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TOTROUBLESHOOT

ERRATIC CHECK LIGHT (GAS)

Dometic@

on AMES/AES Refrigerators

REFRIGERATOR

with 2931842XXX

BULLETIN

R70/4B

2931843XxX Power Modules

March 1995

INTRODUCTION

The purpose of this Bulletin is to aid the servicer in proper diagnosis and repair of AMEW/AES refrigerators. This

Bulletin will provide the servicer with information to find the hidden variables that can cause an erratic check light

when the refrigerator is operating on gas.

PARTS AND TOOLS REQUIRED:

QUICK-CHECK TROUBLESHOOTING LIST

PAL@

Tester

Millivolt Meter

Volt-Ohm Meter

Manometer/Gas Pressure Gauge

Pliers

Screwdrivers

3108702.675 Kit, Wire Harness 7, 11

12 Series,

Silhouette

S15XX,

S16XX,

S18XX Series

3108702.683 Kit, Wire Harness RM7030

RM7130

DC Power Supply

Gas Supply

Components:

A. Thermocouple

B. Burner

C. Reignitor

D. Electrode

E. Solenoid

F. Power Module

G. Control Panel

Grounds

Installation of 3108702.675 or 3108702.683

Wire Harness Kit

DETAILED TROUBLESHOOTING LIST

1. DC POWER SUPPLY

Clean Direct Current (DC) power is mandatory for high-

tech circuits to operate as designed. The sources for DC

power are a battery and a converter.

A battery will provide straight line DC power, but extended

operation will require recharging of the battery by the

converter or the alternator.

The converter and alternator produce DC power by a series

of diodes that rectify alternating current to DC. A battery or

capacitors can be used to clean up the AC ripple that is

present after AC voltage has been rectified.

AC ripple can be measured by a digital voltmeter set on the

AC scale at the main terminal block connections. Six volts

AC or less is acceptable. See FIG. 1.

A brief interruption of the DC power supply while refrigera-

tor is operating on gas can cause a check light; for

example:

Turning the refrigerator OFF-ON while operating in

the gas mode can cause a check light. The switching

of relays from converter power to battery power when

unplugging from shore power or shutting down of the

generator could interrupt DC power long enough to

cause a check light.

The thermocouple produces 25-30 MVDC when operat-

ing. When DC power is interrupted and restored, the

thermocouple may not have sufficient time to cool. If the

power module sees above 6 MVDC, when power is

restored the power module will assume a problem in the

gas mode and immediately turn on the check light.

MAIN TERMINAL BLOCK

FIG.

Form No.

3106465.002 4/95

Dometic

Corp.

LaGrange,

IN 46761

Manual Compliments of

Northwest RV Supply

Printed From

http://www.nwrvsupply.com

1 2 3 4 5 6 7 8 9 10

Inhaltsverzeichnis

Seite 1 - http://www.nwrvsupply.com

TOTROUBLESHOOTERRATIC CHECK LIGHT (GAS)8) Dometic@on AMES/AES RefrigeratorsREFRIGERATORwith 2931842XXX & BULLETIN R70/4B2931843XxX Power ModulesMa

Seite 2

This Manual is Compliments of Northwest RV Supply 86325 College View Road Eugene, OR 97405 Local: 541-746-9092 Toll-Free: 866-678-7467 Fax: 541-736

Seite 3

2. GAS SUPPLYThe refrigerator requires 11 inches water column with halfof all the BTU’s of the RV turned on (half of all aDubancesturned on). With all

Seite 4

Installing the Channel Mark 6, Model 12E, rated 25 MAcan result in failure to ignite on gas if the DC powersupply is below 12.5 volts DC. The reignito

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2)With main ON/OFF switch on the control panelin the ON position:Check for DC voltage at P1 Terminal 4 on thepower module. See FIG. 6. It should be wi

Seite 6

G.H.I.J.K.Connect the end of the white wire from P3 (twowhite wires spliced into spade terminal) to the 6-terminal ground bus. See FIG. 7.Connect the

Seite 7

120 VOLTS ACd*@ E:it\‘A BsooAARRpD 'DqYiFAvc3---THERMISTOR@ GAS VALVE@- REIGNITEI?@ THERMOCWPLEo-ELECTRODE@ RETAINER FOR BURNER*@ :riAAALL BSLTDR

Seite 8

120 VOLTS ACVY.-me.u.-L=YI-@ %::TT it?:0 ::;:AY@---THERMISTOR@ GAS VALVE@---RE IGNITER@ THERMOCOUPLE@-- ELECTROOE@ RETAINER FCf7 BURNER@- TERMINAL BLO

Seite 9

293 2 1 56 1 2&@.+ABSORPTION UNITTERMINAL BLOCKRETAINER FORCIRCUIT BOARD POWERE@ TEST POINTCHASSIS GROUNDIlr---1i93 21 77-001 3 1CIRCUIT BOARD POW

Seite 10

CIRCUIT BOARD POWERCIRCUIT BOARD DISPLAYTHERMISTORGAS VALVERE IGNITERTHERM0C0UPLEELECTRODERETAINER fC+? BURNERTERMINAL BLOCKTERMINAL STRIPABSORPTION U

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