Service-Instruction COOL 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 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 T.B.
Table of contents 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 2.0 Description of model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Model identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.11 Testplan AES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.0 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 6.1 6.2 List of gas burners and jets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Overview software changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description of model 1.0 Description of model 1.1 1.2 Model identification Refrigerator rating plate The rating plate is to be found on the inside of the refrigerator. It contains all important details of the refrigerator. You can read off from this the model identification, the product number and the serial number. You will need these details whenever you contact the customer service centre or when ordering spare parts.
Description of model 1.3 Technical data RMS 8xxx RM 8xxx RML 8xxx RMD 8xxx H T B Fig. 2 Model Fig. 3 Dimensions Gross capacity H x W x D (mm) with without Depth incl. door freezer compartment Fig. 5 Fig. 4 Rating details mains/battery Consumption * electricity/gas over 24hrs Net weight Ignition Piezo Automat RMS 8400 821x486x568 80 / 8 lit. 85 lit. 125 W / 120 W ca.2,5 KWh / 270 g 25 kg RMS 8401 821x486x568 80 / 8 lit. 85 lit. 125 W / 120 W ca.
Description of model 1.4 Description of refrigerator 1 2 4 8 3 5 6 9 7 Fig.
Description of model Back side RM 8xxx 1 2 3 4 5 6 7 Fig.
Description of model Back side RMD 8xxx 8 4 7 1 5 6 2 3 Fig.
Description of model 1.5 Terminal block RM 8xxx Connections: A = Ground heating element DC B = Plus heating element DC C = Ground electronics D = Plus electronics geräteseitig D+ S+ – – + D+ = alternator signal S+ = AES-input-control signal (solar charge regulator) C D + A B fahrzeugseitig Fig. 9 RMD 8xxx on the appliance 1 2 1 B - A + on the vehicle Fig. 11 Fig.
Description of model 1.6 General Additional features RMD 8xxx Fridges of the 8-series with manual ignition are provided with a battery igniter and a GasOperation-Indicator (Galvanometer ). For using the locking button, the panel is formed asymmetric (recess on one side). I.e. changing the door rabbet is not possible any more. The rabbet has to be determined before the fridge is installed. The product number controls the side of the door rabbet.
Description of model 1.7 Explanation of operating controls Manual energy selection / manual ignition (RM 8xx0) battery igniter: 1 2 3 4 Fig. 13 Manual energy selection / automatic ignition (RM 8xx1) MES: 2 1 8 Mode 5 9 6 7 Fig. 14 Automatic energy selection / automatic ignition (RM 8xx5) AES: 1 2 8 Mode 5 9 6 7 Fig.
Components 2.0 Components 2.1 Power modules 2.1.1 Power module RM 8xx1 ( MES) X105 X114 X108 X110 X111 X109 X102 J4/J5 X101 J1/J2 Fuse* 1A / 250V Connection to display Fig. 17 X105 = 12 V Supply / - Wiring Recognition of heating element X114 = Reed switch or alt. electr. lock X108 = Temperature sensor (NTC) X110 = Connection burner control device (+/-, failure) X111 = alt. 2. electr.
Components 2.1.3 Power module RMD 8xx1 ( MES) X105 X115 X108 X110 X111 X109 X102 J4/J5 X101 J1/J2 Fuse* 1A / 250V Connection to display Fig.
Components 2.1.5 Operating principle 2.2 The electronics regulates the function of the components according to the selected energy, e.g. power supply for the heating elements. In addition the AES-power module ensures the operating with the optimal energy source according to the priority "230V AC - 12V DC - GAS". It also controlles the low voltage operation at 230V AC (no low voltage op. at 12V DC mode), and the "refuelling stop function" as well.
Components 2.4 Gas valve GV 100 2.5 Gas burner This component includes two gas valves in serial mounting (as part of gas safety device). voltage supply : per valve approx. 0,7V - 0,9V (switched on gas mode) 2 inductive resistance : per valve approx. 48-50 Ohm 3 1 Measuring points: voltage and resistance valve 1: Pin 1 – ground valve 2: Pin 2 – ground Fig 23 11 Ignition electrode 2= 2 Ionisation electrode 3= 3 Ground (connection to burner control device) GND Pin 1 Pin 2 2.5.
Components 2.6 Interior light and Door Lock Electrical door lock (option) 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. As an option an electrical door lock was available which locks the door automatically while the engine is running. With switched off engine the door is kept shut by a magnetic sealing, but not locked. Fig.
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) 1 in the door lock housing. Door closed = contact open Door open = contact closed 1 Fig. 28 Connection details LED-PCB Sensor LED + Fig.
Electrical connections 3.0 Wiring diagrams 3.1 RM 8xx0 / RMS 8xx0 Fig.
Electrical connections 3.2 RM 8xx1 / RMS 8xx1 Fig.
Electrical connections 3.3 RM 8xx5 / RMS 8xx5 Fig.
Electrical connections 3.4 RM 8xx5 with electrical door lock Fig.
Electrical connections 3.5 RML 8xx0 / RMSL 8xx0 Fig.
Electrical connections 3.6 RML 8xx1 / RMSL 8xx1 Fig.
Electrical connections 3.7 RMSL 8xx5 / RMD 8xx5 Fig.
Electrical connections 3.8 RMD 8xx1 Fig.
Electrical connections 3.9 RMD 8xx5 Fig.
Electrical connections 27
Troubleshooting 4.0 Troubleshooting 4.1 4.1.1 Information on failure display and trouble-shooting Refrigerators with an electronics system (MES, AES) indicate the occurence of a malfunction by the LED or display flashing. Status messages on the display 1 3 2 If a malfunction occurs, the indicator LED "Failure" (1) 1 flashes simultaneously. In the case of AES models an acoustic alarm sounds. Fig.
Troubleshooting 29
Repair & Maintenance 5.0 Repair & Maintenance 5.1 Entering the service mode RM 8xx1 and RM 8xx5 have an internal service mode which can be used for testing and adjusting the interior light or the electrical door lock. Step 7: Recognition sequence (Reed switch or electrical lock) Step 8: activates temperature LEDs (4) Step 9: activates lock and failure LED (2) + (5) To leave the diagnosis mode: Push button „2“ repeatedly or wait for 10 minutes.
Repair & Maintenance 5.
Repair & Maintenance 5.3 Sequence for recognizing „Heating element defect“ 5.5 Conditions: Interior temperature >18°C, corresponding relay is switched on (230V 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 and no door openings have happened (RMD). If the temperature difference a-b < 3 °K, the corresponding heating element error will be indicated. 5.
Repair & Maintenance 5.6 Removal of the door 5.7 Removal of the fascia This hinges are screwed onto the housing and snapped in as well. Unscrew at first , then unlock the hinge and the door by pushing the lock notch. The operation panel can be loosened by removing two screws, when the door is opened. The electronics at the RM(D) 8xx1 and RM(D) 8xx5 is screwed into the panel from the inside. Fig. 46 Fig.
Repair & Maintenance 5.8 Removing interior light and door lock Find behind the plastic cover two screws holding the locking hook. In case of a defective lighting the whole unit (doorlock device) is to be changed. The transparent cover is a separate part which does not belong to the unit. After removing the cover the housing can be unscrewed. Fig. 53 Fig. 50 Electrical doorlock (was an option) Proceed in the same way as above to remove electrical door lock device. Fig. 51 Fig. 54 Fig.
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.
Repair & Maintenance 5.8 Flowcharts MES / AES Interior light does not work Interior light not programmed? -> programm via servicemode 5.5 Wiring not ok? -> check wiring (connector X111 or 114=door switch input; X109= light output); note polarity for LED light! 2.1 MES / AES board defective? -> exchange main board LED light module defective? -> exchange light module 5.7 5.1 5.
Repair & Maintenance MES / AES Gas mode does not work Wiring not ok? -> check wiring from main board to burner control (X110) 2.3 Burner control P810 defective? -> check burner control with other AES or MES board; exchange P810 2.4 5.7 MES / AES board defective? -> exchange main board 2.
Repair & Maintenance MES AC mode does not work Wiring not ok? -> check wiring and connectors (supply X101; AC heater X102) 2.1 AC Heating element defective? -> check resistance of AC heater (approx. 350 Ohm) 5.1.1 5.7 MES / AES board defective? -> exchange main board 2.
Repair & Maintenance AES AC mode does not work (although AC is connected) Wiring not ok? -> check wiring and connectors ( DC heater supply (X103/X104) 2.1 AC Heating element defective? -> check resistance of AC heater (approx. 350 Ohm) 5.1.2 5.7 AES board defective? -> exchange main board 2.
Repair & Maintenance MES/ AES DC mode does not work Wiring not ok? -> check wiring and connectors ( DC heater supply (X103/X104) 2.1 DC Heating element defective? -> check resistance of DC heater (approx. 1-2 Ohm) 5.1. 5.7 MES / AES board defective? -> exchange main board 2.
Repair & Maintenance MES / AES Display is black; impossible to switch on Wiring not ok? ->check wiring to X105 (DC supply) 2.1 Fuse broken? ->check fuse 2.1 Microprocessor hung up? ->Make a hardware reset by interrupting 12 VDC (use main DC switch in vehicle) Fridge older than Oct.2007? ->exchange main board 6.2.1 6.2.
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 2.1 Reason: vehicle’s voltage not stable ->check terminals, fuse of vehicle defective Fridge does not switch to DC (auto) mode after the RV engine is started Reason: Softwarebug; Fridge older than Dec. 20, 2007 ->exchange main board 6.2.1 6.2.
Repair & Maintenance 5.9 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. No. Action Indication Result 1. 230 VAC Function test 1.1 Turn rotation knob to AC with AC supply not connected AC LED and red LED must flash 1.
Repair & Maintenance 5.10 Testplan AES No.
Repair & Maintenance 45
Appendix 6.0 Appendix 6.1 List of gas burners and jets Model Part no. gas burner Gas pressure Jet ID number Nominal thermal input ( in W) Part no.
Appendix Model Part no. gas burner Gas pressure Jet ID number Nominal thermal input ( in W ) Part no.
Appendix 6.2 Overview software changes 6.2.1 MES models (RM 8xx1) No. Change Software name Marking introduced since 1. MES_Jun_27 Software: DC low voltage detection sequence changed (changes within 1 sec, if 12 V heater DC is available) green "geprüft"sticker on housing week 26 / 2007 2. MES_10_Sept Software: DC low voltage detection reduced to 8.5 V. Sensitivity for ground difference increased to 1.3 V ; white ground cable linked with black ground cable (both of X105).
Appendix 6.2.2 AES models (RM 8xx5) No. Change Software name Marking 1. AES_main_V1_40. white circle on Software: DC low voltage detection sequence changed (changes within 1 s19 (27 July 2007) housing or stikker on PCB sec, if 12 V heater DC is available) 2. AC low voltage detection revised (Threshold 195 V) 3. V1.66.
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