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Norcold NON-TEK II SCQT 6406 User Manual

Norcold NON-TEK II SCQT 6406
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 NON-TEK II SCQT 6406 Specifications

General IconGeneral
BrandNorcold
ModelNON-TEK II SCQT 6406
CategoryRefrigerator
LanguageEnglish

Summary

Introduction

Model Designation

Explains Norcold refrigerator model naming conventions for RV/marine use.

General Information

Installation

Covers unit location, securing, and ventilation requirements for optimal performance.

Leveling

Discusses leveling requirements and the refrigerator's tolerance for off-level operation.

Power Sources

AC Power Connection

Details connecting the refrigerator to a 120 VAC grounded receptacle and power source requirements.

DC Power Connection

Explains connecting to a 12 VDC source, wire gauge, and polarity for proper operation.

Wire Size Table

Provides recommended wire sizes based on length for 12 VDC connections to prevent voltage drop.

Troubleshooting Procedures

Troubleshooting 120 VAC Operation

Step-by-step guide to diagnose issues when operating on 120 VAC power.

Troubleshooting 12 VDC Operation

Detailed steps to troubleshoot problems encountered during 12 VDC operation.

Potential Operating Problems

Identifies common issues like continuous running with no cooling, and their likely causes.

Checking a Circuit Breaker

Instructions for testing a circuit breaker using a VOM for continuity and overload function.

Checking the Chatter Protector

Procedure to test the chatter protector's resistance and diode function with a VOM.

Checking Thermostat Continuity

How to test thermostat continuity in both ON and OFF positions using a VOM.

Checking the Relay

Method to test relay coil voltage and contact continuity for proper operation.

Checking Transformer Primary Windings

Guides testing the primary windings of the transformer for correct resistance.

Checking Transformer Secondary Windings

Instructions for measuring secondary winding resistance on 40 and 60-watt inverters.

Checking for Defective Inverter or Oscillator

Details voltage checks at the compressor to diagnose inverter or oscillator faults.

Checking Compressor Continuity

Procedure to measure compressor winding resistance using a VOM for continuity.

Compressor Current Measurement

Specifies correct current readings for 40 and 60-watt units on 120 VAC and 12 VDC sources.

Compressor Voltage Measurement

Lists expected voltage readings at the compressor for 40 and 60-watt units under different sources.

DE-828 Circuit Diagram

DE-704C Circuit Diagram

DE-728 Circuit Diagram

DE-728 Refrigerator/Freezer Circuit Diagram

DE-400C Circuit Diagram

DE-250F, DE-251D Circuit Diagrams

DC-254 Circuit Diagram

DC-230 Circuit Diagram

MRFT-615B, MRFT-630B, MRFT-640B Circuit Diagrams

MRFT-660 Circuit Diagram

SRBD-630, TRBD-630 Circuit Diagrams

SCQT-6406 Circuit Diagram

SCQT-6800 Circuit Diagram

V2000 Circuit Diagram

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