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SERVICE TIPS
OS1927 4/96
Copyright 1996 The Dometic Corporation
REFRIGERATORS
Models
RM2612
RM2652
RM2812
RM2852

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Summary of Contents for Dometic RM2612

  • Page 1 SERVICE TIPS 81 Dometic REFRIGERATORS Models RM2612 RM2812 RM2652 RM2852 OS1927 4/96 Copyright 1996 The Dometic Corporation...
  • Page 2: Refrigerator Section

    THE MOST COMMON SYSTEM PROBLEMS ASSOCIATED WITH THE RM2612, RM2812, RM2652, RM2852 REFRIGERATORS CAUSE SYMPTOM REFRIGERATOR SECTION No operation no panel lights Operation DC Volts Fuse Wiring Upper Circuit Board Lower Circuit Board Operation No operation has panel lights DC Volts Thermistor Fuses Wiring...
  • Page 3 CAUSE SYMPTOM LP Gas - cools Insufficient cooling on Gas properly on Orifice AC mode. Flue Baffle Flue Tube Burner Lower Circuit Board Operation Freezes. Thermistor Lower Circuit Board DC Volts 9. Check light on. Wiring LP Gas Manual Gas Valve Solenoid Orifice Burner...
  • Page 4: Display Panel

    (RM2652, RM2852) LEGEND 2-WAY MODEL Main Power Button ON/OFF AUTO/MANUAL Mode Selector Button A. AUTO Mode indicator lamp B. CHECK indicator lamp (Gas Mode Only) C. Climate control switch Dometic o CHECK AUTO\0 (IIfzl = OFF REFRIGERATOR CONTROL MANUAL LEGEND...
  • Page 5: Start-Up Instructions

    START-UP INSTRUCTIONS Before starting the refrigerator, check that all the manual gas valves are in the ON position. DO NOT forget the manual shutoff valve on the rear of the refrigerator. This refrigerator is equipped with a control system, which can automatically select the most suitable energy source which is available, either 120 Volt AC or LP gas operation.
  • Page 6: Manual Mode

    If 120 volts AC becomes available while the CHECK indicator lamp is on, the control system will switch to 120 volt AC operation, The CHECK lamp will not turn off until the main power ON/OFF button is pressed to the OFF then ON position. In AUTO mode operation, the temperature is controlled by a single temperature setting.
  • Page 7: D C V O L T A G E R E Q U I R E M E N T S

    COMPONENTS- HEATING ELEMENT Remove the heater leads from the lower circuit board and measure for proper resistance across the two leads. You should obtain the following readings, *lo%: OHMS WATTS VOLTS RM2612 RM2652 RM2812 RM2852 D C V O L T A G E R E Q U I R E M E N T S Clean Direct Current (DC) power is mandatory for high-tech circuits to operate as designed.
  • Page 8 The operational range of the unit is a minimum of 9.6V DC to a maximum of 22V DC. At 22V DC, the unit will automatically shut down until voltage has decreased to 18V DC for proper operation; however, the panel lights will continue to illuminate until voltage has dropped to 4V DC or below. Do not use the body or chassis of the RV as a substitute for either or the two conductors.
  • Page 9: Solenoid Valve

    SOLENOID 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 tolerance range of ten percent. 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-ianition.
  • Page 10: High Voltage Cable

    UPPER CIRCUIT BOARD 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. With main ON/OFF switch on display panel in OFF position: Check for DC voltage at Plug 1, Terminal 4 (orange wire) and terminal 5 (red wire) negative (-) DC on the lower circuit board.
  • Page 11 Next, do the same voltage test at the lower circuit board. Red wire (-) negative plug 1, terminal 5, to green wire, plug 1, terminal 1 and black wire, plug 1, terminal 3. If there is no voltage and you had voltage on previous test, the cable assembly is defective.
  • Page 12 DC VOLT: ALL TESTS ARE TO BE DONE WITH THE REFRIGERATOR IN THE COOLING MODE. Measure volts between terminal J4 and the ground strip. AC MODE: Check that incoming AC voltage is present at terminals J5 and J6 on the circuit board. Check for voltage at the heating element connection terminals J7 and J8 on the circuit board.
  • Page 13: Climate Control Heater

    CLIMATE CONTROL HEATER 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. To check the heater itself, do an ohms resistance reading on the heater wire by using a properly calibrated ohm meter.
  • Page 14: Lp Gas Components

    SECTION 7 LP GAS COMPONENTS MANUAL GAS SHUTOFF VALVE To check the shutoff valve, remove and inspect for any obstructions. Manual Gas Connection Shutoff Valve Shown in “ON” position) RM2652 & RM2852 Gas Connection Manual Gas Shutoff Orifice Valve (Shown in “ON” Position) Pressure Test Port ORIFICE...
  • Page 15 RM2852 1-7/8" FLUE TUBE The flue tube must be cleaned periodically. Remove flue cap and flue baffle, then cover the burner and clean by using a flue brush, Dometic Part No. 0151404001, WIRING 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.
  • Page 16 @--PROTECTIVE @ - B U R N E R H O U S I N G EARTH @CHASSISGROUND &K%:~" @-CICCUI~ BOARD DISPLAY -@SOLENOID @-CIRCUIT VALVE BOARD POWER *SWITCH @--ELECTRODE @-SWITCH @ F U S E *TERMINAL BLOCK @-FUSE 5A @ - T 120V H E A T E R E S T...
  • Page 17: Air Leaks

    AIR LEAKS Check the gasket on the doors to be sure of a positive air seal. Close the door on a dollar bill, then pull the dollar bill out. If a gasket is not sealing properly, warm the gasket material with a hair drier. Close the door and the magnetic strip should pull the gasket to the metal frame.
  • Page 18 C. When the front strip is in place, install one screw through the hinge and into the floor. The second screw is installed with a washer on the opposite side. Second: Install the two screws in the top frame. A.The top decoration panel must be removed from the refrigerator before the screws can be installed.
  • Page 19: Door Position

    D. Replace the top decoration panel. Third: Two screws installed as shown in rear base. DOOR POSITION The door position can be checked by observing any misalignment of the door in relation to the frame. Loosen the hinge bracket screws, reposition the door then tighten the hinge bracket screws. To adjust up or down, add or remove washers from the lower hinge pin.
  • Page 20: Food Storage

    To check the cooling unit, first verify the AC heating element is good. Then place approximately one gallon of water inside the refrigerator and place a thermometer in one of the containers of water. Supply volts direct to the AC heating element and operate for at least 12 hours. Check the tem- perature on the thermometer.

This manual is also suitable for:

Rm2652Rm2812Rm2852

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