Dometic RM1303 and Manuale di Servizio

DometicOS1160A 11/88A-lDometicAES REFRIGERATORDIAGNOSTIC SERVICEMANUALThe Dometic CorporationCorporate Office 2320 Industrial ParkwayElkhart, In. 465

(5)Shown here is the RM1303 that is one of the models that make up thefirst generation A.E.S. refrigerators. The models in this series includefrom the

(9)It must be remembered that a DC wire hook-up to the terminal block is required for anyA.E.S. refrigerator to operate on 120 volts AC,12 volts DC or

(13)Just above the burner assembly, located in thegenerator section of the cooling unit, are the12 volt DC and 120 volt AC heating elementsthat provid

(17)This component replaces the piezo lighterthat has been used on Dometic manuallycontrolled refrigerators for several years. Whenthe automatic contr

(21)To let the customer know that the switch isproperly turned on and that there is sufficientDC power to energize the system, L.E.D. lampwill illumin

(25)When the driver gets in the vehicle and turnson the ignition key, the gas flame will shut offand the 12 volt heating element will beenergized to o

(29)NOTE: The 120 volt mode is not affected bythe delay cycle. Any time the refrigerator issupplied with 120 volts AC the unit will beTHE 120 VOLT MOD

(33)As we stated earlier, in normal operation theL.E.D. lamp will illuminate green.(34)On the LP gas mode, if a proper gas flame isnot established wit

(36)Second, the control system incorporates a lowbattery protection circuitry that will prevent atotal lack of cooling due to a gradual loss of 12volt

(39)The last feature that we need to discuss is theoperation of the thermostat on the LP gasmode. Unlike the manually controlled models,A.E.S. refrige

TABLE OF CONTENTSDiagnostic Flow ChartsNo Operation . . . .No 120V AC Operation .No 12V DC Operation .No Gas Operation. . .Operation and DiagnosisDome

(42)The L.E.D. lamp assembly contains twoseparate diodes, one green and one red that arean integral part of the switch.(43)From the interior of the re

(46)Here we see the cut-off valve and the printedcircuit board and its connections.(47)Next, we can view the igniter-reigniter, DCrelay and just below

From the front there are two notable dif-ferences. The front upper decoration housesthe mode switches as well as the L.E.D. lampindicators that can gi

(54) The customer can manually select the controlsto operate on AC and LP gas only; again withAC having priority over the LP gas mode orthe customer

(57)If the gas only pushbutton is depressed thelamp will illuminate green and the refrigeratorwill only operate on the LP gas mode, even if q 120 or

If the coach pulls into a gasoline station andthe refrigerator is in a safety delay, the clocksyymbol will illuminate.(61)(62)Finally, if the unit is

(64)Another significant change in the thirdgeneration A.E.S. system is how the 12 voltheating element mode operates. As with thefirst and second gener

(67)If at any time while traveling the DC voltagereaches the approximate 13.3 threshold, the LPgas flame will shut off and the 12 volt heatingelement

(70)TAG LINE ENERGIZEDSecondly, suppose a customer has a properlywired RM3801 in a motor home that isequipped with a fully functional alternator.After

(73)If at any time the battery regains itself to theapproximate 13.3 volt threshold during the 12volt cooling mode, the controls will againreengage th

A.AES REFRIGERATORDIAGNOSTIC FLOW CHARTNO OPERATIONCheck supply voltage.1. Polarity2. Battery supply3. Wire sizeCorrect coach wiringas necessary.(see

(77)For proper cooling on the AC mode, the ACvoltage to the refrigerator should not varymore than 10 percent from the voltage ratingon the heating ele

RATED VOLTAGE ONHEATING ELEMENT AC OPERATIONAL RANGE110V99- 121VAC115V103.5 -126.5V AC120v 108- 132VACA-6-24

As seen in the chart on page A-6-26, thegauge of wire required to the positive andnegative connections on the terminal block willdepend on the size of

RECOMMENDED WIRE GAUGE AND LENGTH FORAES MODEL REFRIGERATORSAWG Maximum Wire LengthRM3500 RM3600 RM3800RM663 RM763 RM130310 19 ft. 13 ft. N/A8 31ft. 2

REFRIGERATORTERMINAL BLOCKPOSITIVE NEGATIVEA-6-27

AES REFRIGERATOR TECHNICAL DATA1ST GENERATION MODELSMODEL COOLING UNITNO. PART NO.RM 663 928 360900/7CORRECTFLOW A/C HeaterORIFICE SIZE &METER BTU

PROPER WIRING OF AN AES WITH A BATTERY CONVERTERREFRIGERATORTERMINAL BLOCK0-CONVERTER0+12V BATTERYA-6-29

(84)If the 12 volt circuit is wired as shown on pageA-6-31, the battery will not be able toproperly filter the converter voltage. Thiscould cause erra

TERMINALSTRIP(Buss Bar)REFRIGERATOR\TERMINAL BLOCKUNACCEPTABLE CONNECTION FOR AN AESA-6-31

(88)If the refrigerator has not been used for sometime or if the main supply tanks have justbeen refilled, air may be trapped in the LPsupply lines. T

AES REFRIGERATORDIAGNOSTIC FLOW CHARTA.NO 120V AC OperationCheck supply voltage.1. Polarity2. Battery supply3. Wire sizeNOTOKCorrect coach wiringto A-

(92)The first step to take is to insure that the 12volt DC power supply and it’s associatedwiring is providing the proper DC voltage tooperate the ele

(96)Check the 3 amp. DC fuse at the rear pro-tection cover. If it is blown, check the 12 voltwiring on the coach and refrigerator fordamage and repair

Remove the two thermostat leads and placethem together using electrical tape. This willby-pass the thermostat from the electricalcircuit. If the refri

(103)Refer to the RM3801 switch diagnosistroubleshooting section of the A.E.S.Diagnostic Manual for a detailed explanationon how to troubleshoot these

(107)As in all of our troubleshooting steps, theprinted circuit board is the last component tocheck for a failure. Insure that all of theconnections o

(111)After we have determined that the correct ACand DC power is available to the refrigerator,we need to diagnose the 120 volt heatingelement. Genera

(115)Do not diagnose the heating element bychecking only for continuity. A continuityDO NOT DIAGNOSE THEcheck does not properly check the integrity of

(118)Next, diagnose the switch by following theswitch diagnosis section of the A.E.S. manualwhich we have previously discussed. As a finalcheck in our

(121)When beginning to diagnose the heatingelement circuit, keep in mind that anapproximate DC voltage of 13.3 to theterminal block is required to eng

(125)DC voltage should not be present betweenterminals 85 and 87 on the relay when theignition key is disengaged. If voltage is presentat these termin

AES REFRIGERATORDIAGNOSTIC FLOW CHARTA.NO 12 VOLT DC OPERATIONCheck supply voltage1. Polarity2. Battery supply -Correct coach wiring as necessary(see

(129)Measure resistance across the leads as outlinedearlier in our program for the 120 volt heatingelement. The reading, however, will bedifferent fro

(132)To diagnose a gas operational problem be surethe refrigerator is in the A.E.S. mode.(133)The first diagnostic step is to be sure there areproper

(136)Now hook up a manometer to the test fittingand leave it in place until all checks have beenmade for gas operation. Turn the shut-offvalve and ref

(139)You should hear a sharp click from thesolenoid and now obtain a gas pressurereading. If these results are not realized thesolenoid is defective a

(143)The next diagnostic step is to turn the unit offand then remove the high voltage wire fromthe igniter. When the unit is turned on youshould hear

(147)A very important function of the igniterassembly is to measure the condition of theflame. The flame completes the high voltagecircuit and the spa

(151)If you require additional service assistance thebasic requirements for the cooling unitoperation or the A.E.S. control system, pleaserefer to our

AES RefrigeratorGLOSSARY OF TERMSA E S Automatic Energy Selector Refrigerators. First introduced in 1983, the 1st and 2nd generation series will aut

AES Refrieerator GLOSSARY OF TERMS continuedELECTRODE - The angular piece of metal located just above the burner that is connected to thehigh voltage

AES Refrigerator GLOSSARY OF TERMS continuedINDICATOR LAMP(S) - Consisting of light emitting diode(s) (L.E.D.) the 1st and 2nd generationseries refrig

AES REFRIGERATORDIAGNOSTIC FLOW CHARTNO GAS OPERATION1Check supply voltage1. Polarity2. Battery3. Wire sizet-iCorrect coach wiring asnecessary (see pg

AES Refrigerator GLOSSARY OF TERMS continuedMAIN SWITCH (1st Generation) - A rotary, two (2) position switch used to complete or interruptmain power c

AES Refrigerator GLOSSARY OF TERMS continuedSWITCH/MODE INDICATOR BOARD (3rd Generation) - A more sophisticated version of theswitch board. This switc

AES Refrigerator GLOSSARY OF TERMS continuedTHERMO-ELECTRIC SOLENOID VALVE - This device directly replaces the safety valve assemblyfound on the manua

AES Refrigerator GLOSSARY OF TERMS continuedapproximately 1lV DC, the refrigerator will disengage the 12V heating element and initiate anapproximate d

AES RefrigeratorCONTINUITY READINGS FOR SWITCH CARD & HARNESSModel 3801The following is a list of checks that should be made on the switch card an

AES Refrigerator CONTINUITY READINGS FOR SWITCH CARD & HARNESS continued5. AC/GAS FUNCTION LAMPMeasure resistance between the brown terminal on th

AES Refrigerator CONTINUITY READINGS FOR SWITCH CARD & HARNESS continuedIO. DELAY MODE LAMP AND SWITCHA. With the mode switch manually depressed,

AES Refrigerator CONTINUITY READINGS FOR SWITCH CARD & HARNESS continuedModel 2802The following is a list of checks that should be made on the swi

AES Refrigerator CONTINUITY READINGS FOR SWITCH CARD & HARNESS continuedB. With the gas function switch NOT depressed, no continuity should be ind

Operation of the AES System (Automatic Energy Selector)The control system on the AES selects the most suitable energy source. The selectionwill be mad

AES REFRIGERATORDIAGNOSTIC FLOW CHARTNO GAS OPERATION (continued)G.OKCheck solenoidNOTOKReplace solenoid asnecessary (see pgs.A-6-45 to A-6-46,para.

Bulletin #46 continuedThe circuit board on the AES also has the ability to monitor the 12 volt supply voltage.If the incoming voltage to the refrigera

Bulletin #46 continuedThe thermostat used in the AES system is a normalelectric thermostat without an off position. It operateson low voltage from the

Bulletin #46 continuedMAIN SWITCHON/OFF SWITCHRM1303, 763, 663Models 1303, 763 663:The switch operates on 12 volts from the circuit board. In normal o

Bulletin #46 continuedIn closing,there are two more external parts that can cause problems with your AESrefrigerator. First, if your propane supply to

AES REFRIGERATOR WIRING DIAGRAMS663RMCIRCUIT B oardRELAYTerminal BlcokHEATERCONNECTORSMAIN SWITCHGAS FLAME Warn. LampRM763@ THERMOSTAT@- GAS VALVE CO

AES REFRIGERATOR WIRING DIAGRAMSRM1303@ CIRCUIT B oard RELAY TERMINAL BlockHEATER CONNECTORS@)- MAIN SWITCH@ GA5 FLAME Warn. Lamp H10 F EIO G+--i

CIRCUIT BOARDDIAGNOSIS6/1. IF THIS LEAD IS DAMAGED: LOOK FOR A SHORT CIRCUIT OR DAMAGE INTHE INTERIOR LIGHT CABLE.2. IF THIS LEAD IS DAMAGED: LOOK FOR

ometiclquality leisure line productrAUTOMATIC ENERGY SELECTOROur technicians continue to getcalls from the field regarding theflashing red light on th

Replacement of Circuit3-WAY AES CIRCUIT BOARDSRM3500,3600,3800When working on an AES style refrigerator andreplacing the circuit board, the old board

Bulletin #R56/7A continued3-WAY AES CIRCUIT BOARDSRM3501,3601,3801,4801Check the old circuit board before installing anew one. If damages as shown bel

OPERATION AND DIAGNOSISDOMETIC AES REFRIGERATORSA-6- 1

Bulletin #R56/7A continued2-WAY AES CIRCUIT BOARDSRM2602 ANDRM2802 Check the old circuit board before installing anew one. If damages as shown below a

REPLACEMENT OF CIRCUIT BOARDSModels: RM663 RM763 RM1303RefrigeratorBulletin R58/7AApril 1987 Rev. 5/87When replacing the circuit board in the 663, 763

Bulletin #R58/7A continuedb. Verify thatthe positive (+) 12V. DC wire going to the circuit board is connected directlyto the coachbattery positive (+)

Bulletin #R58/7A continuedLastly, the moisture shield kit has been enclosed and can beinstalled to prevent corrosiondamage caused by water or car wash

AES MODELS RM3601 3801MODULEBOARDREPLACEMENTqD U O- THERM RefrigeratorBulletin R59/7AMay 1987NOTE:Please take full consideration of the followinginfo

PDI(PRE- DELIVERY INSPECTION)PDI insures safe operation of Dometic Refrigerators. The follow-ing checks on each unit are advised before being operate

Bulletin #R60/7A continuedThis refrigerator isequipped with an AutomaticEnergy Selector System. The selection will bemade with the highest priority to

Bulletin #R60/7A continuedAESNOTE:The above model numbers are upgradedversions of the AES system.Normal operation will be the same asfirst generation.

Bulletin #R60/7A continuedAESPRE-DELIVERY CHECK FORMODELS RM3601 AND RM38011. The AES automatically selects the best energy source for the situation,

Bulletin#R60/7A continued9.IO.1 1.12.When switch "B" is pushed, the control systemwill select only between 120 volts A/C andLP gas operation

(1)Welcome to the Dometic A.E.S. refrigerator training program. In this program we will discuss thefeatures, operating sequences and diagnostic proced

Bulletin #R60/7A continuedFREEDOM SERIESRM 2802(PDI) PRE-DELIVERY INSPECTIONPDI insures safe operation of Dometic refrigerators. The followingchecks

GENERAL INFORMATIONFOR MODELS RM2602 & RM2802The refrigerator is equipped with an Once the low voltage has been cor-energy selector system. The sy

AES REFRIGERATOR DIAGNOSTICSERVICE MANUALOS1160-AA-lA-2A-3A-4A-5-lA-5-2A-5-3A-5-4A-5-5A-6-lA-6-2A-6-3A-6-4A-6-5A-6-6A-6-7A-6-8A-6-9A-6- 10A-6-11A-6- 1

OS1160-A AES Refrigerator Diagnostic Service Manual (continued)A-6-47A-6-48A-6-49A-7-lA-7-2A-7-3A-7-4A-7-5A-7-6A-7-7A-8-lA-8-2A-8-3A-8-4A-8-5A-9- 1A-9

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