Dometic RM7030 Service Manual
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Dometic RM7030 Service Manual

Dometic RM7030 Service Manual

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form No. 3 106938.008 2/96 (Replaces OS1 684)
Foreword
This service manual is the result of the
dedication of The Dometic Corporation and
engineers
its
in giving
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.
service people the
.

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Summary of Contents for Dometic RM7030

  • Page 1 Foreword This service manual is the result of the dedication of The Dometic Corporation and engineers service people the in giving 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.

  • Page 2: Table Of Contents

    DC VOLTAGE DC Voltage Requirements ............. 9 SECTION 5 DC COMPONENTS Thermostat: RM7030 (Prod. No. 921890201 & 921890301) ..9 Thermistor: RM7030 (Prod. No. 921890401) & RM7732 ..10 Thermistor Adjuster: RM7030 (Prod.No. 921890401) & RM7732 10 Solenoid Valve ..............10 Igniter ................
  • Page 3 DOMETIC® RM7030/RM7732 DIAGNOSTIC SERVICE MANUAL Refrigerators CONTENTS PAGE NO. SECTION 8 WIRING External Wiring ..............21 Internal Wiring ..............21 SECTION 9 OTHER Leveling ................25 Ventilation ................. 25 Air Leaks ................25 Door Position ..............27 Ambient Temperature ............27 Cooling Unit ..............

  • Page 4: Section

    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.
  • Page 5 Air Leaks 15. Water on frame. Interior Liner to Frame High Humidity Air Leaks 5.12 Climate Control Heater RM7030 (Prod. No. 921890401) & RM7732 1.1B or 1.2 Operation 16. No operation – no panel lights DC Volts Fuse 8.1 & 8.2...
  • Page 6 Heating Element Lower Circuit Board 22. Insufficient cooling on gas – cools properly on LP Gas Orifice Flue Baffle Flue Tube Flue Cap (RM7030 Only) Burner Lower Circuit Board 23. Freezes. Thermistor Thermistor Adjuster E,F,G Lower Circuit board Upper Circuit Board 24.

  • Page 7: Section

    DOMETIC® RM7030/RM7732 DIAGNOSTIC SERVICE MANUAL Refrigerators SYMPTOM CAUSE REFER TO STEP 26. Interior light on when door is closed. Wiring 5.10 Door Switch Door Position 27. Rapid formation of frost. Food Storage Interior Liner to Frame High Humidity Air Leaks 28.

  • Page 8: Rm7030 (Prod. #921890201 & 921890301) Refrigerator Operation

    Turn switch "C" to the "ON" position and press push- button "B". The green indicator lamp over push-button RM7030 (Product No. 921890201 & 921890301) "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...

  • Page 9: Rm7030 (Prod. #921890401) Refrigerator Operation

    DOMETIC® RM7030/RM7732 DIAGNOSTIC SERVICE MANUAL Refrigerators FLAME FAILURE DURING LP GAS LOW VOLTAGE MONITOR OPERATION The AES system requires 12 volts DC power at all times If the LP gas flame fails during the burner cycle, the to operate properly. The DC power must be 9.5 volts high voltage spark will continue arcing for up to three DC or higher.

  • Page 10: Rm7732 Refrigerator Operation

    DOMETIC® RM7030/RM7732 DIAGNOSTIC SERVICE MANUAL Refrigerators If for some reason the display module becomes non- 3. Press the TEMPERATURE SELECTOR button (3) functional, the control system will revert to fully auto- until the lamp at the desired position is illuminated.
  • Page 11 DOMETIC® RM7030/RM7732 DIAGNOSTIC SERVICE MANUAL Refrigerators GAS MODE GAS MODE Move the AUTO mode selector button (2) to the UP When operating in the GAS mode, the AUTO mode position. The GAS mode indicator lamp (C) will illumi- indicator lamp (B) will be off and the GAS mode indica- nate.

  • Page 12: Ac Voltage Requirements

    The proper ohms for each of at the positive and negative terminals at the back of the the two RM7030 and RM7732 heating elements is 69, unit. If the voltage is outside the operational range, with a tolerance of ten percent. If the resistance is correct the power supply problem.

  • Page 13: Thermistor: Rm7030 (Prod. No. 921890401) & Rm7732

    The proper reading would be 49 ohms with a tolerance TO THERMISTOR range of ten percent. TO THERMISTOR NOTE: Dometic refrigerators do not come equipped with a thermistor adjuster. This is an add-on component.

  • Page 14: Igniter

    Plug 3, B. RM7030 (Product No. 921890401) and RM7732 Terminal 1 and 2 on lower circuit board have DC volts (9 or more). If the valve chatters, check for low input The igniter is an electronic device that produces high voltage to the valve (below 9V DC).

  • Page 15: Fuses

    Refrigerators FUSES CONTINUITY should be indicated between BROWN A. RM7030 (Product No. 921890201 & 921890301) the brown terminal to the red terminal on the The fuse is to protect the circuit board. To check the 10-pin connector. fuse, remove it from the holder and do a continuity check.
  • Page 16 DOMETIC® RM7030/RM7732 DIAGNOSTIC SERVICE MANUAL Refrigerators B. AES FUNCTION SWITCH With the gas function switch BLUE VIOLET NOTE: The following checks should be made on the manually depressed: CONTI- upper circuit board and harness assembly BEFORE NUITY should be indicated replacing the upper circuit board or wiring harness.
  • Page 17 7-pin connector (positive [+] lead from meter). The proper J. RM7030 (Product No. 921890401) and RM7732 resistance is approximately NOTE: The PAL tester will allow for proper testing of the...

  • Page 18: Lower Circuit Board

    If you experience a problem on any of the above circuit boards. PAL is available from your Dometic checks, verify the fuses on the lower circuit board parts distributor.
  • Page 19 6-pin connector (positive proper testing of the integrity of the upper and lower [+] lead from meter) to the ground strip circuit boards. PAL is available from your Dometic (negative [–] lead from meter). If less than parts distributor.

  • Page 20: Door Switch

    The door switch is an open switch when the switch arm circuit boards. PAL is available from your Dometic is depressed (interior light should be off). When the parts distributor.

  • Page 21: Electrode

    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. RM7030 (Product No. 921890201 & 921890301) TEST PORT RM7030 (Product No. 921890401) and RM7732 SOLENOID VALVE...

  • Page 22: Lp Gas Components

    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 & 921890301) MANUAL GAS Shutoff VALVE RM7030 (Product No. 921890401) and RM7732...

  • Page 23: Orifice

    NOTE: Be sure the tip on the thermocouple is clean. NEVER USE A DRILL BIT OR JET TIP CLEANER TO CLEAN ANY ORIFICE AS THESE DEVICES WILL B. RM7030 (Product No. 921890401) & RM7732 DAMAGE THE FACTORY MACHINED PART AND The thermocouple is a component extending above the CREATE A POTENTIALLY DANGEROUS CONDI- burner assembly so the tip is in the path of the flame.

  • Page 24: Burner

    The length of the flue baffle assembly (flue baffle and to the refrigerator circuit. wire) should be 39 inches on RM7030; 40 inches on RM7732. The flue baffle itself should measure 13/16 INTERNAL WIRING inch wide and 6 inches long on RM7030 and RM7732.
  • Page 25 DOMETIC® RM7030/RM7732 DIAGNOSTIC SERVICE MANUAL Refrigerators TYPICAL WIRING DIAGRAM FOR RM7030 (PRODUCT NO. 921890201 & 921890301)
  • Page 26 DOMETIC® RM7030/RM7732 DIAGNOSTIC SERVICE MANUAL Refrigerators TYPICAL WIRING DIAGRAM FOR RM7030 (PRODUCT NO. 921890401) WHITE YELLOW BLACK BLUE BROWN ORANGE GREEN WHITE WHITE 12V DC 120 VOLTS AC WHITE BLACK GREEN GREEN/YELLOW GREY BROWN BLUE CIRCUIT BOARD POWER RETAINER FOR BURNER...
  • Page 27 DOMETIC® RM7030/RM7732 DIAGNOSTIC SERVICE MANUAL Refrigerators RM7732 TYPICAL WIRING DIAGRAM...

  • Page 28: Other

    DOMETIC® RM7030/RM7732 DIAGNOSTIC SERVICE MANUAL Refrigerators as little open space as possible surrounding the sides SECTION 9 and top of the refrigerator to achieve proper air flow. All OTHER potential dead air pockets should be blocked or baffled to ensure that heat won't be trapped in these spaces LEVELING and reduce efficiency.
  • Page 29 DOMETIC® RM7030/RM7732 DIAGNOSTIC SERVICE MANUAL Refrigerators RM7732: B. Carefully tilt the top decoration panel and lift up to remove from top frame. See FIG. 9. SECURING THE REFRIGERATOR: After the refrigerator is mounted in place (ensuring a combustion seal at the front frame), the refrigerator is to FIG.

  • Page 30: Door Position

    As the humidity is reduced, the sweating will decrease. increases. The RM7030 and RM7732 will maintain High humidity can also be a factor in rapid formation of approximately 43 degrees food storage temperature at frost.

  • Page 31: Interior Liner Seal To Frame

    DOMETIC® RM7030/RM7732 DIAGNOSTIC SERVICE MANUAL Refrigerators INTERIOR LINER SEAL TO FRAME Make sure the refrigerator is dry and that the surface There is a seal that is applied to the liner in the area temperatures are above 50°F. Use a clear silicon...

  • Page 32: Ice Maker Operation

    DOMETIC® RM7030/RM7732 DIAGNOSTIC SERVICE MANUAL Refrigerators SECTION 10 SECTION 11 ICE MAKER OPERATION ICE MAKER COMPONENTS 11.1 MOLD HEATER The refrigerator must be allowed to precool properly The mold heater uses 165 watts to thaw the ice free before starting the ice maker. The refrigerator has to be from the mold.

  • Page 33: Shutoff Arm

    DOMETIC® RM7030/RM7732 DIAGNOSTIC SERVICE MANUAL Refrigerators 11.4 SHUTOFF ARM 11.6 TIMING MOTOR The shutoff arm is cam driven. It operates a switch to This is a low-wattage, stall-type motor which is geared control the quantity of ice produced. During the ejection to the timing cam and ice ejector.

  • Page 34: Ice Maker Assembly

    DOMETIC® RM7030/RM7732 DIAGNOSTIC SERVICE MANUAL 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 understanding of its cycle is necessary for the service assembly.
  • Page 35 DOMETIC® RM7030/RM7732 DIAGNOSTIC SERVICE MANUAL Refrigerators...
  • Page 36 DOMETIC® RM7030/RM7732 DIAGNOSTIC SERVICE MANUAL Refrigerators...

  • Page 37: Ice Maker – Other

    DOMETIC® RM7030/RM7732 DIAGNOSTIC SERVICE MANUAL Refrigerators SECTION 12 ICE MAKER – 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.

  • Page 38: Wiring

    DOMETIC® RM7030/RM7732 DIAGNOSTIC SERVICE MANUAL 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. THIS IS AN ENERGIZED CIRCUIT. ELECTRICAL SHOCK CAN OCCUR.

This manual is also suitable for:

Rm7732

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