Dometic RM 8 Series Service Manual
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Dometic RM 8 Series Service Manual

Absortion refrigerator for leisure vehicles
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See also: Operating Manual , Instruction and Installation Manual
DOMETIC GMBH
TECHNICAL DOCUMENTATION
SERVICE MANUAL
SIEGEN
DOMETIC ABSORTION-
REFRIGERATOR
–
for
LEISURE VEHICLES
the
new
8 series
RM 8XXX
TD MBA 2007-10
EN

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Summary of Contents for Dometic RM 8 Series

  • Page 1 DOMETIC GMBH TECHNICAL DOCUMENTATION SERVICE MANUAL SIEGEN DOMETIC ABSORTION- REFRIGERATOR – LEISURE VEHICLES 8 series RM 8XXX TD MBA 2007-10...
  • Page 2 Content Page TD S3 MODELS OPERATING TD S21 TD S32 COMPONENTS INSTALLATION TD S39 SERVICE + MAINTENANCE TD S46 TD S2...
  • Page 3 MODELS TD S3...

  • Page 4: Description Of Models

    MODELS Description of models L = with interior light RM(S)(T) 8400 L 0 = manual ignition (battery Refrigerator Mobile igniter) 1 = Automatic ignition series S = housing with 5 = Automatic ignition and step automatic energy selection T = TecTower 4 = width 486 mm 0 = Standard Depth D = large...

  • Page 5: Model Description

    MODELS Model Description RM(S)8xx1 85-122 l RM(S)8xx5 85-122 l Width of Housing: 486 mm or 525 mm Height: 821 mm Depth: 568mm, 623mm or 633mm Fridges of the 8-series are only available with curved door TD S5...
  • Page 6 MODELS Model Description RM(S)8xx0 Battery Igniter 85-122 l Width of Housing: 486 mm or 525 mm Height: 821 mm, Depth: 568 mm, 623 mm or 633 mm Fridges of the 8-series with manual ignition are provided with a battery igniter and a Gas-Operation-Indicator (Galvanometer) TD S6...
  • Page 7 MODELS Special Features RM 8xxx The housing of the fridge RM 8xxx consists of absolute plastic material (Polystyrene) and is equipped with carrying handles on the side. Due to this a decrease of weight of ca. 1.5 kg is achieved compared to similar models like RM 7401 or RM 7405.
  • Page 8 MODELS Special Features RM 8xxx Building in the fridge, please note, that the feet are not screwed onto the housing anymore, but are injected directly onto it. Thus, when building in the fridge, it is not possible anymore to save 8mm height by taking off the feet.
  • Page 9 MODELS Special Features RM 8xxx The color of the inner liner is not papyrus white anymore, but white. The shelves and the vegetable bin are ice-blue. An innovative shelf system enables individual usage of the cooling compartment. The shelves and the bin are dishwasher-suitable.
  • Page 10 MODELS Special Features RM 8xxx In all single-door RM 8xxx fridges, the freezing compartment can be taken out if needed. This increases the capacity as well as the cooling performance in the cooling compartment. TD S10...
  • Page 11 MODELS Special Features RM 8xxx RM 8xxx with removable Locking of freezing compartment freezer compartment TD S11...
  • Page 12 MODELS Special Features RM 8xxx All RM 8xxx fridges have a new door lock. By pushing the locking button the door is opened. Closing the door the locking bar snaps in and the door is locked. For using the locking button, the panel is formed asymmetric (recess on one side).
  • Page 13 MODELS Special Features RM 8xxx The locking bar inside the door is fixed with two screws, which are behind a plastic cover. The gear rods inside the door are not exchangeable. The lock in the fridge is exchangeable. It also contains the fridge lighting, which was converted into a long-living LED-lighting.
  • Page 14 MODELS Special Features RM 8xxx Purchasing an RM 7xxx or an RM 8xxx, there is the option of an electrical door- lock. When the fridge door is closed, it is kept shut by a magnetic sealing, but not locked. Starting the engine, the electronics will automatically lock the fridge door, due to the recognition...
  • Page 15 MODELS Special Features RM 8xxx All RM 8xxx fridges are equipped with new door hinges made of metal with a plastic casing (polystyrene). This hinges are not screwed onto the housing anymore, but snap in. Thus it is not necessary anymore to adjust the height.
  • Page 16 MODELLE Special Features RM 8xxx Changing the decor plate, the door has not to be demounted anymore. It can be changed easily: Loosen the plastic ledge on the locking side carefully. This ledge is only snapped in, but not screwed onto the housing.
  • Page 17 MODELS Special Features RM 8xxx The operation panel can be loosened with two screws, when the door is opened. The electronics at the RM 8xx1 and RM 8xx5 is screwed into the panel from the inside. If the fridge is demounted, the operation panel including the holding device can be loosened very easily.
  • Page 18 MODELS Special Features RM 8xxx If the fridge is equipped with a battery igniter, as with the 7xxx – generation, a V85 Gas / electro fitting and the known energy-selection switch are used. Also, the RM 8xxx fridges are equipped with a galvanometer, which indicates if the flame is burning. At all single-door fridges of the 8-series, the main connecting block is positioned on the top of the housing.
  • Page 19 MODELS Special Features RM 8xxx On the backside of the 8-series fridges the same components are used as with the 7xxx- Generation. Cooling unit, gas valve GV 100, burner control device P810, burner and heating elements are identical. The cooling unit and the components are screwed onto a metal sheet plate, which is fixed onto the back side of the...
  • Page 20 MODELS Special Features RM 8xxx The electronics were completely renewed. Instead of using a semiconductor, as with Electronics Electronics AES III or MES, the new generation uses a microprocessor. The AES- models are equipped with a 7-segment-display. If an error occurs, there is an acoustic signal.
  • Page 21 OPERATION TD S21...
  • Page 22 OPERATION Interior light If the door is left opened, the lighting switches off automatically after 2 minutes. Dimming function of the indications on the operation panel 10 seconds after the button has been pushed for the last time, the indication (LED) switches into the dim-mode.
  • Page 23 OPERATION 120 V Mode on/off Temp door 12 V Description of the Display: 5-step LED-Indication for inner temperature Pushing the button ON/OFF and mode- selection (5 LEDs = max. Setting) selection-button longer than 2 seconds LED-Indication for „Door locked“ (only for = ON/OFF electrical lock) Pushing the button <2 Seconds =...
  • Page 24 OPERATION 120V-Operation mode (AC-Mode) The 120V-operation mode is selected by pushing the button 1 (see TD S23). The button has to be pushed several times, until the LED next to the Symbol of the power plug lights up. Detection of undervoltage while operating with 120V The controlling electronics is equipped with a detection of undervoltage.
  • Page 25 OPERATION 12V-operation mode (DC-Mode) The 12V-operation mode is selected by pushing the button 1 (see TD S23). The button has to be pushed several times, until the LED next to the Symbol of the battery lights up Detection of undervoltage while operating with 12V The controlling electronics is equipped with a detection of undervoltage.
  • Page 26 OPERATION Gas-operation mode The 12V-operation mode is selected by pushing the button 1 (see TD S23). The button has to be pushed several times, until the LED next to the Symbol of the Gas lights up or the (AES-) display indicates GAS. Ignition while operating with gas.
  • Page 27 OPERATION Mode ON/OFF Temp door Description of the Display: Pushing the button ON/OFF and Mode-selection-button 5-step LED-Indication for inner temperature longer than 2 seconds = ON/OFF selection (5 LEDs =max. Setting) Pushing the button <2 Seconds = Selection next mode LED-Indication for „Door locked“...
  • Page 28 OPERATION 120V-operation mode (manual) The 12V-operation mode is selected by pushing the button 1 (see TD S27). The button has to be pushed several times, until the 7-segment-display indicates 120. Detection of undervoltage while operating with 120V The controlling electronics is equipped with a detection of undervoltage. Conditions: - Limit value: 103 V AC (min.
  • Page 29 OPERATION 12V- operation mode (manual) The 12V-operation mode is selected by pushing the button 1 (see TD S27). The button has to be pushed several times, until the 7-segment-display indicates 12V. D+ or S+ is not taken into account in the manual mode. Detection of undervoltage while operating with 12V The controlling electronics is equipped with a detection of undervoltage.
  • Page 30 OPERATION Gas-operation mode (manual) The gas operation mode is selected by pushing the button 1 (see TD S27). The button has to be pushed several times, until the 7-Segment display indicates GAS. Ignition while operating with gas The controlling electronics initiates max. 3 ignition attempts in the following cycle: 25 sec.
  • Page 31 OPERATION Automatic Mode The automatic mode is selected by pushing the button 1 (see TD S27). The button has to be pushed several times, until the 7-segment display indicates AU. The display switches from AU to the current energy mode every 10 seconds. - Priority 12V-Solar 120V...
  • Page 32 COMPONENTS TD S32...
  • Page 33 COMPONENTS Electronics POWER MODULE Contacts X 105 X 114 X 108 X 110 X 111 X 109 J4 / J5 J1/ J2 X 102 X 101 X105 = 12 V Supply / - Wiring Recognition of heating element X114 = Reed switch or alt. electr. lock Fuse 1A Connection X108 = Temperature sensor (NTC)
  • Page 34 COMPONENTS Electronics POWER MODULE Contacts J4 / J5 J1/ J2 X 105 X 114 X 108 X 110 X 111 X 106 X 109 X 102 X 101 Fuse 1A RF Module for RMCD Connection to Beeper (250V) remote control Display X106 = D+/Solar X105 = 12 V Supply / - Wiring...
  • Page 35 COMPONENTS Burner Control Device P810 includes Igniter ( 20-30 sec.) Flame control and Flame failure device Gas valve control (stops ignition and gas input in case of gas fault) Power supply : approx. 1.3V TD S35...
  • Page 36 COMPONENTS Gas (Safety)-Valve GV100 includes 2 serial mounted gas valves Power supply: approx. 1.3V - 1.5V per valve (if switched on approx. 0,7V -09V) TD S36...
  • Page 37 COMPONENTS Gas Burner Device Already installed Igniting electrode (1) Ionization electrode (2) and ground contact (3) on burner chassis TD S37...
  • Page 38 COMPONENTS Temperature sensor (NTC) Installed at lower reevaporator All operation modes (DC/AC/GAS) are controlled thermostatically. TD S38...
  • Page 39 INSTALLATION TD S39...
  • Page 40 INSTALLATION INSTALLATION Scheme of connecting points 120V-wire – connection to electronics Connection power supply 12VDC D+ and S+ Signal 12VDC Power supply Heating element Gas supply TD S40...

  • Page 41: Electrical Installation

    INSTALLATION Electrical Installation First of all, please note the INSTALLATION INSTRUCTIONS. Some important points: Power line connection protection with a 2A fuse Battery connection protection with a 16A fuse The electric circuit of the 12V-heating element has to be switched via an appropriate relay, so the heating element is not supplied anymore, after the engine has been turned off.
  • Page 42 INSTALLATION INSTALLATION Electrical Installation Terminal block AES-Model black: - cable 12V-permantent connection for electronics violet: + cable 1 2 3 4 5 6 12V-permanent connection for electronics D+ cable to contact X106 on the electronics S+ cable to contact X106 on the electronics white: -cable for 12V heating element...
  • Page 43 INSTALLATION INSTALLATION Electrical Installation TD S43...
  • Page 44 INSTALLATION INSTALLATION Electrical Installation TD S44...

  • Page 45: Gas Installation

    INSTALLATION Gas installation First of all, please note the information of the INSTALLATION INSTRUCTIONS. The gas connection to the appliance has to be done with a cutting ring connection L8, DIN 2353-ST acc. to EN 1949 (e.g.. Ermeto). Burner control device (1) Gas valve (2) Gas connection (3) Gas tube to the burner (4)
  • Page 46 SERVICE + MAINTENANCE TD S46...
  • Page 47 INSTALLATION SERVICE + MAINTENANCE Some information Gas Valve GV100 Masse This component includes two serial mounted gas valves (as part of flame failure device). Power supply : approx. 1.3V - 1.5V per valve Power supply : approx. 0,7V - 0,9V per valve (switched on gas mode) Inductive resistance : per valve ca.
  • Page 48 INSTALLATION SERVICE + MAINTENANCE Some information Burner Control Device P810 Power Supply: ca. 1.3V Measuring points: Flat plug connection between Pin 2 and Pin 3. Cable to Ignition plug : Cable to ionization plug : Exchanging the cables is not possible, as they have different dimensions. TD S48...
  • Page 49 INSTALLATION SERVICE + MAINTENANCE Some information Temperature Sensor (NTC) Table of resistance ° Temperature C/F Resistance kOhm 0/32 27.7 5/41 22.29 10/50 18.07 Measuring Point: Electronics 15/59 14.74 loosen contact X108 20/68 12.11 Cable white / brown 25/77 10.00 When the sensor is defect, the fridge will operate permanently. TD S49...
  • Page 50 INSTALLATION SERVICE + MAINTENANCE Some information Interior light and door lock The Interior light and the door lock are unit, which is exchanged completely in case of a defect. The transparent cover is not included, but a separate part. After removing the cover, the lighting housing can be dismantled.
  • Page 51 The burner and the chimney must be cleaned regularly, at least one time a year. If auto gas is used, Dometic recommends a maintenance every half year, as the contamination risk of the burner is higher, due to the burning of the auto gas.
  • Page 52 SERVICE + MAINTENANCE Service Mode AES The Service Mode is activated by keeping pressed down the temperature button and switching on the main button. After this the 7-Segment-Display shows „1“. By pushing the temperature button, the different test-steps can be activated: 1 = activates 120 V heating element (120V must be available) 2 = activates 120V relay (120V has not to be necessarily available) 3 = activates 12 V heating element (D+ and 12V supply has to be available)
  • Page 53 SERVICE + MAINTENANCE Service Mode AES 8 = Intern test step (is not indicated) 9 = Recognizing electrical lock or reed switch 10 = activates all 7 segment-components one after the other 11 = activates all LED´s Exiting the diagnosis mode: Push „mode“ button or wait for 10 minutes. TD S53...
  • Page 54 SERVICE + MAINTENANCE Controlling the interior light via reed switch The AES-Electronics uses the X114 and X111 as well for controlling the reed switch as well as the electrical lock. The electronics will recognize the application of a reed switch, following the below steps: 1.
  • Page 55 SERVICE + MAINTENANCE Electrical door lock Optionally, 2 electrical door locks can be controlled. They are connected to X111 and X114 (it does not matter in which order; X111 and X114 are equivalent) In the service mode the electronics will recognize the locks, following the below steps: Open the door(s) Choose step 9 in the service mode Close door(s) (Door locks will be recognized)
  • Page 56 SERVICE + MAINTENANCE Failure No 120V, respective under 195V (AC Mode) Failure LED 2 and „120“ (3) flash Acoustic Signal No 12V, respective under 10,5V (DC Mode) Failure LED 2 and „12“ (3) flash Acoustic Signal Ignition without success (Gas Mode) Failure LED 2 and „GAS“...
  • Page 57 SERVICE + MAINTENANCE *Sequence for recognizing „Heating element defect“: Conditions: Interior temperature >18/64°C/F, corresponding relay is switched on (120V or 12V), door has to be closed for longer than 5 minutes. Temperature of reevaporater (a) is recorded After 2 hours, the temperature (b) is recorded again, if the fridge is in the same mode If the temperature difference a-b <...
  • Page 58 SERVICE + MAINTENANCE Service Mode MES The Service Mode is activated by keeping pressed down the temperature button and switching on the main button. After this all 3 mode-LEDs (3) light up. By pushing the temperature button (6), the different test-steps can be activated, test steps 1-6 are indicated by the temperature LEDs (4) 1 = activates 120 V heating element (120V must be available) 2 = activates 120V relay (120V has not to be necessarily available)
  • Page 59 SERVICE + MAINTENANCE Service Mode MES 7 = Recognition sequence (Reed switch or electrical lock) 8 = activates temperature LEDs (4) 9 = activates lock and failure LED (2) + (5) Exiting the diagnosis mode: Push the „mode“ button or wait for 10 minutes. TD S59...
  • Page 60 SERVICE + MAINTENANCE Controlling the interior light via reed switch The MES-Electronics uses the X114 and X111 as well for controlling the reed switch as well as the electrical lock. In the Service mode, the electronics will recognize the application of a reed switch, following the below steps: 1.
  • Page 61 SERVICE + MAINTENANCE Electrical door lock Optionally, max. two electrical door locks can be controlled. They are connected to X111 and X114 (Notify, that if there is only one lock this has to be connected to X111). In the service mode the electronics will recognize the locks following the below steps: Open the door(s) Choose step 7 in the service mode Close the door(s)

  • Page 62: Error Messages

    SERVICE + MAINTENANCE Error messages Error No 12V, respective under 10,5V (DC Failure LED 2 and LED 3 (DC Mode) flash Mode) Ignition without success (Gas Mode) Failure LED 2 and LED 3 (Gas Mode) flash NTC sensor defect Failure LED 2 and temperature – LEDs 4 flash 120V heating element or cooling unit Failure LED 2, LED 3 (AC Mode) and defect*...
  • Page 63 SERVICE + MAINTENANCE *Sequence for recognizing „heating element defect“: Conditions: Interior temperature >18/64°C/F, corresponding relay is switched on (120V or 12V), door has to be closed for longer than 5 minutes Temperature of reevaporator (a) is recorded After 2 hours, the temperature (b) is recorded again, if the fridge is in the same mode.
  • Page 64 INSTALLATION DOMETIC GMBH DOMETIC GMBH TECHNISCHE DOKUMENTATION TECHNISCHE DOKUMENTATION IN DER STEINWIESE 16 IN DER STEINWIESE 16 57074 SIEGEN 57074 SIEGEN GERMANY GERMANY www.dometic.com www.dometic.com...
  • Page 65 This manual has been provided courtesy of My RV Works, Inc. www.myrvworks.com You can find more RV service manuals here: www.myrvworks.com/manuals Over the years of running a mobile RV repair service, having a dedicated place to access service manuals for all the different appliances and components found on RVs was something that I always had a desire to create.

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