOSTAT TESTING

Continuity Check

Instructions for testing thermostat continuity with a VOM.

RELAY TESTING

Operational Check

Instructions for testing a relay's coil and contacts using a VOM.

TRANSFORMER PRIMARY WINDINGS TESTING

Resistance Check

Instructions for checking transformer primary winding resistance.

TRANSFORMER SECONDARY WINDINGS TESTING

Resistance Check

Instructions for checking transformer secondary winding resistance.

INVERTER OR OSCILLATOR TESTING

Output Voltage Check

Procedure to check inverter/oscillator output voltage with a VOM.

COMPRESSOR CONTINUITY TESTING

Resistance Check

Instructions for checking compressor continuity with a VOM.

COMPRESSOR CURRENT MEASUREMENT

Amperage Check

How to measure compressor current using an ammeter.

COMPRESSOR VOLTAGE MEASUREMENT

Voltage Check

How to measure compressor voltage with a VOM.

CIRCUIT DIAGRAM: DE-828

Power Supply, Oscillator, Transformer

Details components for DE-828 refrigerator power and oscillator systems.

CIRCUIT DIAGRAM: DE-704C

Power Supply, Oscillator, Transformer

Details components for DE-704C refrigerator power and oscillator systems.

CIRCUIT DIAGRAM: DE-728

Power Supply, Inverter, Transformer

Details components for DE-728 refrigerator power, inverter, and transformer systems.

DE-728 CIRCUIT DIAGRAM NOTES

Transformer Replacement Guidelines

Provides conversion notes for U-64A to U-65A-70 transformer replacement.

CIRCUIT DIAGRAM: DE-400C

Power Supply, Oscillator, Transformer

Details components for DE-400C refrigerator power and oscillator systems.

CIRCUIT DIAGRAM: DE-250F, DE-251D

Power Supply, Oscillator, Transformer

Details components for DE-250F/DE-251D power, oscillator, and transformer systems.

CIRCUIT DIAGRAM: DC-254

Power Supply, Oscillator, Transformer

Details components for DC-254 refrigerator power, oscillator, and transformer systems.

CIRCUIT DIAGRAM: DC-230

Power Supply, Oscillator

Details components for DC-230 refrigerator power and oscillator systems.

CIRCUIT DIAGRAM: MRFT-615B, MRFT-630B, MRFT-640B

Power Supply, Oscillator, Transformer

Details components for MRFT models power, oscillator, and transformer systems.

CIRCUIT DIAGRAM: MRFT-660

Power Supply, Inverter, Transformer

Details components for MRFT-660 refrigerator power, inverter, and transformer systems.

CIRCUIT DIAGRAM: SRBD-630, TRBD-630

Power Supply, Oscillator, Transformer

Details components for SRBD/TRBD models power, oscillator, and transformer systems.

CIRCUIT DIAGRAM: SCQT-6406

Power Supply, Oscillator, Transformer

Details components for SCQT-6406 refrigerator power, oscillator, and transformer systems.

CIRCUIT DIAGRAM: SCQT-6800

Power Supply, Oscillator, Transformer

Details components for SCQT-6800 refrigerator power, oscillator, and transformer systems.

CIRCUIT DIAGRAM: V2000

Power Supply, Oscillator, Transformer

Details components for V2000 refrigerator power, oscillator, and transformer systems.

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