Home

Dometic Rm7030/Rm7732 Refrigerators Service Manual

Contents

1. S R ce 22 DIAGNOSTIC SERVICE MANUAL DOMETIC RM7030 RM7732 Refrigerators TYPICAL WIRING DIAGRAM FOR RM7030 PRODUCT NO 921890401 1 B feos TT A As MHITE EEE ct Tp O OL B3 YELLOW ON LN 3 BLUE HR QA 120 VOLTS AC N N M WHITE 2 BLACK 3 GREEN 4 GREEN ELLOW Ko 5 GREY 6 BROWN 7 BLUE A CIRCUIT BOARD POWER H RETAINER FOR BURNER O FUSE 3A CIRCUIT BOARD DISPLAY D TERMINAL BLOCK P FUSE 5A O THERMISTOR J TERMINAL STRIP Q _ HEATING CABLE D GAS VALVE K ABSORPTION UNIT R SWITCH E REIGNITER L SWITCH S TERMINAL BLOCK FP THERMOCOUPLE M LIGHT T TERMINAL BLOCK G ELECTRODE N HEATER 120V AC U RETAINER FOR CIRCUIT BOARD POWER 23 DOME TICL RM7030 RM7732 DIAGNOSTIC SERVICE MANUAL Refrigerators RM7732 TYPICAL WIRING DIAGRAM 293 27 57 CIRCUIT BOARD POWER CIRCUIT BOARD DISPLAY THERMISTOR GAS VALVE REIGNITER THERMOCOUPLE ELECTRODE RETAINER FOR BURNER TERMINAL BLOCK TERMINAL STRIP ABSORPTION UNIT SWITCH LIGHT HEATER 120V AC FUSE 3A FUSE 5A HEATING CABLE 120 VOLTS AC SWITCH TERMINAL BLOCK RETAINER FOR CIRCUIT BOARD POWER Q TEST POINT e leelelelcielsic se WHITE BLACK GREEN GREEN YELLOW GREY BROWN BLUE YELLOW slelelel 24 roncnosne SERVICE MANUAL SECTION 9 OTHER 9 1 LEVELING In an absorption refrigera
2. THERMOSTAT OFF SWITCH pl MOLD HEATER Once again after a few degrees of rotation the timing cam closes the holding switch providing a circuit to 4 the motor that will assure completion of this revolution The mold heater remains energized The shut off arm will raise and lower again operating its switch The ice that was ejected during the first revolution is dumped into the storage bin 115 VOLTS 60 CYCLE SHUT OFF switcH THERMOSTAT MOLD HEATER revolution the mold heater resets the thermostat At this time the mold heater is de energized If the storage bin is full the shut off arm will remain in a raised position Some time during the second y 33 DOME TICL RM7030 RM7732 Refrigerators 115 VOLTS 60 CYCLE THERMOSTAT SHUT OFF SWITCH MOLD HEATER Near the completion of the second revolution the timing cam again closes the water valve switch This time a circuit is completed through the water valve solenoid its switch and the mold heater The water valve solenoid received about 105 volts The remaining 10 volts to the mold heater are not noticeable When the water valve solenoid is energized the valve opens and water refills the mold 115 VOLTS 60 CYCLE THERMOSTAT SHUT OFF SWITCH MOLD HEATER HOLDING SWITCH The ejection cycle ends the moment that the hoiding switch is switched by the timing cam The water valve switch is also opened If the storag
3. reinstall the flue baffle and flue cap SECTION 8 WIRING 8 1 EXTERNAL WIRING A 120 Volts AC Connection The refrigerator is equipped with a three prong grounded plug for protection against shock hazards and should be plugged directly into a properly grounded three prong receptacle Do not cut or remove the grounding prong from this plug Wiring diagrams continued on next page 21 MO TIJA N3389 NO T13A N3389 YO N3389 GE DIAGNOSTIC SERVICE MANUAL lt 0 10 OO e oe eee ee aa wg ge ap ag ag a A A atan ee akan ama amar amrih wemh e dia ee ee e da am ama arah ama eee ee aran ee eee ama aa ee ee MOV 18 UIH GOG 3Y1K 8H O9 HJLIMS ALIGIWNH 88 09YOA LINIYTI y3ddN HILIMS 3G0W dWw 7 300H SY9 LINN NOT 1dJOSOY dWY 1 300 AY 130 lt MONGOO e a ee wan kai kan m ak dAV 1 300H IV ANC dw 1 NOTLONAJ S3 HILIMS NOILINN3 S3Y dAY 1 NOLIONAY SY9 HILIMS NOILINN SYI a gt tu dWY1 NYVM SWY 14 SY9 dWY GI 3503 JWIL 431IN3133 JIdNDIYOWA JHL OI JAWA SY9 1W1SONY3HL LHII HILIMS 4000 HILIMS NIVH YOLISNNOI 431V3H AION IVNTINE3L1 08v08 1109413 TYPICAL WIRING DIAGRAM FOR RM7030 PRODUCT NO 921890201 amp 921890301 rAC J AC 4 gt TOO ANE qMOOWLOTHY a aaa aal y 9 nn Po ooo or re WIOTNSI SS E lt montdu O 3q none d LEA OO OO E i OE av ON N N X S mM S S Ly S Q 4
4. 10 Pin NOTE If the check on gas mode lamp and switch is not correct verify the wire harness has continuity If wire harness is good replace the upper circuit board RE rersnosne SERVICE MANUAL I GAS FLAME WARNING LAMP NOTE The following checks should be made on the upper circuit board and harness assemblyBEFORE replacing the upper circuit board or wiring harness The checks are to be done with the wiring harnessREMOVED from the lower circuit board and the OFF ON switch turned to ON Measure resistance between the brown terminal on the 10 pin connector negative 0 lead from meter to the black terminal on the 10 pin connector positive lead from meter The proper resistance is approxi mately 22 000 ohms NOTE If the check on gas flame warning lamp is not correct verify the wire harness has continuity If wire harness is good replace the upper circuit board 10 Pin J RM7030 Product No 921890401 and RM7732 NOTE The PAL tester will allow for proper testing of the integrity of the upper and lower circuit boards PAL Is available from your Dometic parts distributor NOTE Each of the following tests should be done according to pin locations The wire colors may vary With main ON OFF switch on display panel in OFF position Check for DC voltage at Plug 1 Terminal 4 and terminal 5 negative U DC on the lower circuit board If no voltage then check fuse condition Replace if blown Che
5. CHECKING THESE COMPONENTS BE SURE THERE IS NO POWER TO THE APPLIANCE ICE MAKER TYPICAL WIRING DIAGRAM MOUNTING PLATE MOLD SUPPORT RECEPTACLE TO CABINET WIRING BLACK BLUE OR BROWN SPLICE SS JE GROUND GREEN YELLOW 12 3 WATER SUPPLY To operate properly the water pressure in the water To remove trapped air loosen the connection at the supply line must be between 15 Ibs PSI and 125 lbs water solenoid valve of the appliance Ensure that PSI pressurized water is reaching this point and bleed off any air in the line Retighten the connection making Lower water pressure water turned off or obstructions sure there are no leaks or air in the water line can cause low or no ice produc tion First check to see that the water supply is fully turned on Visually check the line for kinks etc which might obstruct the flow of water 39
6. Ll operates on gas Operation 1 1 A AC Volts 2 Heating Element 3 Upper Circuit Board 5 8 B C Wiring 8 2 Thermostat 5 1 Lower Circuit Board 5 9 B 5 No Gas operation L operates on AC Operation 1 1 A LP Gas 6 Manual Gas Valve 7 1 Igniter 5 5 A High Voltage Cable 5 6 A Electrode 5 11 Solenoid 5 4 A Upper Circuit Board 5 8 B D E Wiring 8 2 Lower Circuit Board 5 9 C 6 Insufficient cooling on all modes Ventilation 9 2 Leveling 9 1 Ambient Temperature 9 5 Air Leaks 9 3 Thermostat 5 1 Cooling Unit 9 6 7 Insufficient cooling on AC U cools properly AC Volts 2 on gas Heating Element 3 DOME TICL RM7030 RM7732 Refrigerators SYMPTOM 8 Insufficient cooling on gas LI cools properly on AC 9 Freezes on all modes 10 Changes preset mode 11 Flame failure light within 10 seconds 12 Flame failure light after 3 minutes 13 Interior light ON when door is closed 14 Rapid formation of frost 15 Water on frame RM7030 Prod No 921890401 amp RM7732 16 No operation U no panel lights 17 No operation U has panel lights _ erenosne SERVICE MANUAL CAUSE REFER TO LP Gas Orifice Flue Baffle Flue Tube Flue Cap Burner Thermostat DC volts DC Volts Wiring Lower Circuit Board Igniter High Voltage Cable Electrode Wiring LP Gas Manual Gas Valve Solenoid Orifice Burner Wiring Thermocouple Wiring Door Switch Door Position Food Storage Interior Liner to Fra
7. RM7732 Refrigerators 5 11 ELECTRODE First do a visual check for cracks or breaks on the ceramic insulator Verify the mounting bracket is attached properly to the elec trode If either of the above is found replace the electrode The spark gap must be set at three sixteenths 3 16 of an inch and tip of electrode above the slots in the burner If igniter see Sec 5 5A or B and high voltage cable see Sec 5 6A or B are good and there is no spark at the tip of the electrode replace the electrode 5 12 CLIMATE CONTROL HEATER The climate control is a switch operated DC electric heater lts primary function is to warm the frame of the refrigerator during high temperature high humidity conditions This prevents the formation of condensation on the metal frame To check the switch disconnect the wires and do a continuity check In the OFF position there should be no continuity In the ON position there should be a continuity reading ersnosne SERVICE MANUAL To check the heater itself do an ohms resistance reading on the heater wire by using a properly cali brated ohm meter The proper ohms reading is 34 ohms 10 The approximate amp draw is less than 5 1 2 amp NOTE The climate control will draw DC power continu ously It should be turned off when charging source Is not available SECTION 6 LP GAS REQUIREMENTS The LP gas pressure to the refrigerator should be 11 inches water column with
8. Thermistor Adjuster RM7030 Prod No 921890401 4RM7732 10 NE e oo 10 A la a PPP E e o A 11 OO AOM O ade Cable aci oe crisis 11 Sy TOO roto 12 ao SIDE TK NG Oar Gl Baka aan a aaa KADA KA BAANG E KAKANGE AAK BAIK ARA KAKA 12 39 LOWS CiCUIL Board sa atan aaa ga AA a a AGA A a pa KA NON ina 15 FO DO A o E A Ga Ka a NAN BE AA eh Kg Ki Ka 17 Dek b o iii akan a o oO 18 dla Alimat Control Saler osado 18 SECTION 6 LP GAS LP Gas Requests stand 18 SECTION 7 LP GAS COMPONENTS Fall Manuales SO Valve adorada 19 Fa sanega gena e OO O MG AT a ar gan aa Ba aaa 20 Fa T OU TG e o o TEN EE TAA AT 20 FA BINS maa gan ni ana Baga a BG DATAR EAA BAEN BABADAN DANA Bag BANA BEN BRANA EA 21 Fea TA aS reacia 21 A0 PVE oO RMZOS0 OMIY saa saa a aaa o D A aa a aa KG A KAN 21 DOME TICL RM7030 RM7732 DIAGNOSTIC SERVICE MANUAL Refrigerators CONTENTS sae SECTION 8 WIRING A SiR NN Teatre adorado 21 Se MS WII O td aid dis 21 SECTION 9 OTHER A e OE 25 Ou VENAL an 25 r do PCOS espa aa aaa Ja NG EA E NGA Kab ga E E aaa ba kain 25 El IE WOOF POSIT Napa 27 9 5 Ambient Temperature occcccccoccnconocconcnnonannanccnonconannenanronnnns 27 9 0 KONG UAC tad 27 NY TODA IO ADO morro GR GA AKE ne ne KE Na ee a GS 27 a TANG da o AAA e aaa ak a a ag a a bes tongs E ES En bea aan 27 9 9 Interior Liner Seal to Frame ccccccceceeeeeeeeeeeseeeeeeeeeeareanas 28 SECTION 10 ICE MAKER ICS Maker OperatiON monsters ocn 29 SECTION 11 ICE MAKER CO
9. activated First check that voltage in excess of 10 5 volts is between the yellow terminal on the 6 pin connector positive lead from meter to the ground strip negative L lead from meter If less than 10 5 volts correct wiring and or power 6 Pi in source problem Next check for the pulse voltage from the igniter at the orange terminal on the 6 pin connector negative O lead from meter and the ground strip positive lead from meter If there is no signal voltage check the igniter See Sec 5 5A and the orange wire and connections If signal voltage is present next check rersnosne SERVICE MANUAL for voltage on the solenoid wires at the ORANGE circuit board Positive lead from meter to the gray wire and negative lead from the meter to the black wire If voltage is 9 5 volts or more the circuit board is good Do not replace If no voltage is present replace the circuit board 6 Pin D DC VOLTS TO UPPER CIRCUIT BOARD THESE PROCEDURES MUST BE FOLLOWED IN SEQUENCE AND AT THE PROPER TERMINALS OR DAMAGE TO THE BOARD WILL RESULT This check is to determine if the lower circuit board is providing BLUE voltage to the upper circuit board Measure between the brown terminal on the 10 pin connector positive lead from meter to the blue terminal on the pin connector negative L lead from meter A voltage reading indi cates the circuit board is good If no voltage is present replace the circuit b
10. and motor are now energized The ejector blades begin to turn 32 DIAGNOSTIC SERVICE MANUAL 115 VOLTS 60 CYCLE THERMOSTAT MOLD HEATER SHUT OFF SWITCH After a few degrees of motor rotation the timing cam switches the holding switch to its normally open position this assures completion of the cycle The mold heater remains energized through the thermostat circuit During the first half of the cycle the shut off arm is raised and lowered by the timing cam and operates the shut off switch 115 VOLTS 60 CYCLE THERMOSTAT MOLD HEATER SHUT OFF SWITCH When the ejector blades reach the ice in the mold the motor will stall It will remain in this position until the ice has thawed loose During this time the mold heater remains energized DIAGNOSTIC SERVICE MANUAL 115 VOLTS 60 CYCLE MOLD HEATER Near the completion of the first revolution the timing cam closes the water valve switch However since the thermostat is still closed the mold heater circuit is energized Current will not pass through the water valve solenoid and its switch Electrical current follows the path of least resistance 115 VOLTS 60 CYCLE SHUT oFF swiTcH THERMOSTAT MOLD HEATER WATER SOLENOID SWITCH SOLENOID At the end of the first revolution the timing cam opens the holding switch However since the thermostat is still closed a second revolution begins DOMETICL RM7030 RM7732 Refrigerators 115 VOLTS 60 CYCLE
11. formation of condensation on the frame 27 DOME TICL RM7030 RM7732 Refrigerators 9 9 INTERIOR LINER SEAL TO FRAME There is a seal that is applied to the liner in the area where the metal frame makes contact with the interior liner If this seal is incomplete cold air can migrate out to the metal frame If this happens condensation could form on the frame and could promote rapid formation of frost If you Suspect an improper seal apply a small bead of silicone all the way around the perimeter where the frame meets the interior liner Remove all screws securing the refrigerator into the cabinet and slide the refrigerator out approximately 2114 inches Clean the metal frame and foil backed insulation around the refrigerator Apply a foil backed adhesive tape to the joint between outer frame and foil backed refrigerator insulation Refer to illustration top of page 22 28 _ ersnosne SERVICE MANUAL Make sure the refrigerator is dry and that the surface temperatures are above 50LIF Use aclear silicon caulking compound and seal the seam between the refrigerator s plastic liner and the metal frame Apply the silicon in a continuous bead around both the refrigerator freezer and food compartments NOTE TO FORM A PROPER SEAL IT IS IMPOR TANT NOT TO LEAVE ANY GAPS CAULK SEAM BETWEEN PLASTIC LINER AND METAL FRAME Refrigerator shown with doors removed Section 10 Icemaker Operation co
12. fuse failure and correct before replacing fuse 6 PIN 7 PIN CONNECTOR 10 PIN CONNECTOR CONNECTOR 5 8 UPPER CIRCUIT BOARD RM7030 Product No 921890201 921890301 A ON OFF SWITCH NOTE The following checks should be made on the upper circuit board and harness assembly BEFORE replacing the upper circuit board or wiring harness The checks are to be done with the wiring harness REMOVED from the lower circuit board ORANGE NELLOW With the switch in the ON position CONTINUITY should be indicated be tween the orange terminal to the yellow terminal on the 10 pin connector 12 _ erenosne SERVICE MANUAL CONTINUITY should be indicated between the brown terminal to the red terminal on the 10 pin connector l l YELLOW NO continuity should be indicated between GREEN the yellow terminal to the green terminal l NNNMNNN on the 10 pin connector NO continuity should be indicated BLUE RED between the red terminal on the 10 pin connector to the blue terminal on the 7 pin connector 7 Pin 10 Pin With the switch in the OFF position CONTINUITY should be indicated between the yellow terminal to the green terminal on the 10 pin connector CONTINUITY should be indicated between the red terminal on the 10 pin connector to the blue terminal on the 7 pin connector 7 Pin 10 Pin ORANGE NO continuity should be indicated NELOW between the orange terminal to the yellow ter
13. half of all BT U s of the RV turned on With all other appliances off the pressure to the refrigerator should not exceed 12 inches water column To check the gas pressure when the refrigera tor is operating there is a pressure test port on the solenoid TEST PORT RM7030 Product No 921890401 and RM7732 SOLENOID VALVE TEST PORT DIAGNOSTIC SERVICE MANUAL DOMETIC RM7030 RM7732 Refrigerators SECTION 7 LP GAS COMPONENTS 7 1 MANUAL GAS Shutoff VALVE The manual gas shutoff valve is where the incoming LP gas supply is attached To check the shutoff valve remove and inspect for any obstructions The valve must be turned to ON before any gas operation can occur RM7030 Product No 921890201 amp 921890301 MANUAL GAS Shutoff VALVE RM7030 Product No 921890401 and RM7732 Manual Gas Terminal Block Shutoff Valve Flexible Cord 19 DOME TICL RM7030 RM7732 Refrigerators 7 2 ORIFICE The orifice is a small brass fitting that has a ruby membrane that Is laserbeam drilled and is mounted on the gas line just prior to the burner The orifice is cleaned by using an alcohol based solvent and allowing to air dry AAWARNING NEVER USE A DRILL BIT OR JET TIP CLEANER TO CLEAN ANY ORIFICE AS THESE DEVICES WILL DAMAGE THE FACTORY MACHINED PART AND CREATE A POTENTIALLY DANGEROUS CONDI TION If there is lack of cooling on gas operation verify the orifice is the proper size 73 7 3 TH
14. mode indicator lamp A will illuminate indicating AC operation If 120 volts AC is not available the GAS mode indicator lamp C will illuminate and the control system will automatically switch to GAS operation If the CHECK indicator lamp D illuminates and the GAS mode indicator lamp C is OFF the controls have failed to ignite the burner in the GAS mode GAS operation may be reset by pressing the main power ON OFF button 1 to the OFF then ON position See GAS MODE Press the TEMPERATURE SELECTOR button 3 until the lamp at the desired position is illuminated DOME TICL RM7030 RM7732 Refrigerators GAS MODE Move the AUTO mode selector button 2 to the UP position The GAS mode indicator lamp C will illumi nate After 45 seconds the burner should be ignited and operating normally On the Initial refrigerator start up it may take longer than 45 seconds to allow air to be purged from the gas line If the gas does not ignite within 45 seconds the CHECK indicator lamp D will illuminate and the GAS mode indicator lamp C will go off To reset when the CHECK indicator lamp D is illuminated press main power ON OFF button 1 to the OFF then ON position NOTE DO NOT continue to reset GAS operation if the CHECK indicator lamp continues to be illumi nated after several tries Press the TEMPERATURE SELECTOR button 3 until the lamp E at the desired position is illuminated THERMOSTAT The thermostat on the r
15. resistance between the brown terminal on the 7 pin connector positive lead from meter to the brown terminal on 7 Pin the 10 pin connector negative O lead from meter The proper resistance is approximately 26 000 ohms NOTE If the check on the AES function lamp is not correct verify the wire harness has continuity If wire harness is good replace the upper circuit board GAS FUNCTION SWITCH NOTE The following checks should be made on the upper circuit board and harness assemblyBEFORE replacing the upper circuit board or wiring harness The checks are to be done with the wiring harness REMOVED from the lower circuit board and the ON OFF switch turned to ON DOME TICL RM7030 RM7732 Refrigerators With the gas function switch BLUE VIOLET manually depressed CONTI NUITY should be indicated between the violet terminal on the 10 pin connector to the blue terminal on the pin connector With the gas function switch NOT de 7 PIN 10 PIN pressed A reading wouldNOT be indicated NOTE If the check on gas function switch is not correct verify the wire harness has continuity If wire harness is good replace the upper circuit board GAS FUNCTION LAMP NOTE The following checks should be made on the upper circuit board and harness assemblyBEFORE replacing the upper circuit board or wiring harness These checks are to be done with the wiring harness REMOVED from the lower circuit board andthe ONJO
16. the control system is being tested When position 1 is illuminated the control is in an Idle position with all output loads off To activate the first load simply push the Temperature Selector Switch All of the checks listed below are done on the lower circuit board The manual test Sequence Is as follows Position 1 Idle Position all loads off Position 2 Activate AC Heater Check for AC volts at terminals J7 and J8 Position 3 Activate Gas Solenoid Check for DC volts at Gas Solenoid white wire and yellow wire Position 4 Idle position All loads OFF Position 5 Activate spark ignition system Check for DC volts to terminal of igniter and ground If you experience a problem on any of the above checks verify the fuses on the lower circuit board are good If all checks prove to be good and the refrigera tor does not operate on electric mode replace the lower circuit board It has been damaged by AC volts in excess of 180 volts 5 9 LOWER CIRCUIT BOARD RM7030 Product No 921890201 amp 921890301 The circuit board controls all modes of operation A DC VOLTS THESE PROCEDURES MUST BE FOLLOWED IN SEQUENCE AND AT THE PROPER TERMINALS OR DAMAGE TO THE BOARD WILL RESULT Before any checks are to be done be HOW GREEN sure proper DC volts are to the board 1 Measure volts between yellow terminal on the 6 pin connector positive lead from meter to green terminal on 6 pin connector neg
17. then back ON This will reset the AES controls and turn off the flame failure indicator H The system will start another cycle for gas Ignition If the refrigerator has not been used for a long time or the LP tanks have just been refilled air may be trapped in the supply lines To purge the air from the lines may require resetting turning OFF and ON the On Off switch C three or four times If repeated attempts fail to start the LP gas operation check to make sure that the LP gas supply tanks are not empty and all manual Shutoff valves in the lines are open NOTE If you are in the AES mode when the flame failure light H comes on the mode indicator lamp A green light will go out If 120 volt AC power becomes available during this period the mode indication lamp will come on showing that the refrigerator is operating on another energy source The red lamp H will remain on until the AES system is reset with an OFF ON operation of the main switch C If you have selected the LP gas only mode control button B the 120 volt function has been locked out If the burner fails to light the green lamp over button B will go out and the red lamp H will glow indicating flame failure Even if 120 volts is available the refrigerator cannot switch to electric operation and all cooling will stop This fact must be considered when selecting gas only operation 120 VOLTS AC OPERATION Since 120 volt AC is usually the most econ
18. 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 appli ance and ignite from the burner flame CAUSING A FIRE OR AN EXPLOSION FOR YOUR SAFETY it is recommended that all LP gas appliances which are vented to the outside should be shut off when refueling The AES system is designed to turn off the LP flame during refueling stops by the use of the delay cycle explained previously However you must remember that the delay cycle will be activated only if the refrigerator is properly connected to the vehicle engine electrical circuit If the refrigerator is not connected to the engine by the ignition lock wiring the refrigerator must be shut off during refueling To do this turn the main system switch C to OFF Only after the vehicle has been moved away from the refueling area should the main system switch C be turned back ON DOME TICL RM7030 RM7732 Refrigerators FLAME FAILURE DURING LP GAS OPERATION If the LP gas flame fails during the burner cycle the high voltage spark will continue arcing for up to three minutes At the end of three minutes the gas control will stop the flow of LP gas to the burner the sparking will stop and the red indicator lamp H will light up LP gas operation will not be possible as long as this indicator is ON To restart LP gas operation turn the main system switch C to OFF for five seconds and
19. 4 PA DOMETICO RM7030 RM7732 ca ss DIAGNostic SERVICE MANUAL Refrigerators Foreword This service manual is the result of the dedication of The Dometic Corporation and its engineers in giving service people the necessary instruction for making accurate analyses of certain conditions Provided is a diagnostic chart leading a qualified mechanic into the service manual pages to locate and solve symptoms which may occur Dometic has continued its commitment in providing service people with this the most up to date information about servicing Dometic RV accessories form No 3 106938 008 2 96 Replaces OS1 684 DIAGNOSTIC SERVICE MANUAL DOMETICL RM7030 RM7732 Refrigerators RM7030 RM7732 DIAGNOSTIC FLOW CHART sseccesseeeeees 1 SECTION 1 OPERATION 1 1 RM7030 Prod 921890201 amp 921890301 Refrigerator Operation cococcocccnononconancononconanconanannonnnnonanconnns 5 1 2 RM7030 Prod 921890401 Refrigerator Operation 6 ay 1 3 RM7732 Refrigerator Operation cccccccceceeeeeeeeeeeeeeeeeeeeeenees 7 SECTION 2 AC VOLTAGE AC Voltage Requirements coi 9 SECTION 3 AC COMPONENTS Mound cIm E een EEEE E r ag a E EEEE EAE EE 9 SECTION 4 DC VOLTAGE DC Voltage Requirements ccccececeeceeeeeeeeeeeaeeatseesesaeaneaeeas 9 SECTION 5 DC COMPONENTS 5 1 Thermostat RM7030 Prod No 921890201 amp 921890301 9 5 2 Thermistor RM7030 Prod No 921890401 RM7732 10 5 3
20. 921890401 amp RM7732 For the refrigerator to operate on any mode DC voltage must be supplied to the terminals at the rear of the refrigerator The operational range of the unit is a minimum of 9 6V DC to amaximum of 22V DC The unit will automatically shut down until voltage has decreased to 18V DC The refrigerator requires at least 9 6V DC for proper opera tion however the panel lights will continue to illuminate until voltage has dropped to 4V DC or below Connecting the refrigerator to an unregulated converter can result in improper operation of the refrigerator Do not use the body or chassis of the RV as a Substitute for either of the two conductors Proper polarity is crucial for refrigerator operation Check for proper DC voltage at the positive and negative terminals at the back of the unit If the voltage is outside the operational range correct the power supply problem SECTION 5 DC COMPONENTS 5 1 THERMOSTAT RM7030 Product No 921890201 921890301 The thermostat operates on DC volts and regulates the inside refrigerator temperature on all modes by making and breaking the circuit to the printed circuit board The internal mechanism breaks contact continuity when adequate cabinet temperature has been reached Check the thermostat for continuity This check should be made at room temperature with the thermostat turned all the way to MAX Another check would be to use a jumper wire with insulated clips and bypa
21. ERMOCOUPLE A RM7030 Product No 921890201 amp 921890301 The thermocouple is a component extending above the burner assembly so the tip is in the path of the flame It will produce 14 to 30 millivolts DC in normal operation To check the thermocouple use a known good safety ersnosne SERVICE MANUAL valve and attach to the thermocouple Next supply flame to tip of the thermocouple for a few moments while depressing the safety valve Remove the flame and release the safety valve The valve should hold for at least 30 seconds If it does not hold the safety valve open for 30 seconds replace the thermocouple If it does hold for 30 seconds or more the thermocouple is good U do not replace it NOTE Be sure the tip on the thermocouple is clean B RM7030 Product No 921890401 RM7732 The thermocouple is a component extending above the burner assembly so the tip is in the path of the flame During normal gas operation the thermocouple should produce 25 to 35 millivolts when connected to the lower circuit board Any reading below 18 millivolts could cause erratic gas operation NOTE A reading of 18 or less could be caused by low gas pressure or improper thermocouple location RM7030 Product No 921890201 amp 921890301 THERMOCOUPLE ELECTRODE BURNER TUBE PRESSURE TEST PORT RM7030 Product No 921890401 and RM7732 MANUAL SHUTOFF VALVE Shown in open position Use a quarter dollar or slotted screwdr
22. FF BROWN WHITE switch turned to ON Measure resistance between the brown terminal on the 10 pin connector negative L lead from meter to the white terminal on the 10 pin connector positive lead from meter The proper 10 PIN ohms resistance is approxi mately 26 000 ohms NOTE If the check on gas function lamp is not correct verify the wire harness has continuity If wire harness is good replace the upper circuit board AC MODE LAMP AND SWITCH NOTE The following checks should be made on the upper circuit board and harness assemblyBEFORE replacing the upper circuit board or wiring harness These checks are to be done with the wiring harness REMOVED from the lower circuit board and the ON OFF switch turned to ON With the mode switch manually depressed Resistance should be indicated between the brown terminal on the 10 pin connector negative U lead from meter to the red terminal on the 7 RED pin connector posi tive lead from meter The proper resistance is approxi mately 26 000 ohms 7 PIN 13 DOME TICL RM7030 RM7732 Refrigerators With the mode switch NOT depressed A reading wouldNOT be indicated NOTE If the check on AC mode lamp and switch is not correct verify the wire harness has continuity If wire harness is good replace the upper circuit board G DELAY MODE LAMP AND SWITCH NOTE The following checks should be made on the upper circuit board and harne
23. MPONENTS 11 1 MOLD HEATER The mold heater uses 165 watts to thaw the ice free from the mold It is wired in series with the thermostat which also acts as a safety device With power to the appli ance off check for resistance be tween the two leads to the heater element You should obtain a reading of approximately 80 ohms If the heater is found to be defective the manufacturer recommends replacement of the entire ice making unit for proper operation MOLD HEATER Staked in Place 11 2 ICE EJECTOR The ice ejector blades sweep the ice from the mold cavities during the ejection cycle The drive end of the ejector is D shaped for positive coupling The bearings at both ends are lubricated with silicone grease If the ejector blades are frozen Into the ice defrost the ice maker and manually cycle the ice making unit making sure the ejector stops at the right location D SHAPED DRIVE END 11 3 MOLD THERMOSTAT This is asingle pole single throw bimetal switch It starts an ejection cycle by closing at 18LIF 11511 The reset temperature is 50LIJF 1150 The thermostat is in series with the mold heater and acts as a safety against overheating in case of a mechanical failure If the thermostat is defective replace it 29 DOME TICL RM7030 RM7732 Refrigerators 11 4 SHUTOFF ARM The shutoff arm is cam driven It operates a switch to control the quantity of ice produced During the ejection c
24. MPONENTS TT Mold He dtOr cis e o E na aa aa 29 VS NCCT PP e E E 29 Tko Mold TNermMoOSta Essisrinzamensa atera 29 RS Be UW Aa E Na Aa TA NR KN Na SANG WK Na Nn 30 o WICKES WIC NES saraga aaa en Ba BA E an nada an D Gg a ANAA E KAN KA Dan aa KR Na NK 30 LO oo aries ja anis Baka Basah Da aa NOK BE Kaka APE Na a KG NK BAE BN SEA kade ani 30 Vad WENG Ya VE aaa Dang aj aa a napa nani aa anaa a ia aga aaa ai aaa aaa ara Sanak mai Baga 30 11 9 ICS Maker ASSEMIDIN saga panata tee 31 SECTION 12 ICE MAKER U OTHER al Wier FAU mE arco ad 34 tas WWA ed 35 V2 WAS daa 35 DIAGNOSTIC SERVICE MANUAL DOMETIC RM7030 RM7732 Refrigerators This program will address the most common system problems associated with the Dometic RM7030 RM7732 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 symptoms RM7030 REFRIGERATOR SECTION Product No 921890201 amp 921890301 SYMPTOM CAUSE REFER TO STEP REFRIGERATOR SECTION 1 No operation LI no panel lights Operation 1 1 A DC Volts 4 A Fuse 5 7 A Wiring 8 1 8 2 Upper Circuit Board 5 8 A Lower Circuit Board 5 9 A D 2 NooperationLlhas panel lights Operation 1 1 A Thermostat 5 1 Upper Circuit Board 5 8 A Solenoid 5 4 A Wiring 8 2 Lower Circuit Board 5 9 B C D 3 Operating OK Uno panel lights DC Volts 4 A Wiring 8 2 Upper Circuit Board 5 8 B through Lower Circuit Board 5 9 D 4 NoAC operation
25. OM CAUSE REFER TO STEP 26 Interior light on when door is closed Wiring Door Switch Door Position 27 Rapid formation of frost Food Storage Interior Liner to Frame High Humidity AirLeaks 28 Water on frame Interior Liner to Frame High Humidity Air leaks Climate Control Heater ICE MAKER SECTION 29 Ice Maker fails to start Operation Arm in UP Position AC Voltage Water Valve Ice Maker Cycle SEE BEBE CEBE EEE N BFE GEIS GS ES ES BEEE El EE El 30 Ice Maker won t make ice Blades frozen in ice AC Voltage Water Valve Ice Maker Cycle 31 Keeps making ice and won t shut off Shutoff Arm 32 Not making enough ice Operation Mold Thermostat Cube Size Ice Maker Cycle 33 Too much water is coming out Water Fill Adjustment Water Valve 34 Ejector blade frozen into ice cubes Water Fill Adjustment Water Valve 35 Unitis hooked up U no water comes in Water Supply Water Valve 36 Ice maker is running but won t make cubes Water Supply Shutoff Arm Mold thermostat Hold Switch 37 Ice maker will not eject ice Ice Ejector Mold Heater Timing Motor roncnosne SERVICE MANUAL SECTION 1 1 1 OPERATION RM7030 Product No 921890201 amp 921890301 lol gt OU O 5 of O Q oB 1J oG IM O le On IM O e OF AES FULLY AUTOMATIC MODE Turn switch C to the ON position The bulb above pus
26. again the control will switch back to AC regardless of the status of GAS operation GAS MODE 1 Move the AES mode selector button 2 to the UP position The GAS mode indicator lamp C will illuminate After 45 seconds the burner should be ignited and operating normally 2 On the initial refrigerator start up it may take longer than 45 seconds to allow air to be purged from the gas line If the gas does not ignite within 45 seconds the CHECK indicator lamp D will illuminate and the GAS mode indicator lamp C will go off To reset when the CHECK indicator lamp D is illuminated press the main power ON OFF button 1 to the OFF then ON position If the control is switched to AC operation while the CHECK indicator lamp is on it will function properly but the CHECK indicator lamp will not go off until the main power ON OFF button is pressed to the OFF then ON position NOTE Do not continue to reset GAS operation if the CHECK indicator lamp continues to be illumi nated after several tries If repeated attempts fail to Start the LP gas operation check to make sure that the LP gas supply tanks are not empty and all manual shutoff valves in the lines are open 3 Press the TEMPERATURE SELECTOR button 3 until the lamp at the desired position is illuminated THERMOSTAT The thermostat on the refrigerator controls both the gas and electric operation thereby eliminating the necessity of resetting each time a different energy sour
27. ative L lead from meter Voltage should be the same as 6 PIN at the positive and negative U terminal block If not check the fuse and wiring 19 DOME TICL RM7030 RM7732 Refrigerators B AC OPERATION THESE PROCEDURES MUST BE FOLLOWED IN SEQUENCE AND AT THE PROPER TERMINALS OR DAMAGE TO THE BOARD WILL RESULT For AC heating element operation check that voltage is present between the large black and large white wire at the circuit board If voltage is below 100 volts the circuit board will select another mode If voltage is above 100 volts check that AC volts are present at the heating element connection If no voltage is present change the circuit board NOTE Before installing a new circuit board correct the cause of the failure most likely it is the heating ele ments or wiring If voltage is present DO NOT CHANGE THE CIRCUIT BOARD Check the following components heating elements upper circuit board thermostat and wiring C GAS OPERATION THESE PROCEDURES MUST BE FOLLOWED IN SEQUENCE AND AT THE PROPER TERMINALS OR DAMAGE TO THE BOARD WILL RESULT Before you check the circuit board for gas operation verify these components are good Igniter Sec 5 5A High Voltage Cable Sec 5 6A Electrode Sec 5 11 Solenoid Sec 5 4A Upper Circuit Board Sec 5 8A to 5 81 Thermostat Sec 5 1 Also be sure NO voltage Is present at the IGN lock terminal and delay mode is not dias dd
28. boards PAL is available from your Dometic parts distributor This control system has an integral Diagnostic Test sequence Access to the diagnostic sequence unit is by means of the ON OFF Power Switch and the Temperature Selector Switch With the Power Switch in the OFF position hold the Temperature selector Switch in the DOWN position While keeping the Temperature Selector Switch in the DOWN position move the main power ON OFF Switch to the ON DOWN position Hold the Temperature Selector Switch DOWN for three 3 seconds The control will indicate that the diag nostics have been entered by illuminating each of the Mode Indicator Lamps and the Temperature Indicator Lamps one at a time in sequence Each lamp is illuminated twice The Check Lamp will then flash ON and OFF and 1 position Tempera ture Indicator will remain illuminated The test sequence can be operated automatically or manually For AUTO step sequence press the AUTO GAS Mode Selector Switch to the DOWN position The AUTO Mode Indicator will illuminate lf each lamp illuminates during the check the display circuit board is good In automatic test mode each load is activated for approximately four 4 seconds then released The control system will automatically exit the diagnostic sequence In approximately four 4 minutes or when power is turned OFF DOMETICL RM7030 RM7732 Refrigerators The Temperature Indicator Lamps are used to indicate which part of
29. ce Is employed After the initial start up the thermostat should be moved from COLDEST to the desired temperature setting usually about mid setting STANDBY MODE OF OPERATION This control system contains a feature where it will continue to operate the cooling system in the event of a failure of a major operating component Two different modes of operation can occur in this category DOMETICL RM7030 RM7732 Refrigerators If for some reason the display module becomes non functional the control system will revert to fully auto matic operation D selecting the best energy source available with AC and GAS priority The temperature of the refrigerator will be maintained at the MID position within normal temperature tolerances The power module will continually attempt to reestablish operation of the display module The second standby mode of operation will execute when a failure of the temperature sensing device or associated electronic circuitry occurs If this should occur the control system will operate on the energy source selected via the control panel The cooling unit will run continuously on the selected energy source The refrigerator will continue to operate in this mode indefi nitely or until a new sensor is installed and the system is reset 1 3 RM7732 REFRIGERATOR OPERATION 2 WAY DISPLAY PANEL AUTO MODE Press the AUTO mode selector button 2 to the DOWN position If 120 volts AC is available the AC
30. ck for DC voltage between J4 and J10 terminals on the lower circuit board If fuse is good and there is battery voltage at J4 remove and replace lower circuit board Next check for DC voltage at the upper circuit board between terminal 4 orange or white wire and terminal 3 black wire which is negative U DC If no voltage and your previous check proved voltage at the lower circuit board between these wires replace the cable assembly If DC volts are present proceed to the next check UPPER CIRCUIT BOARD ORANGE OR WHITE 4 BROWN 2 BLACK 1 60000 a o O roncnosne SERVICE MANUAL With main ON OFF switch on display panel in ON position Check for DC volts between terminal 3 red wire LJ negative and terminal 5 green wire and terminal 1 black wire If there is no voltage the ON OFF switch on upper circuit board is defective Replace the upper circuit board If voltage is present the ON OFF switch is good Next do the same voltage test at the lower circuit board Negative D plug 1 terminal 5 red wire to plug 1 terminal 1 green wire and plug 1 terminal 3 black wire If there is no voltage and you had voltage on previous test the cable assembly is defective and you must replace it If voltage is present the ON OFF switch on the upper circuit board and cable assembly is good DIAGNOSTIC MODE NOTE The PAL tester will allow for proper testing of the integrity of the upper and lower circuit
31. e bin is full as shown here additional cycles will not start until sufficient ice is used to lower the shut off arm thus operating its switch 34 erenosne SERVICE MANUAL SECTION 12 ICE MAKER LI OTHER 12 1 WATER FILL ADJUSTMENT The correct water level in the mold is important for the proper production of ice The size of the ice cubes depends on the amount of water which enters the mold The cubes should be approximately 1 2 wide 3 4 high and 2 1 2 long If the water overflows in the mold first check to see if the ice maker unit is level in the appliance Next ensure that the appliance Is installed level in the RV If there is still water overflow adjustment of the water fill screw Is necessary Locate the screw on the ice maker assembly Turn the screw as necessary toward the or LI side One full turn of the screw will make an 18cc change in the amount of water DO NOT turn the screw more than one full turn at a time If the water level is too high it can also cause the ejector blades to become frozen in the ice Follow the procedures above to correct the problem WATER FILL ADJUSTING SCREW 1 FULL TURN 18 cc s CHANGE DIAGNOSTIC SERVICE MANUAL DOMETIC RM7030 RM7732 Refrigerators 12 2 WIRING Refer to the wiring diagram supplied with the unit you are working on and make sure all wiring connections are correct and tight WARNING THIS IS AN ENERGIZED CIRCUIT ELECTRICAL SHOCK CAN OCCUR BEFORE
32. e refrigerator 0 CLEARANCE FROM SIDE OF CABINET CLEARANCE FROM COMBUSTIBLE MATERIALS PATH OF AIR FLOW The refrigerator extracts heat from the Interior of the refrigerator cabinet and dissipates the heat out through the vent system In a proper installation there should be DOMETICL RM7030 RM7732 Refrigerators as little open space as possible surrounding the sides and top of the refrigerator to achieve proper air flow All potential dead air pockets should be blocked or baffled to ensure that heat won t be trapped in these spaces and reduce efficiency NOTE Refrigerators should be installed in accordance with appropriate installation instructions received with the refrigerator 93 AIR LEAKS Check the gasket on the doors to be sure of a positive air seal A simple method to check gaskets is to close the door on a dollar bill then pull the dollar bill out If no resistance is felt the gasket is not sealing properly This should be done on all four sides of the door If a gasket is not sealing properly first warm the gasket material with a hair drier DO NOT OVERHEAT AS YOU CAN MELT THE MATERIAL Then close the door and the magnetic strip should pull the gasket to the metal frame Leave door closed until the material has cooled Then recheck for a positive seal If a positive seal cannot be achieved replace the gasket Also check that the cooling unit is installed properly The cooling unit s foam block the po
33. efrigerator controls both the gas and electric operation thereby eliminating the necessity of resetting each time a different energy source Is employed After the initial start up the thermostat should be moved from COLDEST to the desired temperature setting Is usually about mid setting TO SHUT OFF THE REFRIGERATOR The refrigerator may be shut off while in any mode of operation by pressing the main power ON OFF button 1 to the UP OFF position This shuts off all DC power to the refrigerator including the interior light DESCRIPTION OF OPERATING MODES AUTO MODE When operating in the AUTO mode the AUTO mode indicator lamp B will illuminate The control system will automatically select between AC and GAS operation with AC having priority over GAS Either the AC indica tor lamp A or the GAS indicator lamp C will illuminate depending on the energy source selected by the control system If the control system Is operating with AC energy and it then becomes unavailable the system will automatically switch to GAS As soon as AC becomes available again the control will switch back to AC regardless of the status of GAS operation ersnosne SERVICE MANUAL GAS MODE When operating in the GAS mode the AUTO mode indicator lamp B will be off and the GAS mode indica tor lamp C will be illuminated This mode provides LP gas operation only The control system will activate the ignition system and will attempt to light t
34. eration DC volts are sent to the solenoid coil which opens the internal valve Check the solenoid coil with a properly calibrated ohm meter Remove the connector from the solenoid and measure the resistance across the terminals The proper reading would be 49 ohms with a tolerance range of ten percent roncnosne SERVICE MANUAL Next hook up a manometer at the test port Then check for DC volts at gas valve terminals while the unit is in trial for ignition If DC volts are present and pressure is low replace the valve If DC volts are not present at the valve while unit is in trial for ignition verify that the wires at Plug 3 Terminal 1 and 2 on lower circuit board have DC volts 9 or more If the valve chatters check for low input voltage to the valve below 9V DC 5 5 IGNITER A RM7030 Product No 921890201 amp 921890301 The igniter is an electronic device that produces high voltage to create a Spark at the burner only on gas mode It also produces an increased DC voltage at the L terminal which is a signal to the circuit board that a spark has been produced First verify proper voltage at the positive and ground D terminals The reading should be within one volt of incoming voltage at the main terminal block A voltage drop of more than one volt would indicate a loose connection see Sec 8 2 or a circuit board problem see Sec 5 9A to 5 9D Next disconnectDC power at refrigerator terminal bloc
35. erators LP GAS ONLY OPERATION Turn switch C to the ON position and press push button B The green indicator lamp over push button B will come on and the refrigerator will operate only on LP gas even if 120 volts are available When the vehicle engine is turned OFF the AES system initiates a 25 minute delay preventing the refrigerator from operating on LP gas LP GAS DELAY MODE When the vehicle engine Is turned off the AES system initiates a delay cycle which prevents the refrigerator from operating on LP gas for 25 minutes The purpose of the delay is to avoid having a gas flame burning dur ing a refueling stop at a gas station See WARNING If the vehicle engine is restarted during this delay pe riod the LP gas operation will not start until the delay period is over This means each time the vehicle engine is stopped the complete 25 minute delay cycle will take place If 120 volt AC becomes available during this de lay cycle the AES system will start operation in the 120 volt AC mode immediately unless the push button B LP gas only has been pressed If the RV is stopped somewhere other than a gas sta tion you may wish to cancel the delay cycle To do this turn the main system switch to OFF for several sec onds then turn the main system switch back to ON and the system will immediately start operation in the LP gas mode IA NTE Most LP gas appliances used in recreational ve hicles are vented
36. f the refrigerator will be maintained at the MID position within normal temperature tolerances The power module will continually attempt toreestablish operation of the display module The second standby mode of operation will execute when a failure of the temperature sensing device or associated electronic circuitry occurs If this should occur the control system will operate on the energy source selected via the control panel The cooling unit will run continuously on the selected energy source The refrigerator will continue to operate in this mode indefi nitely or until a new sensor is installed and the system is reset rorcnosne SERVICE MANUAL SECTION 2 AC VOLTAGE REQUIREMENTS The refrigerator is a 120 volt AC 60 Hz appliance The proper operating range is 100 to 132 volts Check the AC volts at the receptacle where the refrigerator is attached If voltage is outside of the proper operating range correct the power source problem On RM7030 Product No 921890401 and RM7732 if voltage drops below 100 volts cooling efficiency will decrease with voltage decrease The refrigerator will not switch to another mode of operation until all AC power Is lost SECTION 3 AC COMPONENTS HEATING ELEMENT The heating element is designed to deliver a predeter mined amount of heat to the cooling unit To check a heating element remove the heater leads from the printed circuit board and measure for proper resistance across the t
37. g the recreational vehicle as well as the temperature of air at the back of the refrigerator As the ambient temperature increases the air temperature in the area of the cooling unit increases The RM7030 and RM7732 will maintain approximately 43 degrees food storage temperature at 110 degree ambient temperature As the ambient temperature increases itis possible for the interior temperature of the refrigerator to increase This means proper installation ventilation and leveling are important for proper operating temperature of the refrigerator 9 6 COOLING UNIT The cooling unit is a self contained hermetically sealed set of coils where the refrigeration process takes place The chemicals involved in the cooling process include hydrogen ammonia water and arust inhibiting agent There are no repairs recommended on the cooling unit If itis defective replace with a new cooling unit To check the cooling unit first verify the AC heating elements are good see Sec 3 Then place approxi mately one gallon of water inside the refrigerator and DOMETICL RM7030 RM7732 Refrigerators place a thermometer in one of the containers of water Next supply 115 volts directly to the AC heating ele ments and operate for at least 12 hours Then check the temperature on the thermometer It should be at 45 degrees or lower depending on test conditions see Sec 9 2 and 9 5 If so the cooling unit is good If the temperature of the water is ab
38. gnose specific problems Disconnect power to the appliance Disconnect the leads inside the ice maker unit Check each wire for The following series of electrical schematics on the continuity to make sure the wiring is good before following pages will show a typical cycle and the replacing the ice maker unit If there is no continuity on positions of various components during the cycle the any of these wires replace or repair them as necessary mold and its contents the ejector the shutoff arm and and recheck the ice maker unit to determine whether the storage bin the problem was in the wiring or the unit itself NOTE If you have difficulty in reading schematics and circuit diagrams please enroll in a basic electrical course at your local school or college SCHEMATICS CONTINUED ON PAGES 32 THROUGH 34 31 DOME TICL RM7030 RM7732 Refrigerators NOTE THE RELATIVE POSITION OF THESE COMPONENTS IN THE FOLLOWING SCHEMATICS EJECTOR MOLD AND CONTENTS STORAGE BIN NON ENERGIZED CIRCUIT ENERGIZED CIRCUIT mmu 115 VOLTS SHUT OFF switcH THERMOSTAT MOLD HEATER lt D This is a freeze cycle The mold is water filled with water The thermostat is open All components are de energized 115 VOLTS 60 CYCLE MOLD HEATER WATER SOLENOID SWITCH SOLENOID This is the start of an ejection cycle The thermostat switches to its closed position after being sufficiently cooled by the ice in the mold The moid heater
39. h button A will light up green indicating that the control system Is in the fully automatic mode In this mode 120 volts AC operation has first priority meaning the refrigerator will operate on 120 volts AC whenever it is available If 120 volts AC is not available the system will automatically switch to LP gas operation The thermostat inside the refrigerator cabinet cycles the element burner as required to maintain the desired temperature NOTE The AES controls will automatically go to the fully automatic mode each time switch C is turned ON LP GAS OPERATION When there is no electrical power available 120 volts AC or if the indicator lamp above button B is ON the AES system will switch to LP gas operation When the thermostat in the refrigerator cabinet calls for cooling the following sequence takes place A A high voltage spark is created above the burner B Power is sent to a solenoid which opens the gas control allowing LP gas to flow to the burner The spark ignites the LP gas and the small flame pro vides heat for the boiler C The electrode mounted above the burner tube monitors the flame continuously If the flame should fail for any reason the high voltage spark will start immediately and relight the flame When the thermostat reaches the desired temperature it will shut off the gas flame completely The system will remain on standby until cooling is again required DOME TICL RM7030 RM7732 Refrig
40. he burner for a period of approximately 45 seconds If unsuccessful the CHECK indicator lamp D will illuminate and the GAS mode indicator lamp C will turn off To restart GAS operation press the main power ON OFF button 1 to the OFF and then ON position The control system will attempt a new 45 second ignition sequence If the refrigerator has not been used for a long time or the LP tanks have just been refilled air may be trapped in the supply lines To purge the air from the lines may require resetting the main power ON OFF button 1 three or four times If repeated attempts fail to start the LP gas operation check to make sure that the LP gas supply tanks are not empty and all manual shutoff valves in the lines are open If the control is switched to AC or DC operation while the CHECK indicator lamp is on it will function properly but the CHECK indicator lamp will not go off until the main power ON OFF button is pressed to the OFF then ON position STANDBY MODE OF OPERATION This control system contains a feature where it will continue to operate the cooling system in the event of a failure of a major operating component Two different modes of operation can occur in this category If for some reason the display module becomes non functional the control system will revert to full automatic operation selecting the best energy source available with AC as first priority and GAS as the second priority The temperature o
41. he upper and lower circuit boards PAL is available from your Dometic parts distributor ALL TESTS ARE TO BE DONE WITH THE REFRIG ERATOR IN THE COOLING MODE Before checking the circuit board for gas operation verify that the following components are good Upper Circuit Board Thermistor and 3 Amp Fuse NOTE Each of the following tests should be done according to pin locations The wire colors may vary First check for voltage during trial for ignition approximately 45 seconds at Plug 3 Terminals 1 white wire and 2 yellow wire to the solenoid If no voltage is present change the circuit board If voltage is present check for voltage at the solenoid If voltage is not present check the wires and con nections Next check for voltage to the igniter If no voltage is present check the wires If good then change the circuit board If voltage is present this portion of the board is good NOTE When millivolts to the lower circuit board are 10173 the power to Plug 3 Terminal 4 blue wire will be shut off If flame extinguishes during the cooling mode the circuit board will not supply voltage to Plug 3 Terminal 4 blue wire again until the millivolts have decreased to 10113 This process could take up to 15 seconds or longer To check the flame sense circuit of the lower circuit board operate the refrigerator on GAS mode then measure the millivolts between J3 terminal and the other wire connection from the therm
42. iver to change position THERMOCOUPLE ELECTRODE 20 PRESSURE TEST PORT DIAGNOSTIC SERVICE MANUAL DOMETIC RM7030 RM7732 Refrigerators 74 BURNER B 12 Volt DC Connection The burner is a slotted metal tube located below the flue Connection is made to the main terminal block The tube on the cooling unit It should be level and the slots refrigerator must be connected to the battery circuit in the burner should be directly below the flue tube The with two wires of adequate capacity to avoid voltage burner should be cleaned periodically at least once a drop year To clean the burner remove from the refrigerator and check for any foreign residue that could cause a deflection of the gas flow or the flame Next soak the RM7030 Poduct No 921890201 amp 921890301 burner in an alcohol based solvent and allow to air dry C Ignition Lock Connection After cleaning reinstall in the refrigerator In order for the circuit board to perform certain functions it must receive a signal when the vehicle engine is running The signal wire 16 gauge mini mum should originate at the run terminal of the ignition switch and connect to the IGN Lock posi tion on the refrigerator terminal block The wire gauge should be a minimum of 14 gauge 7 5 FLUE BAFFLE The flue baffle is designed to concentrate the heat from the gas flame at a certain area of the flue tube It should be cleaned periodically at least once a year To clean
43. k Remove high voltage cable from igniter Recon nect DC power U the igniter should produce sparking sound If not replace the igniter With the igniter pro ducing spark connect meter leads to L and ground U terminals on the igniter with the meter set on 20 volts DC range or lower The meter should read a pulsating voltage If not replace the igniter DOME TICL RM7030 RM7732 Refrigerators NOTE If a spark is not produced within 10 seconds the gas flame warning lamp will illumi nate If spark is produced it will take 3 minutes for lamp to illuminate If all of the previous checks are correct the igniter is good LI do not replace B RM7030 Product No 921890401 and RM7732 The igniter is an electronic device that produces high voltage to create a Spark at the burner only on gas mode First verify proper voltage at the positive and ground D terminals The reading should be within one volt of incoming voltage at the main terminal block during trial for ignition If no voltage Is present see Sec 5 9E 109 74 Next disconnect DC power at refrigerator terminal block Remove high voltage cable from igniter Reconnect DC power the igniter should produce a sparking sound duringtrial for ignition If not replace the igniter 5 6 HIGH VOLTAGE CABLE A RM7030 Product No 921890201 amp 921890301 Disconnect DC power at the refrigerator terminal block Disconnect high voltage cable fro
44. m electrode Recon nect DC power If sparking starts cable is good see Sec 5 11 If no sparking disconnect DC power If sparking sound from igniter then replace high voltage cable B RM7030 Product No 921890401 and RM7732 Disconnect DC power at the refrigerator terminal block Disconnect high voltage cable from electrode Recon nect DC power If sparking startsduring trial for ignition the cable is good see Sec 5 11 If there is no sparking during trial for ignition disconnect DC power and disconnect high voltage cable at the igniter Reconnect DC power If there is a sparking sound from the igniter during trial for ignition then replace high voltage cable 11 DOME TICL RM7030 RM7732 Refrigerators 5 7 FUSES A RM7030 Product No 921890201 amp 921890301 The fuse is to protect the circuit board To check the fuse remove it from the holder and do a continuity check If no continuity replace it with a proper 3 amp time delay fuse B RM7030 Product No 921890401 and RM7732 The fuses are to protect the circuit board and the integrity of the heater circuit s against shorts The 3 amp DC fuse is designed to protect the circuit board from internal shorts The 5 amp AC fuse Is designed to protect the integrity of the AC heater circuit from shorts To check the fuses remove from the holder and do a continuity check If no continuity replace with a proper amperage fuse NOTE Determine the cause of the
45. me High Humidity Air Leaks Interior Liner to Frame High Humidity Air Leaks Climate Control Heater Operation DC Volts Fuse Wiring Upper Circuit Board Lower Circuit Board Operation DC volts Thermistor Fuses Upper Circuit Board Wiring Lower Circuit Board DOMETICL RM7030 RM7732 DIAGNOSTIC SERVICE MANUAL Refrigerators SYMPTOM REFER TO 18 NoAC operation D operates on gas Operation 1 1B or 1 2 AC Volts Fuse 5 7 Heating Element Upper Circuit Board Wiring Lower Circuit Board 19 Nogas operation Ll operates on AC Operation LP gas Manual Gas Valve Igniter High Voltage Cable Electrode Solenoid Upper Circuit Board Wiring Lower Circuit Board Insufficient cooling on all modes Ventilation Leveling Ambient Temperature Air Leaks Thermistor Cooling Unit Thermistor Adjuster Insufficient cooling on AC LI cools properly on AC Volts gas Heating Element Lower Circuit Board Insufficient cooling on gas LI cools properly on LP Gas AC Orifice Flue Baffle Flue Tube Flue Cap RM7030 Only Burner Lower Circuit Board Freezes Thermistor Thermistor Adjuster Lower Circuit board Upper Circuit Board Changes preset mode Operation DC Volts Wiring Upper Circuit Board Lower Circuit Board Check light on DC Volts Wiring LP Gas Manual Gas Valve Solenoid Orifice Burner Lower Circuit Board Thermocouple del SERS ie DOMETIC RM7030 RM7732 DIAGNOSTIC SERVICE MANUAL Refrigerators SYMPT
46. minal on the 10 pin connector NO continuity should be indicated between the BROWN brown terminal to the red terminal on the 10 pin connector ll NOTE If any of these checks on the ONLIOFF switch are not correct verify the wire harness has continuity If the wire harness is good replace the upper circuit board roncnosne SERVICE MANUAL AES FUNCTION SWITCH NOTE The following checks should be made on the upper circuit board and harness assemblyBEFORE replacing the upper circuit board or wiring harness The checks are to be done with the wiring harness REMOVED from the lower circuit board and the ON OFF switch turned to ON With the AES function switch manually depressed JAEK CONTINUITY should be indicated 7 BLUE between the blue terminal and the s black terminal on the 7 pin connector 7 Pin With the AES function switch NOT depressed NO continuity should be indicated between the blue and black terminals on the 7 pin connector NOTE If the check on AES function switch is not correct verify the wire harness has continuity If wire harness is good replace the upper circuit board AES FUNCTION LAMP NOTE The following checks should be made on the upper circuit board and harness assemblyBEFORE replacing the upper circuit board or wiring harness These checks are to be done with the wiring harness REMOVED from the lower circuit board and the ONLIOFF switch turned to ON BROWN BROWN Measure
47. ntinue to Page 29 rorcnosne SERVICE MANUAL SECTION 10 ICE MAKER OPERATION The refrigerator must be allowed to precool properly before starting the ice maker The refrigerator has to be connected to 120 volts AC before the ice maker can operate The water line manual shutoff valve must be open To start making ice move the ce level bail arm to DOWN position ICE LEVEL BAIL ARM When the ice maker thermostat senses the preset temperature for ejection of the ice cubes the fingers will start to rotate LI dumping any ice cubes and filling the mold with water When the storage container is full of ice the ice level bail arm can not return to the DOWN position This will stop further production of ice until the container is emptied and the bail arm is returned to the down position The absorption system will keep the compartment at the proper temperature for storage of ice lce making Is accelerated if the thermostat is set to the coldest position It is a good idea to do this a few hours before you anticipate a need for ice NOTE IF THE ICE MAKER WAS CLEANED AND DRAINED NO ICE CUBES WILL BE DUMPED INTO THE STORAGE CONTAINER DURING THE FIRST CYCLE The first few cycles may have small cubes due to air trapped in the water lines The first container of ice cubes should be dumped if the water system has been winterized or not used for several weeks DOME TICL RM7030 RM7732 Refrigerators SECTION 11 ICE MAKER CO
48. o allow the refrigerator to reach temperatures below the normal 4611 to 35LIF range setting 1 through 5 on upper circuit board To determine if the thermistor adjuster is operating properly do an ohms resistance check across the terminals Proper ohms reading is approximately 23 200 ohms U 10 5 4 SOLENOID VALVE A RM7030 Product No 921890201 amp 921890301 The solenoid valve assembly is a safety valve as well as a gas flow valve When the AES selects LP gas opera tion DC volts are sent to the solenoid coil which opens the internal valve Check the solenoid coil with a properly calibrated ohm meter Remove the connector from the solenoid and measure the resis tance across the upper and lower terminals The proper reading would be 20 ohms with a toler ance range of ten percent Once flame is lit the thermocouple produces the voltage to keep the valve open If for any reason the thermocouple does not provide enough current to the valve it will close stopping the flow of gas To check this portion of the solenoid valve assembly verify the thermocouple is good see Sec 7 3A the tip is clean and the receptacle in the solenoid valve assembly is clean If the thermo couple checks good then replace the solenoid valve assembly NOTE If the solenoid ohms check shows an open coil the refrigerator will not operate on any mode B RM7030 Product No 921890401 and RM7732 When the refrigerator selects LP gas op
49. oard NOTE Before changing the circuit board be sure all troubleshooting steps have been followed BROWN 7 Pin 10 Pin RM7030 Product No 921890401 amp RM7732 E DC VOLT ALL TESTS ARE TO BE DONE WITH THE REFRIGERATOR IN THE COOLING MODE Before any checks are made make sure the board is receiving proper DC volts Measure volts between terminal J4 and the ground strip Voltage should be the same as at the positive and negative on the terminal block If not check for loose connec tions F AC MODE NOTE The PAL tester will allow for proper testing of the integrity of the upper and lower circuit boards PAL Is available from your Dometic parts distributor ALL TESTS ARE TO BE DONE WITH THE REFRIG ERATOR IN THE COOLING MODE For AC heating element operation check that incoming AC voltage is present at terminals J5 and J6 on the circuit board If voltage is below 100 volts see Sec 2 DOMETICL RM7030 RM7732 Refrigerators roncnosne SERVICE MANUAL 3 AMP FUSE Check for voltage at the heating element connection terminals J7 and J8 on the circuit board If no voltage is present check the 5 amp AC and 3 amp DC fuses If fuse is defective replace the fuse If fuses are good replace the circuit board Black 3 6 Brown Open 3 n2 i Ope SE e Blue 4 DE 1 White Gren or WAitS3 m e 2 Yellow G GAS MODE NOTE The PAL tester will allow for proper testing of the integrity of t
50. ocouple The millivolt meter should read between 25 to 35 milli volts with the gas flame burning Next turn the manual shutoff valve to OFF and watch the millivolt reading as it drops Note the millivolt reading when Plug 3 terminal 4 blue wire receives power lt should be 10113 millivolts or 7 to 13 Repeat this test several times If the igniter fails to spark on any test sequence it should be replaced If the millivolt readings vary more than 1 to 2 MV from one test to the other when power Is supplied to Plug 3 terminal 4 replace the lower circuit board NOTE Verify all connections are clean and tight before replacing elther component 5 10 DOOR SWITCH The door switch is an open switch when the switch arm is depressed interior light should be off When the refrigerator door is open the switch is closed interior light should be on Check that the switch assembly is properly aligned and that it is not broken Check the switch assembly for continuity NOTE To do a continuity check first be sure all power is disconnected or OFF to the refrigerator Second remove all wires from the switch assembly then check the switch After the check be sure the switch assem bly is wired properly per the wiring diagram When the switch arm is depressed there should not be continuity When the switch arm is NOT depressed there should be continuity If any of these checks are incorrect replace the switch 17 DOME TICL RM7030
51. omical source for operation of the refrigerator the AES control system is designed to select this mode whenever it is available The only exception to this is when push button B LP gas only mode is selected The 120 volt heating elements attached to the boiler provide the heat necessary to operate the cooling system The thermo stat controls the power ON and OFF to the elements and maintains the desired temperature ersnosne SERVICE MANUAL LOW VOLTAGE MONITOR The AES system requires 12 volts DC power at all times to operate properly The DC power must be 9 5 volts DC or higher If the DC voltage drops below 9 5 volts DC the AES system will switch to an emergency cooling mode 1 The mode indicator lamp will go off green light 2 The system will revert to continuous LP gas operation with no thermostat control The refrigerator will continue to operate in the emer gency mode until the DC power supply is increased to 10 5 volts DC When 10 5 volts is reached the mode indicator light green will come back on and normal operation will resume During the low voltage condition the interior light will operate normally THERMOSTAT The refrigerator is equipped with a thermostat that can be adjusted to maintain various temperatures Turn the knob clockwise toward MAX for a lower temperature and for a warmer temperature Ll turn the knob counter clockwise toward MIN Set the thermostat approxi mately mid range and adj
52. ove 45 degrees replace the cooling unit 9 7 FOOD STORAGE Proper refrigeration requires free air circulation within the food storage compartment Restricted air circulation within the compartment will cause higher cabinet temperatures To remedy this situation simply rear range your food items It is also essential that the shelves are not covered with paper or large storage containers Always remember to allow for proper air circulation Odors or highly flavored foods should always be stored in covered dishes plastic bags or wrapped in foil or waxed paper to prevent food odors Vegetables lettuce etc should be covered to retain their crispness NEVER PUT HOT FOOD INTO THE REFRIGERATOR To reduce frost formation in and on the freezing com partment cover stored liquids and moist foods and do not leave the door open longer than necessary When the refrigerator is heavily loaded it takes longer to lower the refrigerator temperature and longer to make ice A very heavy load may also cause defrosting 9 8 HIGH HUMIDITY High humidity may cause a small amount of condensa tion to form on the frame of the refrigerator In extreme cases the condensation may actually run off the frame As the humidity is reduced the sweating will decrease High humidity can also be a factor in rapid formation of frost The RM7030 and RM7732 refrigerators have climate controls installed see Sec 5 12 Use of the climate control will reduce the
53. remove from the flue tube and check for any damage then clean thoroughly Do not use the body or chassis of the vehicle as a substitute for either of the two conductors No other The length of the flue baffle assembly flue baffle and electrical equipment or lighting should be connected wire should be 39 inches on RM7030 40 inches on to the refrigerator circuit RM7732 The flue baffle itself should measure 13 16 inch wide and 6 inches long on RM7030 and RM7732 8 2 INTERNAL WIRING The proper position of the baffle above the burner is 1 Check all wires at the connectors to be sure of a proper inch and tight connection Also verify the refrigerator is wired per the wiring diagram for the exact model you are 7 6 FLUE CAP RM7030 ONLY working on See the following typical wiring diagrams The flue cap is located at the top of the flue tube and is NOTE Improper wiring at the lower circuit board could attached with a screw lt must be properly attached or cause erratic operation and lower circuit board failure flame outage could occur 7 7 FLUE TUBE The flue is a component of the cooling unit It must be cleaned periodically at least once a year To clean remove flue cap and flue baffle then cover the burner and clean by using a flue brush Domet ic Part No 0151404001 If the flue tube becomes coated with scale or residue from combustion of LP gas the efficiency of gas operation decreases NOTE After cleaning be sure to
54. rough each hinge See FIG 8 STEP 2 Install the two screws in the top frame A The top decoration panel must be removed from the refrigerator before the screws can be in stalled Open refrigerator door and gently push the tabs out of the hole in the hinge with flat blade screwdriver See FIG 9 26 _ erenosne SERVICE MANUAL B Carefully tilt the top decoration panel and lift up to remove from top frame See FIG 9 USE SCREWDRIVER TO PUSH TABS OUT OF HOLE C Install the second two screws in the top frame as shown in FIG 10 3 Install Screw QS repeat for right side STEP 3 Two screws installed in the rear base See FIG 11 Failure to follow the sequence in securing refrigera tor in the enclosure can cause leakage between the frame and cabinet roncnosne SERVICE MANUAL 9 4 DOOR POSITION The door position can be checked by observing any misalignment of the door in relation to the frame SMOOTH FIT PROPER SEAL e aa NOTE Improper position of the refrigerator door can cause the interior light to stay on when the door Is closed To adjust either door loosen the hinge bracket screws reposition the door then tighten the hinge bracket screws To adjust up or down remove the door and add or remove washers from the lower hinge pin Reinstall door and check for correct clearances 9 5 AMBIENT TEMPERATURE This is the temperature surroundin
55. rtion that surrounds the evaporator coils must be flush to the cabinet at the back of the refrigerator and have a positive seal If the cooling unit is not installed properly remove and install properly RM7030 The refrigerator is secured in the enclosure with six screws and they must be installed in the following order First Two Screws installed on front base Second Two Screws installed in the top frame Third Two Screws installed in the rear base Failure to follow the sequence in securing refrigerator in enclosure can cause leakage between the frame and cabinet NOTE Air leaks will cause insuffi cient cooling as well as rapid forma tion of frost DOME TICL RM7030 RM7732 Refrigerators RM7732 SECURING THE REFRIGERATOR After the refrigerator is mounted in place ensuring a combustion seal at the front frame the refrigerator is to be secured in the enclosure with six screws The screws have to be installed in the following order STEP 1 Two screws installed through the front base which includes the lower front strip installa tion The refrigerator is provided with a lower front strip shipped as a loose part The front strip is to be attached after the refrigerator is set into the cutout opening A Install the lower front strip by maneuvering it under the bottom hinge plates as shown in FIG 7 B Secure the refrigerator and the lower front strip with two screws One screw th
56. s If you DO NOT have continuity replace the motor If you have continuity and the motor runs DO NOT replace 11 7 WATER VALVE This valve is solenoid operated When it is open it releases water from the source to the mold The amount of water is proportional to the length of time the water valve switch is held closed by its timing cam Disconnect power to the appliance remove the wires to the water valve solenoid coil and check for continuity between the two terminals If you have continuity the solenoid is good It takes 10 15 watts to energize the solenoid coil The mold heater and coil are in series When the mold heater is activated this causes the voltage to drop to about 105 VAC at the coil The valve has a flow washer inside which acts as a pressure regulator A strainer is installed to prevent dirt rust etc from entering the valve Check for any debris which might obstruct the flow of water or prevent the valve from closing completely when the circuit is not energized Remove any obstructions If the valve still fails to operate properly replace it WATER VALVE VALVE BODY e WASHER SOLENOID COIL STRAINER DIAGNOSTIC SERVICE MANUAL DOMETIC RM7030 RM7732 Refrigerators 11 8 ICE MAKER ASSEMBLY OPERATION It may be necessary to replace the entire ice maker While the operation of the ice maker is fairly simple an assembly understanding of its cycle is necessary for the service technician to dia
57. ss assemblyBEFORE replacing the upper circuit board or wiring harness The checks are to be done with the wiring harness REMOVED from the lower circuit board and the OFF ON switch turned to ON With the mode switch manually depressed Resistance should be indicated between the brown terminal on the 10 pin connector negative U lead from meter to the yellow terminal on the 7 pin connector positive lead from meter The proper resistance is approximately 26 000 ohms With the mode switch NOT depressed A reading would NOT be indicated NOTE If the check on the delay mode lamp and switch is not 7 Pin correct verify the wire harness has continuity If wire harness is good replace the upper circuit board H GAS MODE LAMP AND SWITCH NOTE The following checks should be made on the upper circuit board and harness assemblyBEFORE replacing the upper circuit board or wiring harness The checks are to be done with the wiring harness REMOVED from the lower circuit board and the ON OFF switch turned to ON With the mode switch manually depressed Resistance should be indicated between the brown terminal on the 10 pin connector negative O lead from meter to the green terminal on the 7 pin connector positive lead from meter The proper resistance is approximately 26 000 ohms YE ar i BROWN 10 Pin GREEN With the mode switch NOT depressed A reading would NOT be indicated 7 Pin
58. ss the thermostat NOTE Use care when doing this test Do not short to thermostat casing Also remove jumper after testing is completed If the above test allows the refrigerator to operate and or the continuity test proves the thermostat to be defective replace the thermostat A defective thermo stat would cause Insufficient cooling no cooling or freezing on all modes DOME TICL RM7030 RM7732 Refrigerators 5 2 THERMISTOR RM7030 Prod No 921890401 and RM7732 To determine if the temperature sensor is functioning properly perform the following test Remove the cover from the lower circuit board Discon nect the thermistor harness from the P2 2 pin terminal on the lower circuit board Place thermistor in a glass of ice water Wait 2 to 3 minutes Using an ohm meter place a probe on each terminal point You should get a reading of approximately 7 000 to 10 000 ohms Normal failure for this type of device Is to have a very high resistance A defective thermistor could cause an over cooling condition on all modes Thermistor unplugged fr PC THERMISTOR ADJUSTER TOTHERMISTOR NOTE Dometic refrigerators do not come equipped with a thermistor adjuster This is an add on component erenosne SERVICE MANUAL 5 3 THERMISTOR ADJUSTER RM7030 Product No 921890401 and RM7732 The thermistor adjuster is a resistor type component that attaches between the thermistor and the lower board Its function is t
59. tor system ammonia is liquefied in the finned condenser coil at the top of the refrigerator The liquid ammonia then flows into the evaporator inside the freezer section and is exposed to a circulating flow of hydrogen gas which causes the ammonia to evaporate creating a cold condition in the freezer The tubing in the evaporator section is specifically sloped to provide a continuous movement of liquid ammonia downward by gravity through this section If the refrigerator is operated when it is not level and the vehicle is not moving liquid ammonia will accumulate in sections of the evaporator tubing This will slow the circulation of hydrogen and ammonia gas or in severe cases completely block it resulting in a loss of cooling Any time the vehicle is parked for several hours with the refrigerator operating the vehicle should be level to prevent this loss of cooling The vehicle needs to be leveled only so it is comfortable to live in no notice able sloping of floors or walls When the vehicle is moving the leveling is not critical as the rolling and pitching motion of the vehicle will pass to either side of level keeping the liquid ammonia from accumulating in the evaporator tubing 9 2 VENTILATION Ventilation is one of the requirements for proper cooling unit operation The coach vent system must be able to provide a way to direct the hot air produced by the action of the cooling unit out away from the Installation of th
60. ust it toward MIN or MAX to obtain the desired cabinet temperatures Remember at the MAX setting the heating element burner Is running continuously and the lower cabinet temperatures are obtained 1 2 RM7030 Product No 921890401 AES DISPLAY PANEL AES MODE 1 Move the AES mode selector button 2 to the DOWN position If 120 volts AC is available the AC mode indicator lamp A will illuminate indicating AC operation If 120 volts AC is not available the GAS mode indicator lamp C will illuminate and the control system will automatically switch to GAS operation 2 Ifthe CHECK indicator lamp D illuminates and the GAS mode indicator lamp C is off the controls have failed to ignite the burner in the GAS mode GAS operation may be reset by pressing main power ON OFF button 1 to the OFF then ON position roncnosne SERVICE MANUAL 3 Press the TEMPERATURE SELECTOR button 3 until the lamp at the desired position is illuminated 4 When operating in the AES mode the AES mode indicator lamp B will illuminate The control system will automatically select between AC and GAS operation with AC having priority over GAS Either the AC indicator lamp A or the GAS indicator lamp C will illuminate depending on the energy source selected by the control system If the control system is operating with AC energy and it then becomes unavailable the system will automatically switch to GAS As soon as AC becomes available
61. wo leads with a properly calibrated ohm meter This check is to be done with the heating ele ment at room temperature The proper ohms for each of the two RM7030 and RM7732 heating elements is 69 with a tolerance of ten percent If the resistance is outside the tolerance range replace the heating ele ment SECTION 4 DC VOLTAGE REQUIREMENTS A RM7030 Product No 921890201 amp 921890301 For the refrigerator to operate on any mode DC voltage must be supplied to the terminals at the rear of the refrigerator and must be connected directly to the battery of the RV The operational range is 10 5 to 15 volts DC Connecting the refrigerator to an unregulated converter can result in improper operation of the refrig erator Do not use the body or chassis of the RV as a substitute for either of the two conductors Proper polarity is crucial for the operation of the refrigerator Check for proper voltage at the positive and negative DOMETICL RM7030 RM7732 Refrigerators terminals at the back of the refrigerator If power is outside the operational range correct the power supply problem The power supply to the refrigerator must be fused Maximum fuse size 5 amps With the refrigerator operating on AC or gas mode if voltage to the refrigerator slowly drops to or below 9 5 volts DC the gas flame will come on and will not be thermostatically controlled Low DC volts below 9 5 could cause over cooling B RM7030 Prod No
62. ycle the arm is raised and lowered during each of the two revolutions of the timing cam If the shutoff arm comes to rest on top of the ice in the storage bin during either revolution the switch will remain open and stop the ice maker at the end of that revolution The arm has a manual shutoff built into the linkage by raising the arm as high as possible it will lock in that position until forced down If the arm and switch do not operate properly check for damage and repair or replace parts as necessary SS ARM DOWN ed ARM UP STOPS EEMAKER OPERATION WILL OPERATE 11 5 MOLD SWITCHES These three switches are single pole double throw style They are identical and interchangeable The holding switch assures completion of a revolution once a cycle has started The water valve switch opens the water valve during the fill stage of the cycle NOTE This is the only adjust able component of the ice maker If you use a double throw switch DO NOT use the N O terminal The shutoff switch stops the ice maker s operation when the storage bin is full Shutoff SWITCH MOTOR MOUNTING PLATE TIMING CAM WATER VALVE SWITCH HOLDING SWITCH 30 ersnosne SERVICE MANUAL 11 6 TIMING MOTOR This is a low wattage stall type motor which Is geared to the timing cam and Ice ejector It is a one RPM motor To check the motor disconnect power to the appliance and test for continuity between the two lead

Download Pdf Manuals

Related Search

Related Contents

  Archos AV300 Series Camcorder User Manual    MPC750 RISC Microprocessor Family User`s Manual  MFS8  Voigtlander Bessa R2M Instruction Manual  シスアルチ 取扱説明書 -  How to handleiding - Philips StorageUpdates  

Copyright © All rights reserved. Failed to retrieve file