DIAGNOSTIC SERVICE MANUAL - Nancy Emmert

1 DIAGNOSTIC SERVICE MANUAL AMERICANA & AMERICANA PLUS RM 2351, RM 2354, RM 2451, RM 2454 RM 2551, RM 2554, RM 2652, RM 2662 RM 2663, RM2852, RM2862 & NDR1062 USASERVICE OFFICED ometic Corporation2320 Industrial ParkwayElkhart, IN 46516574-294-2511 CANADAD ometic Distribution46 Zatonski Unit 3 Brantford, Ontario CANADA N3T 5L8519-720-9578 For SERVICE CenterAssistance Call:800-544-4881 Form No. 02/07 2007 Dometic CorporationLaGrange, IN 467611 Safety InStructIonSThis MANUAL has safety information and instruc-tions to help users eliminate or reduce the risk of accidents and Safety InformatIonThis is the safety-alert symbol. When you see this symbol in this MANUAL , be alert to the potential for personal recommended precautions and safe op-erating SIgnal WordSA signal word , WarnIng OR cautIon is used with the safety-alert symbol. They give the level of risk for potential injury.

2 Indicates a potentially hazard-ous situation which, if not avoided, could result in death or serious injury. Indicates a potentially hazard-ous situation which, if not avoided may result in minor or moderate injury. When used without the safety alert symbol indicates, a potentially hazardous situation which, if not avoided may result in prop-erty and follow all safety information and SERVICE MANUAL is the result of the dedica-tion of The Dometic Corporation Technical staff and its engineers in giving SERVICE people the necessary instruction for making accurate analy-ses of certain conditions. Provided is a diagnos-tic chart leading a qualified mechanic into the SERVICE MANUAL pages to locate and solve symp-toms which may occur. Dometic has continued its commitment in providing SERVICE people with this, the most up-to-date information about ser-vicing Dometic RV floW 4contentSSectIon 1oPeratIon Refrigerator Operation.

3 6 SectIon 2ac Voltage AC Voltage ..9 SectIon 3ac comPonentS Heating Element ..10 SectIon 4dc Voltage DC Voltage Requirements ..10 SectIon 5dc comPonentS DC heating Element ..11 Thermistor ..11 Solenoid ..11 Igniter ..11 High Voltage Cable ..12 Electrode ..12 DC Relay ..12 Upper Circuit Board ..13 Lower Circuit Board ..13 Door Switch ..18 Climate Control Heater & Switch ..18 Low Ambient Switch ..18 Fuses ..18 Thermofuse ..18 SectIon 6lP gaS LP Gas Requirements ..19 SectIon 7lP gaS comPonentS MANUAL Gas Shut-Off Valve ..19 Orifice ..19 Thermocouple ..20 Burner ..203 Page 7 Flue Flue Cap ..20 Flue Tube ..20 SectIon 8coolIng unIt ..21 Ventilation ..21 Air ..23 Interior Liner Seal to Frame ..23 Door Position.

4 24 Ambient Temperature ..24 Cooling Unit ..25 Food Storage ..26 High Humidity ..26 SectIon 9 WIrIng Internal ..26 External ..26 Wiring ..26 SectIon 10 Ice maKer ..26 Mold ..27 Ice ..27 Mold ..27 Shut Off ..27 Mold ..27 Timing ..28 Water Valve ..28 Ice Maker ..28 Water Fill ..28 Water ..29 Wiring No operation - no panel lights2. No operation - has panel lights3. No AC operation - operates on gas mode4. No Gas operation - operates on AC mode5. Insufficient cooling on all Insufficient cooling on AC - cools properly on gas Insufficient cooling on Gas - cools properly on AC & PAGE1, page 064, page 105, page 189, page 265, page 135, page 131, page 064, page 105, page 119, page 265, page 141, page 072, page 095, page 193, page 119, page 245, page 131, page 066, page 197, page 195, page 115, page 125, page 125, page 119, page 245, page 138, page 218, page 218, page 248, page 235, page 118, page 252, page 093, page 105, page 136, page 197, page 197, page 207, page 207, page 205, page 131, page 065, page 125.

5 Page 14 CAUSEO perationDC VoltsFuseWiringUpper Circuit BoardLower Circuit BoardOperationDC VoltsThermistorWiringLower Circuit BoardOperationAC VoltsFuseHeating ElementWiringLower Circuit BoardOperationLP GasManual Gas ValveIgniterHigh Voltage CableElectrodeSolenoidWiringLower Circuit BoardVentilationLevelingAmbient TemperatureAir LeaksThermistorCooling UnitAC VoltsHeating ElementLower Circuit BoardLP GasOrificeFlue BaffleFlue TubeBurnerLower Circuit BoardOperationThermistorLower Circuit BoardThis program will address the most common system problems associated with the RM2351, RM2354, RM2451, RM2454, RM2551, RM2554, RM2652 ,RM2662,RM2663,RM2852and RM2862 refrigerators supplied by The Dometic Corporation. Our intent is to provide you with a guideline of checks to make, should you encounter one of the following Check light on10. Interior light on when door is closed11.

6 Rapid formation of frost12. Water on frameSECTION & PAGE4, page 109, page 266, page 197, page 195. page 117. page 197. page 207. page 205. page 139. page 265. page 185. page 188. page 248. page 268. page 238. page 268. page 238. page 238. page 268. page 235. page 18 CAUSEDC VoltsWiringLP GasManual Gas ValveSolenoidOrificeBurnerThermocoupleLo wer Circuit BoardWiringLow Ambient SwitchDoor SwitchDoor PositionFood StorageInterior Liner to FrameHigh HumidityAir LeaksInterior Liner to FrameHigh HumidityAir LeaksClimate Control Heater6amerIcana 2-Way model1. Main Power Button ON/OFF2. AUTO/GAS Mode Selector ButtonA. AUTO Mode indicator lampB. CHECK indicator lamp (Gas Mode Only)C. Climate control switch only on RM2652 & RM2862dISPlay Panel rm2351, rm2451, rm2551, rm2652, rm2852 auto temPerature controlRM2652 & RM2852RM2662 & RM2862RM2451 & RM2551 RM2351 Travel Latchrefrigerator control PanelSectIon 1refrIgerator oPeratIon7 Travel LatchRM2354RM2454 & RM2554 dISPlay Panel rm2354, rm2454, rm2554 rm2663 3-waydISPlay Panel rm2662, rm2862 2-Way3-Way1.

7 Main Power Button ON/OFF2. DC Mode Selector Button3. AUTO/GAS Mode Selector Button4. Temperature Selector ButtonA. DC Mode Indicator LampB. AC Mode Indicator LampC. GAS Mode Indicator LampD. AUTO Mode Indicator LampE. CHECK Indicator Lamp (Gas Operation Only)F. Temperature Indicator Lampsrefrigerator control Panels3-Way 2-Way2-Way1. Main Power Button ON/OFF2. AUTO/GAS Mode Selector Button3. Temperature Selector ButtonB. AC Mode Indicator LampC. GAS Mode Indicator LampD. AUTO Mode Indicator LampE. CHECK Indicator Lamp ( GAS Mode Only)F. Temperature Indicator Lamps8most lP gas appliances used in recreation-al vehicles are vented to the outside of the vehicle. When parked close to a gasoline pump, it is possible that the gasoline fumes could enter this type of appliance and ignite from the burner flame, CAUSING A FIRE OR an your Safety, when refueling, shut off all lP gas appliances which are vented to the InStructIonSImPortance of leVelIng arefrIgeratorIn an absorption refrigerator system, ammonia is liquefied in the finned condenser coil at the top rear of the refrig-erator.

8 The liquid ammonia then flows into the evaporator (inside the freezer section) and is exposed to a circulat-ing flow of hydrogen gas, which causes the ammonia to evaporate, creating a cold condition in the freezer. When starting this refrigerator for the very first time, the cooling cycle may require up to four hours of running time be-fore the cooling unit is fully operational. The tubing in the evaporator section is specifically sloped to provide a con-tinuous movement of liquid ammonia, flowing downward by gravity through this section. If the refrigerator is oper-ated when it is not level and the vehicle is not moving, liq-uid ammonia will accumulate in sections of the evaporator tubing. This will slow the circulation of hydrogen and am-monia gas, or in severe cases, completely block it, result-ing in a loss of cooling. Any time the vehicle is parked for several hours with the refrigerator operating, the vehicle should be leveled to prevent this loss of cooling.

9 The ve-hicle needs to be leveled only so it is comfortable to live in (no noticeable sloping of floor or walls). When the vehicle is moving, the leveling is not critical, as the rolling and pitching movement of the vehicle will pass to either side of level, keeping the liquid ammonia from accumulating in the evaporator tubing. oPeratIonBefore starting the refrigerator, check that all the MANUAL gas valves are in the ON position. DO NOT forget the MANUAL shutoff valve on the rear of the refrigerator. This refrigerator is equipped with a control system which can be set to automatically select either 120 volt AC or LP gas operation (AUTO mode), or if desired LP gas only (GAS mode) or DC volts (DC Heater) where thermostatIn both AUTO mode and GAS mode operation, the tem-perature is controlled by a factory preset temperature set-ting.

10 The refrigerator controls will work down to volt continuous 12 volt DC supply must be available for the electronic control to the main power ON/OFF button (1) to the DOWN AUTO mode, the AUTO lamp D will be illuminated. The control system will automatically select between AC and GAS operation with AC having priority. Tem-perature is selected by the GAS mode operation, the GAS lamp C will be illu-minated and only operate on LP only. Temperature is selected by DC mode, the DC lamp A will be illuminated and the unit will only operate on DC until DC volts drops below continuous 12 volt DC supply must be available for the electronic control to the main power ON/OFF button (1) to the DOWN AUTO mode, the AUTO lamp A will be illuminated. The control system will automatically select between AC and GAS operation with AC having priority.