Three way fridge/freezer

Discussion in 'Fridges & Ovens' started by Millibobs, Apr 15, 2014.

  1. Millibobs

    Millibobs Funster

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    Hi can anyone point me in the right direction please. I have a dometic fridge/freezer which I think is only working on gas . It should change automatically Any ideas on which part is likely to be broken and is it difficult to repair. Keep hearing about silly high prices for Dometic repairs so have kept putting off this problem.
    :cry:
     
    Last edited: Apr 15, 2014
  2. Roryboys Dad

    Roryboys Dad Read Only Funster

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    Will it work on EHU and engine battery if you set it manually?


    Do you get a flashing light and/or a buzzer sound when it fails to work on EHU and engine battery?


    Does your panel look anything like this -
     

    Attached Files:

  3. MikeD

    MikeD Funster

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    What's the model number? :thumb:
     
  4. Millibobs

    Millibobs Funster

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    Hi no its totally different model no.RM6505 135 L
     
  5. Millibobs

    Millibobs Funster

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    Hi Mike it's RM6505 135L It has never lit up on the function light,but I've assumed it was working until recently when the fridge red light came on when I turned the gas off but had battery or engine running.
     
  6. Millibobs

    Millibobs Funster

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    Still not got to the bottom of this problem ,can anyone be of assistance please
    David:Eeek:
     
  7. Hobbytwo

    Hobbytwo Read Only Funster

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    Hi Millibobs,

    A couple of questions :

    Does the fridge work on EHU alone?
    Does the fridge work on 12v engine running?
    Can you access the rear of the fridge via the external vents?
     
  8. Millibobs

    Millibobs Funster

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    Hi hobbytwo
    Yes I can get to the back of the fridge via ext. vents not sure about the other questions which is why I asked the question. Think it's only working on gas.
    Hope you can understand and help
     
  9. laneside

    laneside Funster

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    It may be difficult if your control switch does not light up but there are four positions with subsequent pressings

    i) 12 volt

    ii) gas

    iii) 230

    iv) AES

    If it just on gas that is all it will run on

    if it is on 230 that is all it will run on

    if it is on 12 volt that is all it will run on but only when the engine is running

    if it is on AES it will run on 230 as priority when on hook up, 12 volt when driving and then should switch to gas about ten minutes after switching engine off.

    May be difficult if the panel is not lighting up to know just where you are set
     
  10. MikeD

    MikeD Funster

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    I suspect you have a manual. :thumb::thumb:


    OPERATING INSTRUCTIONS

    CONTROLS
    FIG. 1
    This refrigerator is equipped with an Automatic Energy
    Selector (
    AES
    ) which controls its operation and energy
    supply.
    The system selects the available energy source in the
    order:
    230-240 V - 12 V - LP gas
    No manual operation is necessary for selecting the
    energy source.
    The control panel is shown in fig.1.
    The refrigerator is set into operation by pushing button
    (
    A
    ) (main switch). The AES LED (
    C
    ) lights green show-
    ing: AES system working. Push- button (
    B
    ) is used for
    setting the electronic thermostat. The thermostat LEDs
    (
    D
    ) shows the chosen temperature position. When there
    is a demand for refrigeration, AES will connect the most
    favourable of the available energy sources.
    Note:
    12 V must always be available to supply the
    electronics.
    STARTING THE REFRIGERATOR
    All references are to fig. 1.
    LP Gas operation
    AES will select LP gas operation under the
    following
    conditions:

    No AC (230-240 V) available

    Engine not running (no high current at 12 V DC
    available)

    AC available
    but too low

    Engine running
    but DC supply too low
    (condition three and four are briefly described in
    item
    Undervoltage operation
    )
    When the system chooses LP Gas operation, the flame
    failure device is automatically opened, allowing the gas
    to flow to the burner. At the same time, the electronic
    igniter is energized.
    After initial installation, servicing, or changing gas cylin-
    ders etc., the gas pipes may contain some air that s
    hould
    be allowed to escape by briefly turning on the refrigerator
    or other appliances. This will ensure that the flame lights
    immediately.
    If the flame goes out (by gust of wind etc.), the igniter is
    immediately activated and reignites the gas.
    Note:
    The control electronics and the igniter must have
    12 V DC supply to operate.
    Gas trouble-shooting
    If the AES LED (C) is flashing red, the system was not
    able to start or continue gas operation. Set the switch
    (A) to "OFF" and check that there is enough gas in the
    gas bottle, that its valve is open and that any valves in
    the gas line to the refrigerator are open.
    Then push button (A) to "ON" again. After 10 sec. AES
    will repeat the ignition sequence. When the AES LED
    (C) again starts flashing red after 30 sec., the t
    rouble
    persists (air in the line, no gas?). Switch (A) briefly off
    and then on again. It might be necessary to repeat this
    operation 2-3 times if the tubing contains air (after
    changing gas bottles, repairs etc.).
    If this does not help, you should consult a service
    technician.
    230-240 V Operation
    When a mains connection is available, AES will select
    this. Please note, that even being in AC mode, 12 V DC
    is necessary for the internal supply of the electronics.
    12 V Operation
    AES will select the 12 V mode of
    operation only when
    the vehicle engine is running (detected by the alternator
    connection of the fridge D+).
    SWITCHING BETWEEN ENERGY
    SOURCES
    When switching from one energy source to another,
    there are some delays implemented in the AES system.
    The 15 min.
    delay between switching off the engine and
    starting gas mode is intended to
    delay the starting of gas
    mode e.g. when stopping at a filling station.
    WARNING: It is not allowed to have a naked
    flame at a gas filling station. If you are not sure,
    that your stop is shorter than 15 min., you are
    advised to switch off the main switch (A), fig. 1,
    when stopping at a filling station.
    Undervoltage operation
    The AES system is designed to guarantee the maximum
    cooling efficiency under any circumstances. Therefore,
    the system monitors continuously the voltage level while
    being in either 12 V DC or 230-240 V AC mode. If the
    voltage is too low, the system switches to Gas mode
    shown by the yellow LED (E in fig. 1.). The system stays
    in Gas mode, until the electrical supply voltage has
    recovered to normal level.
    IF THE REFRIGERATOR FAILS TO WORK
    Check the following points before calling a service tech-
    nician:
    1. that the green AES LED goes on, when the switch
    (A) is set to "ON" (12 V must be available).
    2. when mains are connected but the refrigerator stays
    in gas operation: Is the refrigerator correctly connec-
    ted and is the fuse (230-240 V) intact?.
    3. is the 12 V fuse intact?
    4.
    Disconnect the wall plug, and the 12 V wires
    before servicing.
    Check the fuses on the circuit
    board, (under the black cover at the top of the refrig-
    erator and behind the control panel).
    Remove the two screws holding the control panel,
    pull out the control panel with its electronics. Remove
    the cover and check the fuses.
    5. if the refrigerator does not operate in DC mode when
    the engine is running:
    Is the alternator (D+) connection made correctly?
    6. if the AES LED (C) flashes red: see chapter
    Gas trouble shooting



     
  11. Hobbytwo

    Hobbytwo Read Only Funster

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    Right Millibobs, you've now got something to work on from MikeD !

    These problems can only be solved by a process of elimination on the basis of what's functioning and what's not. After going through MikeD's list, let us know what's happening then. Note that apart from engine 12v running, the other energy sources must have 12v from you leisure battery before they'll "fire up."
     
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