Dometic RM 8401 Service Instructions Manual
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Dometic RM 8401 Service Instructions Manual

Absorption refrigerators for leisure vehicles
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See also: Service Manual , Operating Manual
Service-Instruction
Absorption Refrigerators for Leisure Vehicles
RM 8400 RM 8401 RM 8405 RM 8500 RM 8501 RM 8505 RM 8550 RM 8551 RM 8555
RMS 8400 RMS 8401 RMS 8405 RMS 8460 RMS 8461 RMS 8465 RMS 8500 RMS 8501
RMS 8505 RMS 8550 RMS 8551 RMS 8555 RML 8550 RML 8551 RML 8555 RMSL 8500
RMSL 8501 RMSL 8505 RMD 8501 RMD 8505 RMD 8551 RMD 8555
Publication No.:
599 7192-62 EN
COOL
3110
T.B. MBA 03/2011
N 2
English

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Summary of Contents for Dometic RM 8401

  • Page 1 3110 Absorption Refrigerators for Leisure Vehicles RM 8400 RM 8401 RM 8405 RM 8500 RM 8501 RM 8505 RM 8550 RM 8551 RM 8555 RMS 8400 RMS 8401 RMS 8405 RMS 8460 RMS 8461 RMS 8465 RMS 8500 RMS 8501...

  • Page 2: Table Of Contents

    Table of contents Description of model ........Model identification .
  • Page 3 Overview software changes ........... . Dometic GmbH In der Steinwiese 16 D-57074 Siegen www.dometic.com © Dometic GmbH - 2007-2011 - Subject to change without prior notice...

  • Page 4: Description Of Model

    (battery igniter) 1 = manual energy selection, automatic igni- tion (MES) Dometic refrigerators are equipped for a con- nection pressure of 30 mbar. For connection 5 = automatic and manual energy selection, to a 50 mbar gas system, use Truma VDR automatic ignition (AES) 50/30 medium pressure controller.

  • Page 5: Technical Data

    90 / 8 lit. 95 lit. 135 W / 130 W ca.2,4 KWh / 270 g 27 kg • RM 8401 821x486x568 90 / 8 lit. 95 lit. 135 W / 130 W ca.2,4 KWh / 270 g 27 kg •...

  • Page 6: Description Of Refrigerator

    Description of model Description of refrigerator Fig. 6 Operating controls Door locking button Freezer compartment (removable) Insertable grid shelf (available as option, to be used when freezer compartment is removed) Post-evaporator for cooling compartment Condensation water drain channel Vegetable bin Upper door shelf with flap, egg shelf available as option may be inserted Lower door shelf with bottle holders...
  • Page 7 Description of model Back side RM 8xxx Fig. 7 Power module (electronics) 230V-connection directly to power module Terminal strip for 12VDC supply Burner control device Gas valve Main connection gas supply Gas burner (behind cover)
  • Page 8 Description of model Back side RMD 8xxx Fig. 8 Power module (electronics) 230V-connection directly to power module Terminal strip for 12VDC supply Burner control device Gas valve Main connection gas supply Gas burner (behind cover) Cable to operating panle (front side)

  • Page 9: Terminal Block

    Description of model Terminal block RM 8xxx Connections: geräteseitig A = Ground heating element DC B = Plus heating element DC C = Ground electronics D = Plus electronics D+ S+ – – + D+ = alternator signal S+ = AES -input-control signal (solar charge regulator) fahrzeugseitig Fig.

  • Page 10: General

    Description of model General Additional features RMD 8xxx Failures are indicated by flashing of the red Fridges of the 8-series with manual ignition external failure indicator LED. are provided with a battery igniter and a Gas- Operation-Indicator (Galvanometer ). Should the door be kept open for too long For using the locking button, the panel is for- (more than 2 minutes), the blue external med asymmetric (recess on one side).

  • Page 11: Explanation Of Operating Controls

    Description of model Explanation of operating controls Manual energy selection / manual ignition (RM 8xx0) battery igniter: Fig. 13 Manual energy selection / automatic ignition (RM 8xx1) MES: Mode Fig. 14 Automatic energy selection / automatic ignition (RM 8xx5) AES: Mode Fig.

  • Page 12: Components

    Components 2.0 Components Power modules 2.1.1 Power module RM 8xx1 ( MES) X105 X114 X108 X110 X111 X109 X102 X101 J4/J5 J1/J2 Fuse* 1A / 250V Connection to display Fig. 17 X105 = 12 V Supply / - Wiring Recognition of heating element X114 = Reed switch or alt.

  • Page 13: Power Module Rmd 8Xxx1 (Mes)

    Components 2.1.3 Power module RMD 8xx1 ( MES) X105 X115 X108 X110 X111 X109 X102 X101 J4/J5 J1/J2 Fuse* 1A / 250V Connection to display Fig. 19 X105 = 12 V Supply / - Wiring Recognition of heating element X115 = 3 pin connection from display moduls to external LEDs (operating display) X108 = Temperature sensor (NTC) X110 = Connection to burner control device (+/-, failure) X111 = Door switch for interior light...

  • Page 14: Operating Principle

    Components 2.1.5 Operating principle Temperature sensor NTC NTC - table of resistances The electronics regulates the function of the components according to the selected energy, Temperature °C Resistance in kOhm e.g. power supply for the heating elements. In 27.70 addition the AES-power module ensures the operating with the optimal energy source accor- 22.29 ding to the priority "230V AC - 12V DC - GAS".

  • Page 15: Gas Valve Gv100

    The burner and the chimney must be cleaned regularly, at least one time a year. If Autogas is used, Dometic recommends a maintenance every half year, as the contamina- tion risk of the burner is higher, due to the bur- Fig 22 ning of the auto gas.

  • Page 16: Interior Light And Door Lock

    Components Interior light and Door Lock Electrical door lock (option) The Interior light and the door lock are unit, As an option an electrical door lock was availa- which is exchanged completely in case of a ble which locks the door automatically while the defect.
  • Page 17 Components Recognising interior light and door lock (starting I/2010), all models RM 8xxx and RMD 8xxx The door opening is recognised by a micro switch (1) in the door lock housing. Door closed = contact open Door open = contact closed Fig.

  • Page 18: Wiring Diagrams

    Electrical connections 3.0 Wiring diagrams RM 8xx0 / RMS 8xx0 Fig. 30...

  • Page 19: Rm 8Xx1 / Rms 8Xx1

    Electrical connections RM 8xx1 / RMS 8xx1 Fig. 31...

  • Page 20: Rm 8Xx5 / Rms 8Xx5

    Electrical connections RM 8xx5 / RMS 8xx5 Fig. 32...

  • Page 21: Rm 8Xx5 With Electrical Door Lock

    Electrical connections RM 8xx5 with electrical door lock Fig. 33...

  • Page 22: Rml 8Xx0 / Rmsl 8Xx0

    Electrical connections RML 8xx0 / RMSL 8xx0 Fig. 34...

  • Page 23: Rml 8Xx1 / Rmsl 8Xx1

    Electrical connections RML 8xx1 / RMSL 8xx1 Fig. 35...

  • Page 24: Rml 8Xx5 / Rmsl 8Xx5

    Electrical connections RMSL 8xx5 / RMD 8xx5 Fig. 36...

  • Page 25: Rmd 8Xx1

    Electrical connections RMD 8xx1 Fig. 37...

  • Page 26: Rmd 8Xx5

    Electrical connections RMD 8xx5 Fig. 38...
  • Page 27 Electrical connections...

  • Page 28: Troubleshooting

    Troubleshooting 4.0 Troubleshooting 4.1.1 Status messages on the display Information on failure display and trouble-shooting Refrigerators with an electronics system (MES, AES) indicate the occurence of a mal- function by the LED or display flashing. If a malfunction occurs, the indicator LED "Failure"...
  • Page 29 Troubleshooting...

  • Page 30: Repair & Maintenance

    Repair & Maintenance 5.0 Repair & Maintenance Entering the service mode Step 7: Recognition sequence (Reed switch or electrical lock) Step 8: RM 8xx1 and RM 8xx5 have an internal service activates temperature LEDs (4) mode which can be used for testing and adju- Step 9: sting the interior light or the electrical door lock.

  • Page 31: Displaying Software Versions Of Power Module (Rmd 8Xxx)

    Repair & Maintenance Step 6: Displaying Software versions activates frame heating of power module (RMD 8xxx) Step 7: activates interior lights (Except for electrical The service mode starts with showing all “LEDs lock) on” for 3 seconds, followed by stating the SW Step 8: version status and then service mode sequence Intern test step (is not indicated)

  • Page 32: Sequence For Recognizing "Heating Element Defect

    Repair & Maintenance Sequence for recognizing Recognising the Electrical „Heating element defect“ door lock Optionally, max. two electrical door locks can be Conditions: controlled. They are connected to X111 and X114 Interior temperature >18°C, corresponding re- (Notify, that if there is only one lock this has to lay is switched on (230V or 12V), door has to be be connected to X111) closed for longer than 5 minutes.

  • Page 33: Removal Of The Door

    Repair & Maintenance Removal of the door Removal of the fascia This hinges are screwed onto the housing and The operation panel can be loosened by remo- snapped in as well. Unscrew at first , then ving two screws, when the door is opened. The unlock the hinge and the door by pushing the electronics at the RM(D) 8xx1 and RM(D) 8xx5 is lock notch.

  • Page 34: Removal Of The Interior Light And Door Lock

    Repair & Maintenance Removing interior light and Find behind the plastic cover two screws hol- ding the locking hook. door lock In case of a defective lighting the whole unit (doorlock device) is to be changed. The transpa- rent cover is a separate part which does not belong to the unit.
  • Page 35 Repair & Maintenance The door lock tongue is fixed with two screws behind the cover plate. Fig. 55 The tongue can be adjusted if the door does not close correctly.

  • Page 36: Flowcharts

    Repair & Maintenance Flowcharts MES / AES Interior light does not work Interior light not pro- grammed? -> programm via service- mode Wiring not ok? -> check wiring (connector X111 or 114=door switch input; X109= light output); note polarity for LED light! LED light module MES / AES board defective?
  • Page 37 Repair & Maintenance MES / AES Gas mode does not work Wiring not ok? -> check wiring from main board to burner control (X110) Burner control P810 defective? -> check burner control with other AES or MES board; exchange P810 MES / AES board defective? ->...
  • Page 38 Repair & Maintenance AC mode does not work Wiring not ok? -> check wiring and connectors (supply X101; AC heater X102) AC Heating element defective? 5.1.1 -> check resistance of AC heater (approx. 350 Ohm) MES / AES board defective? ->...
  • Page 39 Repair & Maintenance AC mode does not work (although AC is connected) Wiring not ok? -> check wiring and connectors ( DC heater supply (X103/X104) AC Heating element defective? 5.1.2 -> check resistance of AC heater (approx. 350 Ohm) AES board defective? ->...
  • Page 40 Repair & Maintenance MES/ AES DC mode does not work Wiring not ok? -> check wiring and connectors ( DC heater supply (X103/X104) DC Heating element defective? 5.1. -> check resistance of DC heater (approx. 1-2 Ohm) MES / AES board defective? ->...
  • Page 41 Repair & Maintenance MES / AES Display is black; impossible to switch Wiring not ok? ->check wiring to X105 (DC supply) Fuse broken? ->check fuse Microprocessor hung ->Make a hardware reset by interrupting 12 VDC (use main DC switch in vehicle) Fridge older than 6.2.1...
  • Page 42 Repair & Maintenance MES / AES Relay buzzing in 12 V mode Reason: Wiring before Sept. 28, 2007 -> connect white cable and black cable of X105 to ground Reason: vehicle’s voltage not stable ->check terminals, fuse of vehicle defective Fridge does not switch to DC (auto) mode after the RV...

  • Page 43: Testplan Mes

    Repair & Maintenance Testplan MES Before testing make sure, that all cables are connected to the PCB ! Provide a possibility, that the 12 VDC supply , the AC supply , the +12 V heater supply and the D+/S+ connection (only on AES) can be interrupted easily ! The supply voltage must be between 11 VDC and 14 VDC.

  • Page 44: Testplan Aes

    Repair & Maintenance 5.10 Testplan AES Action Result Indication 230 VAC Function test Turn to AC mode with AC supply not Display shows "230" flashing with red connected Provide AC supply (230 V) Display shows "230" AC relay switches 12 VDC Function test Turn rotation knob to DC with +12 V Display shows "12"...
  • Page 45 Repair & Maintenance...

  • Page 46: Appendix

    ( in W) RM 8400 292 3430-51 / 2 30 mbar KZ 43 292 2033-06 / 9 RM 8401 241 2802-81 / 7 30 mbar KZ 43 292 2033-06 / 9 RM 8405 241 2802-81 / 7...
  • Page 47 Appendix Part no. Nominal thermal Part no. Model Gas pressure Jet ID number gas burner input ( in W ) RMS 8400 292 3430-51 / 2 30 mbar KZ 43 292 2033-06 / 9 RMS 8401 241 2802-81 / 7 30 mbar KZ 43 292 2033-06 / 9...

  • Page 48: Overview Software Changes

    Appendix Overview software changes 6.2.1 MES models (RM 8xx1) Change Marking introduced since Software name MES_Jun_27 green "geprüft"- Software: DC low voltage detection week 26 / 2007 sticker on hou- sequence changed (changes within 1 sing sec, if 12 V heater DC is available) MES_10_Sept white cross on Software: DC low voltage detection...
  • Page 49 Appendix 6.2.2 AES models (RM 8xx5) Change Marking introduced since Software name white circle on Software: DC low voltage detection AES_main_V1_40. since December 12, 2007 housing or stik- sequence changed (changes within 1 s19 (27 July 2007) ker on PCB sec, if 12 V heater DC is available) sticker on PCB AC low voltage detection revised...
  • Page 50 www.dometic.com...

This manual is also suitable for:

Rmsl 8500Rmsl 8501Rmd 8501Rmsl 8505Rmd 8505Rmd 8551 ... Show all

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