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Rational iCombi Pro Troubleshooting Manual
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Rational iCombi Pro Troubleshooting Manual

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iCombi Pro
iCombi Classic
Troubleshooting

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Summary of Contents for Rational iCombi Pro

  • Page 1 Pro iCombi Classic Troubleshooting...
  • Page 2 2 / 64 80.51.321_ET_en-GB_V03...

  • Page 3: Troubleshooting

    Do not spray aerosols in the vicinity of this appliance while it is in operation. Service work may only be carried out by technicians that are trained by RATIONAL. When performing maintenance work, adhere to the relevant country-specific and local regulations and standards.
  • Page 4 Table of contents 1 Troubleshooting .................................... 3 2 ET_iCombi_10_V03.pdf .................................. 6 3 ET_iCombi_12_V03.pdf .................................. 7 4 ET_iCombi_20_V03.pdf .................................. 8 5 ET_iCombi_25_V03.pdf .................................. 9 6 ET_iCombi_28_V03.pdf ..................................  10 7 ET_iCombi_29_V03.pdf ..................................  11 8 ET_iCombi_32.1_V01.pdf................................ 12 9 ET_iCombi_32.2_V01.pdf................................ 13 10 ET_iCombi_32.3_V01.pdf................................ 15 11 ET_iCombi_32.4_V01.pdf................................
  • Page 5 35 ET_iCombi_Data_Loss_V01.pdf .............................. 51 36 ET_iCombi_Fuel_gas_analysis.pdf ...............................  52 37 ET_iCombi_Humidity_problem_uneven_cooking_result_V03.pdf .................. 53 38 ET_iCombi_Manual_humidity_calibration_V03.pdf ........................  54 39 ET_iCombi_Unit_does_not_heat_up_V03.pdf.........................  55 40 ET_iCombiClassic_Changing_CPU_pcb_A12_V03.pdf ...................... 57 41 ET_iCombiClassic_Starting_second_self_test_V03.pdf...................... 58 42 ET_iCombiPro_Changing_CPU_pcb_A11_V03.pdf ........................  59 43 ET_iCombiPro_Starting_second_self_test_V03.pdf .......................  60 80.51.321_ET_en-GB_V03 5 / 64...
  • Page 6 Error tree: Water level in the steam generator not dropping Service error: 10 Unit type: iCombi The water level in the steam generator does not drop during automatic pumping. Activate the functional test in the service level Start the SC-pump M4 Check short circuit of level electrode, Check the pump, pump hose and Combi water box for Pump active, water is pumped off...
  • Page 7 Art. 50.02.012 (5x solenoid valve block for iCombi Pro 20 1/1, 20 2/1 Art. 50.02.054 (5x solenoid valve block for iCombi Pro 6 1/1 - 10 2/1 Art. 50.02.102 (3x solenoid valve block + Care for iCombi Classic 6 1/1 - 10 2/1 Art.
  • Page 8 Error tree: Thermocouple is faulty Service error: 20 Unit type: iCombi Service error 20.1 Thermocouple cabinet B1 is faulty. Replace the sensor, reset maximum value Note: There is also a second B9 cooking chamber Cooking not possible B1 in diagnosis sensor for floor units, to which the Fault Tree also applies.
  • Page 9 Error tree: The water quantity during cleaning is insufficient Service error: 25 Unit type: iCombi Circulation pump does not perform or does not perform sufficiently (water loss during cleaning) or Water connection OK? Check water filter, pressure and hoses no power increase on the fan motor. Is the drain sieve in the cabinet clean? Clean the drain sieve Run the wastewater pump in the functional test for...
  • Page 10 Error tree: Thermocouples B5 or B1 are too hot Service error: 28 Unit type: iCombi Service error 28.1 Service error 28.2 Thermocouple B5 is over 170 °C Thermocouple B1 is over 350 °C The heating element steam is calcified or the steam generator is too hot Heating element in the cooking cabinet calcified or too hot.
  • Page 11 Error tree: Cooling circuit is not working properly, board temperature is over 80 °C Service error: 29 Unit type: iCombi Display service 29 Cooling circuit is not working properly, board temperature is over 80 °C Check the maximum temperature of the board in the diagnosis Maximum temperature over 80°C Check cooling fan Cooling fan runs when Cooking Mode is selected and the door is closed...
  • Page 12 Error tree: Gas combustion system Service error: 32.1 Unit type: iCombi Service error 32.1 Switch the unit to the gas type declared on the Does the connected gas type match what is indicated nameplate. on the nameplate? Note: Repeat flue gas check required! Error in the gas combustion system "Lockout error"...
  • Page 13 Error tree: Gas combustion system Service error: 32.2 Unit type: iCombi Service error 32.2 Switch the unit to the gas type declared on the Does the connected gas type match what is indicated nameplate. on the nameplate? Note: Repeat flue gas check required! Error in the gas combustion system "Lockout error"...
  • Page 14 Service error: 32.2 V01 · 05/2021 · RTS/Shof · de-DE...
  • Page 15 Error tree: Combustion unstable Service error: 32.3 Unit type: iCombi Service error 32.3 Switch the unit to the gas type declared on the Does the connected gas type match what is indicated nameplate. on the nameplate? Note: Repeat flue gas check required! Error in the gas combustion system "Lockout error"...
  • Page 16 Error tree: Gas blower speed Service error: 32.4 Unit type: iCombi Service error 32.4 Switch the unit to the gas type declared on the Does the connected gas type match what is indicated nameplate. on the nameplate? Note: Repeat flue gas check required! Error in the gas combustion system "Lockout error"...
  • Page 17 Error tree: Automatic ignition controller Service error: 33.1 Unit type: iCombi Service error 33.1 Switch the unit to the gas type declared on the Does the connected gas type match what is indicated nameplate. on the nameplate? Note: Repeat flue gas check required! Error in the gas combustion system "Blocking error"...
  • Page 18 Error tree: Automatic ignition controller Service error: 33.2 Unit type: iCombi Service error 32.2 Switch the unit to the gas type declared on the Does the connected gas type match what is indicated nameplate. on the nameplate? Note: Repeat flue gas check required! Error in the gas combustion system "Blocking error"...
  • Page 19 Error tree: Automatic ignition controller Service error: 33.3 Unit type: iCombi Service error 33.3 Switch the unit to the gas type declared on the Does the connected gas type match what is indicated nameplate. on the nameplate? Note: Repeat flue gas check required! Error in the gas combustion system "Blocking error"...
  • Page 20 Error tree: Automatic ignition controller Service error: 33.4 Unit type: iCombi Service error 33.4 Switch the unit to the gas type declared on the Does the connected gas type match what is indicated nameplate. on the nameplate? Note: Repeat flue gas check required! Error in the gas combustion system "Blocking error"...
  • Page 21 Error tree: Automatic ignition controller Service error: 33.5 Unit type: iCombi Service error 33.5 Switch the unit to the gas type declared on the Does the connected gas type match what is indicated nameplate. on the nameplate? Note: Repeat flue gas check required! Error in the gas combustion system "Blocking error"...
  • Page 22 Error tree: BUS Service error: 34.1 – 34.400 (BUS) Unit type: iCombi Bus fault index: Bus fault index: Bus fault index: 1: Motor above 2: Motor centre 4: Motor below 8: Pump board 16: I/O - power supply unit 32: Ignition box 64: HF power supply unit - 400: Complete failure Display Service 34.1 to 34.400...
  • Page 23 Error tree: Display Service 35.1 - 7 Service error: 35.1 - 7 Unit type: iCombi Display Service 35.1 - 7 Only possible for units with bus-controlled UltaVent Power supply exists at the UV Check voltage supply to UltraVent (UV). LED on the UV board flashes when the board is ok. Display Service 35, is E35 still present? Unplug the bus cable to the UV in the unit and plug it in again.
  • Page 24 Error tree: Moisture control via P1 incorrect Service error: 37 Unit type: iCombi Moisture control via P1 incorrect Set the unit to cold (40 °C) and the "steam" operating mode. Determine P1 value in diagnosis P1 sensor fault, replace (3017.1011) P1 value approx.
  • Page 25 Error tree: Care pump does not pump enough care solution into the steam generator Service error: 40 Unit type: iCombi Pro Display Service 40 Care pump does not pump enough care solution into the steam generator; (CDS sensor detects that the subsequent filling volume is too high due to Y1 up to the level electrode)
  • Page 26 Care pump does not pump enough care solution into the steam generator Service error: 41 Unit type: iCombi Pro / iCombi Classic Display Service 41 At the start of the cleaning process, humidification valve Y3 is automatically tested (CDS sensor), the first time it appears: Descale the nozzle, Service 41 if...
  • Page 27 Error tree: Filling solenoid valve Y1 does not open Service error: 42.1 Unit type: iCombi Service error 42.1 Check that the latest unit software is installed on the unit. In steam mode, combi cooking mode, cleaning or SC-automatic: The unit displays the notice "Steam generator fill quantity", followed by service error 42.1 No water flows in the Combi-water box.
  • Page 28 Disconnect the connector on the solenoid valve block and check the input voltage with a multimeter on the contact of the yellow cable. If Y1 is "On", the value measured between the contact (yellow Repeat the voltage Is the required value cable) measurement on the contact measured here (e.g.
  • Page 29 Error tree: Solenoid valve Y2 does not open Service error: 42.2 Unit type: iCombi Check that the latest unit software is installed on the Service error 42.2 unit. Note on the iCareSystem module test: Select service level (TECLEVEL) -> "CleanJet & Care" launcher - >...
  • Page 30 If Y2 is "On", Repeat the voltage 230 V must be measured between the contact (white measurement on the contact Is 230 V measured here? Replace the I/O board. cable) and neutral. X19 on the I/O board. Is this the case? Check the hose running from the solenoid Check the cable connection and valve control Y2 to the control solenoid for...
  • Page 31 Error tree: Steaming solenoid valve Y3 does not open Service error: 42.3 Unit type: iCombi Note on the iCareSystem module test: Check that the latest unit software is installed on the Select service level (TECLEVEL) -> "CleanJet & Care" Service error 42.3 unit.
  • Page 32 Disconnect the connector on the solenoid val ve block and check the input voltage with a multimeter on the contact of the grey cable. If Y3 is on "On", 230 V must be measured between the Repeat the voltage contact (grey cable) and neutral. measurement on the contact Is 230 V measured here? Replace the I/O board.
  • Page 33 Error tree: Care solenoid valve Y4 does not open Service error: 42.4 Unit type: iCombi Note on the iCareSystem module test: Check that the latest unit software is installed on the Select service level (TECLEVEL) -> "CleanJet & Service error 42.4 unit.
  • Page 34 Disconnect the connector on the solenoid valve block and check the input voltage with a multimeter on the contact of the black cable. If Y4 is on "On", 230 V must be measured between the contact (black Repeat the voltage measurement Replace the cable) and neutral.
  • Page 35 Error tree: Solenoid valve clima conditioning Y5/Y15 does not open Service error: 42.5 Unit type: iCombi Note on the iCareSystem module test: Select service level (TECLEVEL) -> "CleanJet & Care" Service error 42.5 launcher -> "Module test" tab -> "Module test iCareSystem".
  • Page 36 Is 12V measured Replace the solenoid valve when Y5/Y15 is triggered, e.g. in the event clima conditioning Y5/Y15. of steam? Check the connector contacts to ensure that all are in contact correctly. Problem solved? Replace the cable harness. Service error: 42.5...
  • Page 37 Error tree: CleanJet solenoid valve Y14 does not open Service error: 42.6 Unit type: iCombi Check that the latest unit software is installed on the Service error 42.6 Note on the iCareSystem module test: unit. Select service level (TECLEVEL) -> "CleanJet & Care" launcher ->...
  • Page 38 If Y14 is "On", Repeat the voltage 230 V must be measured between the measurement on the contact Is 230 V measured here? Replace the I/O board. contact (brown cable) and neutral. X19 on the I/O board. Is this the case? Check the cable connection and replace if necessary.
  • Page 39 Temperature increase is not detected Service error: 44 Unit type: iCombi Pro / iCombi Classic Display Service 44 When the steam generator is heating up at the start of a cleaning process, no temperature increase is detected by the cooking chamber sensor B1.
  • Page 40 Fehlerbaum: Service Error 72 – Error tree for eSTL Servicefehler: 72 Gerätetyp: iCombi Anzeige Service 72 Unplug the unit from the power supply while working on electrical compartment Run software update Problem solved? Be sure the unit and the steam generator have cooled down to room temperature (go to service level in basic settings) to get the initial status of the unit Check the power...
  • Page 41 A red LED (A or C) shows the error section (ST or HA and the error type. Count the green LED flashes and watch when a red LED (A or C flashes additionally). LED : steam generator LED C: Hot Air Sensor diconnected Sensor short circuit Out of logic range...
  • Page 42 Reconnect the wire harness plug to the eSTL in the correct way: Plugged in the wrong way: Plugged in the correct way: eSTL eSTL wire harness plug Check the position of the wire harnesses plug on eSTL. Is the position correct? Incorrect sSTL plug position Correct sSTL plug position eSTL...
  • Page 43 Switch ON the unit Problem solved? Switch OFF the unit Disconnect the sensor from the wire harness Disconnect the sensor (PT1000) and meassure the resistance of both sensors (red-red + white-white). Note: Every temperature sensor PT1000 (steam or hot air) has two resistances inside. Are the resistances of both sensors different Change the temperature sensor PT1000...
  • Page 44 Switch ON the unit Problem solved? Switch OFF the unit Change the eSTL RESET eSTL Servicefehler: 72...
  • Page 45 Error tree: Unit has lost the calibration Service error: 90 Unit type: iCombi Classic Display Service 90 Unit has lost calibration. Is mainly shown when commissioning the unit. Was the self test carried out when commissioning the unit? Activate under "General settings" - "Self test". Switch off the unit Switch on the unit Self test is started automatically...
  • Page 46 Error tree: SC pump malfunction while Care chemical is in the steam generator. Service error: 110 Unit type: iCombi Pro / Classic Display Service 110 SC pump malfunction while Care chemical is in the steam generator. Water tap open. Water tap OK?
  • Page 47 Error tree: Level electrode S2 detects no resistance Service error: 120 Unit type: iCombi Display Service 120 After filling the Care chemical and control Y1, the level electrode S2 does not recognise any water level. Result: Steam generator cannot be rinsed! Chemical residues remain in the steam generator.
  • Page 48 Unit type: iCombi Note: Any change in the gas type of the unit must be reported to RATIONAL. To do this, please install the TechAssistant app. The gas type already set may only be changed by technicians who have participated in RATIONAL gas training.
  • Page 49 Carry out flue gas analysis in the functional test. All target values ​ ​ a re displayed in the individual steps. Follow the instructions: Flue gas analysis Please inform RATIONAL of the change carried out and make sure the new gas type sticker is placed on the unit to confirm a change has been made.
  • Page 50 Error tree: Functional test P1 Service error: - Unit type: iCombi Basic requirements: The temperature sensor cooking cabinet B1 (<40 °C), thermocouple control valve B2 (<65 °C) and thermocoup le humidity B4 (<40°) It is recommended that the steam generator is rinsed to enable sufficient cooling of the components. The following table shows examples of different unit types: 600m above sea level.
  • Page 51 Is the error resolved? Go to the service level of the unit and carry out the motor positioning in the launcher (iCombi Pro) "hot air" or under "Drive Positioning" (iCombi Classic). Replace the PCB control computer and the micro SD card or EEPROM.
  • Page 52 Repeat steps A and B for hot air blowers above and below. CO in hot air must not exceed 150 ppm. Please inform Rational of the change carried out Service error: - V03 · 04/2021 · RTS/Awei · en-GB...
  • Page 53 Error tree: Non-uniform cooking result, moisture problems Service error: - Unit type: iCombi A non-uniform cooking result can result from various causes: Application errors, including: Cooking chamber is not pre-heated Incorrect accessories The raw product is not the same size, quality or starting temperature Technical reasons, including: Insufficient dehumidification Solenoid valve clima conditioning Y5 is not working properly...
  • Page 54 Switch on the unit In the bottom right corner of the screen, select the symbol with the 3 Under Basic Settings: Select the RATIONAL service level dashes by pressing the button on the right of the screen with your finger.
  • Page 55 Error tree: Unit does not heat up Service error: - Unit type: iCombi The unit is running, but steam and hot air are not working. Check if the unit is configured in Show mode Switch off Show mode Check if the door sensor S3 shows "1" when the door is closed S3 could be damaged or incorrectly installed Open the left side panel of the unit and check if the eSTL...
  • Page 56 Electric and gas systems are in operation, Steam generation OK, but hot air does not work. Check the Checking the error history value of the 55-56-57 blink code The motor is possibly faulty. Check ignition box Test Motor in FT Testing the firing order * Possible damage of the ignition box * Gas blower motor...
  • Page 57 Error tree: Replace CPU board (A12) Service error: - Unit type: iCombi Classic All unit-specific data is on the board as well as on the EEPROM. The operator's manual is only on the board and the HACCP data is available on both the EEPROM card and the board.
  • Page 58 Error tree: Implementation of second self test Service error: - Unit type: iCombi Classic Basic requirements: The cooking cabinet sensor B1 (<40°C). Control After changing the circuit board, a self-test must be carried out. temperature sensor B2 (<65 °C) and climate sensor B4 (<40°) For Gas units: After the self-test has been carried out, a flue gas analysis adequate cooling of the components, it is recommended that the must be carried out.
  • Page 59 Dismantle the old CPU board iCombi Pro (A11); Remove the SD card for use with the new board Install the new CPU board iCombi Pro (A11) 42.00.251 Insert the SD card into the new board. Reconnect the unit to the power supply and switch it on again. Wait until the verification mark appears and confirm with the green tick.
  • Page 60 Error tree: Implementation of second self test Service error: - Unit type: iCombi Pro A second self-test is only necessary if the unit is installed in a new location that is more than 300 m higher or lower than the first. The calibration is included in the self-test and therefore described in more detail here.

This manual is also suitable for:

Icombi classic