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Electrolux Professional SKCH 30 Service Manual

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SERVICE MANUAL
BLAST CHILLER FREEZER RANGE 30 50 70
2020
Doc. N. 595R36300 Edition 1.0.6 – 02/2020

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Summary of Contents for Electrolux Professional SKCH 30

  • Page 1 SERVICE MANUAL BLAST CHILLER FREEZER RANGE 30 50 70 2020 Doc. N. 595R36300 Edition 1.0.6 – 02/2020...
  • Page 2 Document made by Product Care – Technical Training & Service – Vallenoncello PN/Italy All the images and information of this document are property of ©Electrolux Professional Spa. This document and all of its contents cannot be copied or used, in part or entirely without the written authorization of Electrolux Pro- fessional Spa.
  • Page 3 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 REVISIONS UPDATE: EDITION DESCRIPTION DATE 1.0.0 First publication FEBRUARY. 2019 1.0.1 Modification pag 3.12.13.14 JUNE 2019 1.0.2 Modification pag 12.26.35.40.63.65.71.101.121 JULY 2019 1.0.3 Modification pag 17.38.63.109.110.111.132.133.134 JULY 2019 1.0.4 Modification pag 4.19.22.23.68.81 SEPTEMBER 2019 1.0.5...
  • Page 4 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 MODELS COVERED BY THE SERVICE MANUAL This manual is relative to the following list of appliances. 30 KG 50 KG 70 KG 30 KG 50 KG 70 KG MODEL TYPE BUILT IN...
  • Page 5 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 INDEX 1. GENERAL INFORMATION ...................10 1.1 GENERAL INFORMATION ........................10 1.2 SAFETY INFORMATION/PRECAUTIONS .................... 11 1.3 PERSONAL PROTECTION EQUIPMENT .................... 12 1.4 GENERAL SAFETY INFORMATION ..................... 13 1.4.1 Residual Risks ..........................13 1.5 SAFETY SIGNS TO BE PLACED NEAR THE MACHINE AREA ............
  • Page 6 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.6.9 Expansion Valve ..........................34 2.6.10 Setting the Expansion valve ......................34 2.6.11 Correct position of the thermostatic sensor ................... 34 2.6.12 Identification of the thermostatic valve ..................35 2.6.13 Charge MOP ..........................36 2.6.14 Quantity of refrigerant to charge ....................
  • Page 7 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.8.9.6 Service ambiente explanation ....................62 2.9 WIZARD ..............................69 2.9.1 Installation wizard check ........................69 2.9.2 Manual Test Wizard ......................... 77 2.9.2.1 Start manual wizard ......................77 3. USE OF APPLIANCE ....................80 3.1 OPERATING INSTRUCTIONS ......................
  • Page 8 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 4.3.19.2 Electrical Connections Food Probes .................. 98 4.3.20 Heater Evaporator ......................... 99 4.3.20.1 Functionality ........................99 4.3.20.2 Electrical Connections Evaporator Heater ................. 99 4.3.21 Test Digital I/O: Step By Step Digital Operable Components Testing ........100 4.3.22 Identify rapid“test cycles and components”...
  • Page 9 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.2.2 Rack supports ........................134 6.3.2.3 Cell probe (blue) ......................... 135 6.3.2.4 Evaporator probe (grey) ..................... 136 6.3.2.5 Food probe ......................... 137 6.3.2.6 Condenser probe (black) ....................138 6.3.2.7 Out evaporator probe (green) .................... 138 6.3.2.8 Thermostat .........................

  • Page 10: General Information

    SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 1. GENERAL INFORMATION To ensure safe use of the machine and a proper understanding of the manual it is necessary to be familiar with the terms and typographical conventions used in the documentation. The following symbols are used in...
  • Page 11 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 • Risks mainly of a mechanical, thermal and electrical nature exist in the machine. Where possible the risks have been neutralised: – directly, by means of adequate design solutions. – indirectly by using guards, protection and safety devices.
  • Page 12 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Summary table of the Personal Protection Equipment (PPE) to be used during the various stages of the ma- chine's service life.X Protective Stage Gloves Glasses Safety Safety garments footwear helmet Transport ●...

  • Page 13: Residual Risk

    SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 The machines are provided with electric and/or mechanical safety devices for protecting workers and the machine itself. Therefore, the user must not remove or tamper with such devices. The Manufacturer declines any liability for damage due to tampering or their non-use.
  • Page 14 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Mechanical safety characteristics, hazards The appliance does not have sharp edges or protruding parts. The guards for the moving and live parts are fixed to the cabinet with screws, to prevent accidental access.
  • Page 15 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Prohibition Meaning Do not remove the safety devices Do not use water to extinguish fires (placed on electrical parts) Keep the area around the appliance clear and free from combus- tible materials. Do not keep flammable materials in the vicinity of...
  • Page 16 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 The main identification sticker is located bottom left side and under condenser panel. QR-Code sticker on control panel upper side (visible when opening the door) The meaning of the various information is listed below: The meaning of the various information is listed below.
  • Page 17 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 1.6.1 Serial Number (Production Date) The serial is necessary to find the correct spare part or to ask tech. support. EXAMPLE: Serial Number 8 01 1 0001 YEAR WEEK 0001 APPLIANCE...
  • Page 18 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Please, for technical data and overall drawings refer to Installation Manual available on website www.electro- lux.com/professional. Table reference of dimensional units Max High Width Deep Min High Models (adj.level) Whit door open Weight KG (adj.level)mm...
  • Page 19 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Please, for overall certifications refer to Conformity Certificate and Conformity Declaration available on website www.electrolux.com/professional. 1.9.1 Blast chiller /freezer 50 kg 10 gn 1/1 and 70 kg 10 gn 2/1 DOC NUMBER 595R36300...
  • Page 20 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 1.9.2 Electrical schema interactions 50_70 kg Europa DOC NUMBER 595R36300...
  • Page 21 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 1.9.3 Electrical schema interactions 50_70 kg USA DOC NUMBER 595R36300...
  • Page 22 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 1.9.4 Blast chiller /freezer 30kg 6 gn 1/1 DOC NUMBER 595R36300...
  • Page 23 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 1.9.5 Electrical schema interactions 30 kg Europa DOC NUMBER 595R36300...
  • Page 24 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 1.9.6 Electrical schema interactions 30 kg USA DOC NUMBER 595R36300...
  • Page 25 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 COMPONENTS DEFINITION EXPLANATION Cavity fan probe Probe Set the On Off cavity Fans Cavity probe Probe Set the temperature of cavity Compressor Pump Suction and discharge the refrigerant gas Condenser Heat exchanger Reduce the temperature.

  • Page 26: Installation And Commissioning

    SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2. INSTALLATION AND COMMISSIONING Refer to IN (Installation manual) code 595R361”” Refer to the installation drawing for information about supply power connection and general clearances of the unit sides from walls and ceiling.
  • Page 27 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 1. Casters: models with built-in cooling unit (no remote configuration). 2. Plinth: guarantee free access to the unit rear side. 3. Marine feet: guarantee free access to the unit rear side.

  • Page 28: Basic Installation - Overview

    SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.6.1 Technical Instructions / Installation Precautions The instructions below are general guidelines, but they do contain the major points that shall be taken into ac- count for proper and safe product installation for assuring best performances and preventing warranty voidance.

  • Page 29: Installation Steps

    SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.6.4 Installation Steps INFORMATION: Select and size the equipment needed to assemble the refrigeration system according to the project specifications (pipes, valves, accessories, condensing unit). Carefully observe the scope for each model.

  • Page 30: System Evacuation

    SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 After the installation is finished, pressurize the system using nitrogen and/or a small refrigerant charge up to • 100 psig (equivalent to 7,8 bar); never use pressures higher than 150 psig (equivalent to 11.35 bar) for pre- venting the low-pressure switch damage.
  • Page 31 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Wait for 15 minutes before switching on the system again, to allow the gas to be evenly distributed and balance the pressure levels. The fine-tuning of the refrigerant charge must be done while the system is running (compressor switched on), by observing the sight glass.

  • Page 32: Filter-Dryer

    SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.6.8 Basic Accessories of a Cooling System Filter-Dryer Installed at the liquid line, its function is to retain particles and mainly remove residual humidity from the system. Sight Glass It is installed at the liquid line, just after the filter -dryer and used to monitor the system refrigerant charge.

  • Page 33: Schrader Valve

    SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Schrader Valve Used for service operation (Refrigerant Charge). Suction Filter It is recommended to clean the systems if the compressor has burned out. In- stalled at the suction line, its main task is to retain the contaminants (result of the burning of the compressor), and to retain system particles.

  • Page 34: Expansion Valve

    SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.6.9 Expansion Valve It is installed at the liquid line, before the evaporator. Its function is to keep the pressure different between the condenser and the evaporator; it also adjusts the refrig- erant flow within the evaporator.
  • Page 35 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 The position depends on the external diameter of the tube. When the suction pipe has an outside diameter of 16 mm or less, it can be secured both in the positions (see Figure7): a.
  • Page 36 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.6.13 Charge MOP All MOP valves have a very small charge in the sensor. This means that the valve or the element should be placed in the hottest position of the sensor otherwise a charge migration may occur from the sensor to the element and the expansion valve will stop working.

  • Page 37: Electrical Connection

    SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.6.15 Electrical connection Use the separate power supply from remote unit and bcf. For the power supply dimensioning, check the electric wiring diagram of the appliance: after retrieving current absorption and power data relevant to the live lines, determine the cables sections able to support the ab-sorbed current.
  • Page 38 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.6.15.2 Electrical box in the BCF: IE. Of clamp connections Warning: Remember use DIFFERENT power supplies for energizing the BCF and the remote unit. DOC NUMBER 595R36300...
  • Page 39 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 See reference instructions provided with the INSTALLATION MANUAL. Warning: assemble the guides for the condensing tray only after positioning the unit in its final location – Risk of damaging the guides if moving the unit with fork-lift when the guides are in place.
  • Page 40 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.8.1 Power connection on bcf 380/400V The units built-in are already predisposed with power cable, usually without plug. The reference to the adsorbed current and the voltage are on the unit data plate.
  • Page 41 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.8.3 Description Main Display Main display Touch Start button screen Button ON OFF button Utility drawers Multiphase drawer USB key in/out Other connection aux Main menu drawer Cycle selection buttons Open able flap...
  • Page 42 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.8.3.1 Icon description, Message of Dialogues 0℃ Temperature set Move between the pages Soft/ Soft chill cycle Move between the pages or in- Hard Hard chill cycle crease/decrease a value Skip phase...
  • Page 43 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Confirm and save the selection Guidelines Discard the selection or close a pop- Multicycles Come back to the previous menu Save program Clear all phases Save all pre-sets Delete the pre-set...
  • Page 44 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.8.4 Softwar update The software for each PNC is available for authorized technicians on the web sites (PRIDE-SERVICE POR- TAL- AGELUX etc..) and can be downloaded in a zip file. For those that do not have access to the web sites, refer to your local country customer care.
  • Page 45 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.8.5 Programming file The Programming file (that from now on we will call P.F as abbreviation) is the software application of the bcf and this is stored in the U.I. The P.F. will update the...

  • Page 46: Programming Parameters

    SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 NOTE: - in case of power loss during installation, in case of extraction of the USB Key during installation or other ma- neuver error, don't worry; The update process can be restarted again without damaging the appliance.
  • Page 47 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.8.7 Pnc & ser upload (pncserial.json) This is also the procedure to upload into a replaced spare part the PNC-SER § OVEN IDENTITY CARD that is needed fot SKY DUO/CONNECTIVITY. In case that we have to replace an user board (U.I) it will be necessary to upload into the new board the Program- ming file, Programming Parameters files (refer to previous chapters) and also upload the PNC &...
  • Page 48 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Double click to unzip and locally save the “pncSerial.jason” into your USB key in the root. It is preferable to have the following USB type: USB TYPE 2.0 8Gb or 16Gb FAT 32 FORMATTED.
  • Page 49 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 pncSerial.json just saved onto your USB key with “notepad”; you should see an empty Open the file like this: 9PDD = oven 9VTX = Refrigeration Insert into the notepad file your data of PNC and SER that you can read on the UNIT identification sticker data plate, be carefull to respect all characters and the five spaces as indicated in the description.
  • Page 50 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Once that the data has been inserted correctly save the file with the “.JSON ” extension back to the USB Key “JSON” extension GOOD 2.8.7.2 How to install update pnc & ser (pncserial.json): With the oven turned on, insert your USB Key into the main port, enter into the §...
  • Page 51 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Crosscheck that the PNC and SER have been written into the identity card by enetering into the § SETTINGS accessible in the main screen view by pressing the menu drop down menu. The access of this area does not require a password.

  • Page 52: Usb Data Transfer

    SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.8.8 Usb data transfer The Transfer ambient is used to manage data transfer between UI and a USB key. It contains four functionalities: Download all: Used to copy all data (parameters, recipes,…) from UI to USB key;...
  • Page 53 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 What follows is a description for each of the pages: 2.8.8.3 Select types In the download all and upload all functionalities, the user can choose which data to include in the download or upload operation: In case of an upload operation, only the types present on the USB key will be present in the list.
  • Page 54 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.8.8.5 Select file It is present for all of the upload functionalities. The user can select a file for upload operation. On the bottom of the file name there is the file path displayed, unit excluded.
  • Page 55 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.8.8.7 Enter file name Enter a name for the file being created. 2.8.8.8 Select Items In the download selected and upload selected functionalities, it is used to select which items to copy from/to the USB key.
  • Page 56 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.8.8.9 Confirm A confirmation popup used to acknowledge a file overwrite on USB key or on the UI (symbols and texts differ for different operations). 2.8.8.10 Replace or add items In the upload selected functionality, it is used to specify if the items selected have to replace the existing items or they should be added.
  • Page 57 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.8.8.11 Skip, Duplicate, Add When the user is importing items from USB, this page is displayed if there are items with the same name on the UI. For each of the items, the user can choose to keep the existing item (skip), to replace it with the new one (Replace) or to duplicate it (Duplicate).
  • Page 58 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.8.8.13 Types list for service: Type Selectable “Replace” and “Add” Only download File extension download/upload available in “upload selected selected” ✓ ✓ .prg.json Programs ✓ ✓ .apres.json Automatic presets Parameters .par.json ✓...
  • Page 59 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 The popup shown in the example above is an example for errors and warnings related to USB management. The simble above will be a yellow triangle for warnings and a red cross for errors. The icons used will be the same of the “diagnostics”...
  • Page 60 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.8.9 How to acess to service area Service Area INFORMATION: Could be necessary to enter in the service area to digit a PASWORD that can guarantee to only specialized personnel access to this environment where can modify the actual setting.
  • Page 61 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.8.9.1 How to show the “data monitor” Enter in the service area as show the chapter 2.8.9 • Back to the main menu window • Select in the sub menu “data monitor”...
  • Page 62 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.8.9.6 Service ambiente explanation 2.8.9.6.1 Enviroment Select deselect the ambient showed in the main menu 2.8.9.6.2 Alarms log Show the history alarm DOC NUMBER 595R36300...
  • Page 63 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.8.9.6.3 Technical service ID Identification area of thecnical service and phone number 2.8.9.6.4 Appliance parameters • Identification of parameter and value to set or change. • Reset the default parameter setting...
  • Page 64 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.8.9.6.5 Counters Here it is possible check the time and cycle used in the units, as: • How many cycle used • How many hours used • Reset the counter DOC NUMBER 595R36300...
  • Page 65 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.8.9.6.6 Test digital I/O Check of the functioning for each component (ON – OFF) DOC NUMBER 595R36300...
  • Page 66 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.8.9.6.7 Restore Automatic mode Cancel and restore the original automatic cycle factory preset. (Once selected all user presets will be lost) 2.8.9.6.8 Clear Program mode Cancel all program and categories set from user.(Once confirmed all information will be lost)
  • Page 67 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.8.9.6.9 Clear MultiTimer data Cancel all MultiTimer data 2.8.9.6.10 Clear HACCP log Cancel all HACCP log DOC NUMBER 595R36300...
  • Page 68 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.8.9.6.11 Manage passwords Reset the password of user in case it is lost or forgotten DOC NUMBER 595R36300...
  • Page 69 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.9.1 Installation wizard check Automatic test of the unit , with relative setting of date and time and check all components and probes If the wizard is enabled, from parameter LAIP, at first switch on of the unit the wizard will On .
  • Page 70 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Start Second step “Installation Select the Mesurement and Control fan rotation, Amp_Volt checks and setting” view and confirm and confirm confirm Control the leveling of the unit and If the unit is connected to a water-...
  • Page 71 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Install the condenser water tray and discharge Start Third step view “Automatic Test” and confirm water condensation pipe (if necessary where present), and confirm A compressor test will be activated for a specified time, if interrupted, with the stop button, it will remain inactive until the time that appears on the screen expires.
  • Page 72 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Test condenser fan 1. The con- Test liquid valve: The solenoid Test Door Heater: The frame door denser fan in same direction of the valve will be active. “ if present heater will be active;...
  • Page 73 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Heating Unit Test: The hot cycle phase testing, it is necessary to check The digital test of the mechanical components has been done. Press proper cycle operation; Press the button and the cycle start.
  • Page 74 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 When the temperature of the “Prep- The temperature that must be A countdown time limit will be acti- aration phase” is reached, the reached at this stage is 40°C, vated, which will determine the ef- “Testing phase”...
  • Page 75 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 The “Preparation phase” will end In the dashboard “Status” is indi- The screenshot below shows the cated the first Step “Preparing only when the temperature set in actual temperature of the cavity phase”...
  • Page 76 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 The screenshot below shows the If the all configuration test are con- In case some test is not performed, correct phase concluded. cluded with positive result, confirm or interrupted, or you want to re-...
  • Page 77 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 2.9.2 Manual Test Wizard This is a procedure that the service can use in case automatic wizard is not enabled and where service technician can approach the unit using some cycle and environment to test all mechanical parts and refrigerant circuit to ensure that the unit function well.
  • Page 78 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 T° Cavity T° Evaporator Food probe PWM =30 Warning: The values of these sensors must be more allied to the temperature present in the cavity 11. Check in data monitor the value of temperature as T°condenser...
  • Page 79 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Solenoid valve active (IN USA MODEL ONLY ONE OF TWO IS ACTIVE N1 IS WORK N2 IS ONLY IN START OVER -10°C (14F)) Door frame active 17. The temperature set in this cycle will arrive to set before the countdown set in the time. In case it reaches before Stop the cycle and Start a manual defrost ( door open is better) The Heaters are always ON 18.

  • Page 80: Use Of Appliance

    SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 3. USE OF APPLIANCE Please refer to the Installation and Operating Manual of the appliance; the document is available for authorized technicians on the web sites (PRIDE-SERVICE PORTAL- AGELUX etc..) In case of any doubt, refer to your local country customer care.
  • Page 81 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 4. DETAILED APPLIANCE AND COMPONENTS DESCRIPTION/FUNCTIONING 4.1.1 Functionality DOC NUMBER 595R36300...
  • Page 82 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 4.2.1 Functionality touch panel The UI of the touchscreen appliances is supplied from the ACU(petra) connector j2 into contact J7. If the user interface (user board) cannot comunicate with any other board for more than a determinated time (ex 15") any running cycle will be stopped.
  • Page 83 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 4.2.2 PMH power supply 100-240 Vac to 12V dc General Information: The power supply has input from 85Vac to 264Vac with nominal output voltage of 12V. The highly efficient convection cooling construction can operate from -30°C to 70°C...

  • Page 84: Compressor Identification

    SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 4.3.1 Over view The compressor consists of a framework hosting the electric engine inside and the mechanical part of the com- pression piston. The engine, which is suitably connected to the power supply, triggers the crank gear hence moving the pistons to the bottom of the cylinder and activating the suction.

  • Page 85: Pipes Connections

    SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 4.3.6 Pipes Connections Before starting the installation of the compressor, discharge the pressure of pre-charge by acting on both service valves. Warning: Do not remove any component from the compressor before having executed this operation.

  • Page 86: Electrical Connections

    SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 4.3.7 Table of pipe connection of Dorin compressor The table shows the standard indications regarding pipe connections (Dorin compressor) Range Model Range Model Suction Discharge Suction Discharge charge weight charge weight...

  • Page 87: Protection System

    SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Warning: For the dimensions of the contactors, cables and protection devices (fuses, circuit breakers) of the electrical power refer to the values of maximum working (FLA) and start-up current (LRA) shown on the unit data plate 4.3.9 Protection System...

  • Page 88: Compressor Disassembly

    SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Warning: POE and PAG oils are strongly hygroscopic. Moisture binds itself chemically to the oil molecule. Carefully operate while replacing the oil. Prevent the air from entering the circuit. In case of refrigerant gas leak, aerate the room where the leak occurred before any operations. Do not stay in the machinery room if it has not been properly aerated;...

  • Page 89: Rotalock Valves

    SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 4.3.14 Rotalock Valves UJ VALVES Process and manometer Connection to compressor or receiver Main connection Pressostat port DOC NUMBER 595R36300...
  • Page 90 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 4.3.15 Crankcase heater installations It is recommended to fit an oil heater in the compressor crankcase, because, if the compressor is stopped, there is the possible storage of refrigerant inside the crankcase. The heater reduce the dilution of liquid refrigerant with the oil.
  • Page 91 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 4.3.16 Electrical Connection Of The Compressor On The Unit DOC NUMBER 595R36300...

  • Page 92: Evaporator Fan

    SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 4.3.17 Evaporator Fan 4.3.17.1 Functionality fan Cable COLOR Position/label wire Label cable Voltage 200-240V Black Con10/L 50-60 Blue Con 11/L PWR UP/DOWN Speed 1475/1500 Yellow/Green Con 12/PE P Couns. 165W Blue 1.35...
  • Page 93 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 4.3.17.2 Electrical Connections Fan DOC NUMBER 595R36300...
  • Page 94 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 4.3.18 Probe’s 4.3.18.1 Probe’s feature Every cable has printed the name of component ( cell/evap/outevap) 4.3.18.2 Electrical Connections Probes DOC NUMBER 595R36300...

  • Page 95: Food Probe

    SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 4.3.18.3 Probe functions Descriptions Colours Where are positioned Functionality Cavity probe Blue Inside of the cavity on upper Control logic the cavity temperature Evaporator probe Grey Inside of evaporator Control logic the defrost limit temperature...
  • Page 96 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 4.3.19.1.2 Kit 3 Food Probe With One Sensor 4.3.19.1.3 Kit One Food Probe With3 Sensors DOC NUMBER 595R36300...
  • Page 97 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 4.3.19.1.4 Kit One Probe With Six Sensor DOC NUMBER 595R36300...
  • Page 98 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 4.3.19.2 Electrical Connections Food Probes Wiring cable present on connector: Color Yellow sensor n°1 Color White sensor n°2 Color Brown sensor n°3 Color green and black GND Two connectors for 6 sensors...
  • Page 99 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 4.3.20 Heater Evaporator 4.3.20.1 Functionality Located in the evaporator they work following different cycle: Higine ( defrost etc) Hot lite cycle Tension V Nominal power W Quantity 800 +5% - 10% 3.47...
  • Page 100 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 4.3.21 Test Digital I/O: Step By Step Digital Operable Components Testing for automatich test digital refer to paragraph 2.10.3.6 4.3.22 Identify rapid“test cycles and components” • Acess to service area refer to paragraph 2.3.3 •...
  • Page 101 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Back to data monitor checking the value of probes and the components active , as • 1. Heater 1= active 2. Heater 2= active 3. T° Evaporator 4. T° Cavity 5. T° Probe Also in this case the values of probes change following the temperature.

  • Page 102: Troubleshooting

    SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 5. TROUBLESHOOTING Service Action Type of Possible Anomaly (phase# refers to Description Instructions to User anomaly causes Service Manual) In case of cycles based on food Give information about Food probe...
  • Page 103 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Service Action Type of Possible Anomaly (phase# refers to Description Instructions to User anomaly causes Service Manual) The cavity temperature is be- low the holding cycle temp -Enter in the service area check the set of...
  • Page 104 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Service Action Type of Possible Anomaly (phase# refers to Description Instructions to User anomaly causes Service Manual) Check if the food probe are well con- Cycle on going: the cycle nected...
  • Page 105 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Service Action Type of Anomaly Possible causes (phase# refers to Description Instructions to User anomaly Service Manual) Cycle on going: the cycle goes on in probe mode if Check if the food probe are well con-...
  • Page 106 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Anomaly Service Action Possible causes (phase# refers to Type of anom- Description Instructions to User Service Manual) Level the unit with the adjusta- ble feet Check the screws of feet are fixed...
  • Page 107 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Anomaly Service Action Instructions (phase# refers to Type of anom- Description Possible causes to User Service Manual) Defective pressure switches Repair or replace The compressor oscillates continu- Refrigerant load and discharge pres-...

  • Page 108: Servicing The Appliance

    Blast Chiller Freezer SKCH 30 50 70 6. SERVICING THE APPLIANCE List of needed tools Please, refer to the Electrolux Professional Universal Spare Parts Catalogue [usp].. 6.1.1 Ordinary Tools The following tools take part of the Kit of assorted tools [usp #0S1288] contained in the Tool trolley case [usp #0S1980] 6.1.2 Special Tools: List, Description And Spare Part Code Per Each Special Tool...
  • Page 109 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 ATTENTION! When performing the procedures to replace the components of the cooling circuit, pay attention to some im- portant precautions, so as to avoid the contamination of the refrigeration systems. 6.2.1 Storage of components...
  • Page 110 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.1 Disassembly/Reassemble Of Components Range 50_70 Kg 6.3.1.1 Accessing the components on the back side of the appliance Ensure enough space around the appliance when operating on the back side. 1. Unscrew the four screw of the back spacer to remove it (Fig. 1).
  • Page 111 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 • • • 6.3.1.3 Cell probe (blue) The cell probe is located inside the chamber, fixed on the fan protection grid. 1. Follow the procedure in paragraph [Rack support ], sequence 1 and 5.
  • Page 112 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 • • .3 … • 6.3.1.4 Evaporator probe (grey) 1. Follow the procedure in paragraph [rack support and cell probe 1 to 2] . 2. Open the evaporator conveyor, find the evaporator probe and pull out carefully the sensor from its position (Fig.
  • Page 113 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 • DOC NUMBER 595R36300...
  • Page 114 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.1.5 Food probe 1. Follow the procedure in paragraph [rack support and cell probe 1 to 2]. 2. Open the evaporator conveyor and unscrew the two screws shown in figure 1 to remove the wiring cover.
  • Page 115 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.1.6 Condenser probe (black) 1. Follow the procedure in paragraph [Accessing the components on the back side of the appliance] to reach the connector of the condenser probe and disconnect it.
  • Page 116 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.1.8 Thermostat 1. Follow the procedure in paragraph [rack support and cell probe 1 to 2]. 2. Open the evaporator conveyor and unscrew the nut shown in figure 1 to release the thermostats.
  • Page 117 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 9. Reassemble all the removed components following the inverse procedure. • DOC NUMBER 595R36300...
  • Page 118 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.1.10 Heating element 1. Follow the procedure in paragraph [rack support and cell probe 1 to 2], sequence 2. Disconnect the connector from clixson to heating element. 3. Follow the procedure in paragraph [Accessing the components on the back side of the appliance] to reach the connectors of the heating element to be replaced and disconnect them.
  • Page 119 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.1.12 Control Panel 1. Follow the procedure in paragraph [Comand Panel], to remove the Comand Panel. 2. Unscrew the four screws shown in figure 1 to disassemble the control panel (2 screws on top, one on left side, one on right side).
  • Page 120 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.1.14 Evaporator 1. Follow the procedure in paragraph [rack support and cell probe 1 to 2], sequence 2. Lift the evaporator conveyor to remove it from the hinges and rest it carefully inside the cell (Fig.1).
  • Page 121 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 • • • • • DOC NUMBER 595R36300...
  • Page 122 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.1.15 Electrical box 1. Unscrew the three screws on the lower side of the condenser panel (Fig. 1). 2. Remove the condenser panel: slide it slightly to right then pull (Fig. 2).
  • Page 123 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.1.16 Compressor 1. Follow the procedure in paragraph [Accessing the components on the back side of the appliance] to reach the compressor. 2. Close the low pressure supply by screwing clockwise the valve, then wait for 10 minutes (Fig. 1).
  • Page 124 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.1.17 Solenoid valve 1. Follow the procedure in paragraph [Accessing the components on the back side of the appliance] to reach the solenoid valve. 2. Remove the screw of the power connector on the coil of solenoid valve (Fig. 1).
  • Page 125 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.1.18 Finned Coil Condenser 1. Follow the procedure in paragraph [Electrical Box], sequence 1 and 2, to remove the condenser panel. 2. Unscrew the two screws on the inner side of both frontal feet (Fig. 1).
  • Page 126 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 • • • DOC NUMBER 595R36300...
  • Page 127 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.1.19 Condenser fan 1. Follow the procedure in paragraph [Accessing the components on the back side of the appliance] to reach the connector of the Condenser fan and disconnect it. 2. Unscrew the four screws of the fan grid to release the grid and the fan (Fig. 1) 3.
  • Page 128 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.1.22 Door 1. Unscrew the four screws of the upper hinge. 2. Remove the upper hinge and the pin (Fig. 1). 3. Lift the door to remove it from the lower support.
  • Page 129 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.1.25 Thermostatich valve 1. Follow the procedure in paragraph [Accessing the components on the back side of the appliance], 2. Remove the insulation pipe 3. Disconnect the connectors of wiring cable 4.
  • Page 130 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Access display and replacement of mambrane sticker ATTENTION! DOC NUMBER 595R36300...
  • Page 131 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 DOC NUMBER 595R36300...
  • Page 132 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 ATTENTION! DOC NUMBER 595R36300...
  • Page 133 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.2 Disassembly/Reassemble Of Components Range 30 Kg 6.3.2.1 Accessing the components on the back side of the appliance Ensure enough space around the appliance when operating on the backside. 1. Unscrew the four screw of the back spacer to remove it (Fig. 1).
  • Page 134 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.2.2 Rack supports 1. Unscrew the lock nut from the front right rack support (Fig. 1). 2. Release the spring on the top of the front left rack support (Fig. 2).
  • Page 135 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.2.3 Cell probe (blue) The cell probe is located inside the chamber, fixed on the fan protection grid. 1. Follow the procedure in paragraph [Rack support], sequence 1 and 2. 2. Remove also the pins of structure fixed on upper part of the cavity for open the carter (FIG 2) 3.
  • Page 136 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.2.4 Evaporator probe (grey) 1. Follow the procedure in paragraph [rack support point 1 to 2]. 2. Open the evaporator conveyor as shoved in the paragraph [cell probe point 2 three], find the evaporator probe and pull out carefully the sensor from its position (Fig.
  • Page 137 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.2.5 Food probe 1. Follow the procedure in paragraph [rack support point 1 to 2 and cell probe point 2 .3]. 2. Open the evaporator conveyor and unscrew the two screws shown in (Fig. 1) for remove the wiring cover.
  • Page 138 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.2.6 Condenser probe (black) 1. Follow the procedure in paragraph [Accessing the components on the backside of the appliance] to reach the connector of the condenser probe and disconnect it. 2. Pull out the condenser probe from its position (Fig. 1).
  • Page 139 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.2.8 Thermostat 1. Follow the procedure in paragraph [rack support point 4 to 5 and cell probe point 2 3]. 2. Open the evaporator conveyor and unscrew the nut shown in figure 1 to release the thermostats.
  • Page 140 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 • • • DOC NUMBER 595R36300...
  • Page 141 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.2.10 Heating element 1. Follow the procedure in paragraph [rack support 1.2 and cell probe 2 to 3], sequence 2. Disconnect the connector from clixson to heating element. 3. Follow the procedure in paragraph [Accessing the components on the backside of the appliance] to reach the connectors of the heating element to be replaced and disconnect them.
  • Page 142 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.2.12 Control Panel 1. Follow the procedure in paragraph [Command Panel], to remove the Command Panel. 2. Unscrew the four screws shown in figure 1 to disassemble the control panel (2 screws on top, one on left side, one on right side).
  • Page 143 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.2.14 Evaporator 1. Follow the procedure in paragraph [rack support 1 to 2 and cell probe 2 to 3], sequence 2. Lift the evaporator conveyor to remove it from the hinges and rest it carefully inside the cell (Fig.1).
  • Page 144 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 19. Restore the joint between the evaporator and the refrigerant circuit. 20. Restore the insulation of the pipes accurately. 21. Reassemble all the removed components following the inverse procedure. DOC NUMBER 595R36300...
  • Page 145 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.2.15 Electrical box 1. Unscrew the three screws on the lower side of the condenser panel (Fig. 1). 2. Remove the condenser panel: slide it slightly to right then pull (Fig. 2).
  • Page 146 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.2.16 Compressor 1. Follow the procedure in paragraph [Accessing the components on the backside of the appliance] to reach the compressor. Close the low pressure supply by screwing clockwise the valve,...
  • Page 147 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.2.17 Solenoid valve 1. Follow the procedure in paragraph [Accessing the components on the backside of the appliance] to reach the solenoid valve. 2. Remove the screw of the power connector on the coil of solenoid valve (Fig. 1).
  • Page 148 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.2.18 Finned Coil Condenser 1. Follow the procedure in paragraph [Electrical Box], sequence 1 and 2, to remove the condenser panel. 2. Unscrew the two screws on the inner side of both frontal feet (Fig. 1).
  • Page 149 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 • • DOC NUMBER 595R36300...
  • Page 150 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.2.19 Condenser fan 1. Follow the procedure in paragraph [Accessing the components on the backside of the appliance] to reach the connector of the Condenser fan and disconnect it. 2. Unscrew the four screws of the bracket fan from bottom to release the motor fan and the bracket (Fig.
  • Page 151 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.2.22 Door 1. Unscrew the four screws of the upper hinge. 2. Remove the upper hinge and the pin (Fig. 1). 3. Lift the door to remove it from the lower support.
  • Page 152 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.2.25 Thermostatich valve 1. Follow the procedure in paragraph [Accessing the components on the back side of the appliance], 2. Remove the insulation pipe 3. Disconnect the connectors of wiring cable 4.
  • Page 153 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Access display and replacement of mambrane sticker ATTENTION! DOC NUMBER 595R36300...
  • Page 154 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 DOC NUMBER 595R36300...
  • Page 155 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 ATTENTION! DOC NUMBER 595R36300...

  • Page 156: Preventive Maintenance Plan

    SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 6.3.3 Preventive Maintenance Plan 6.3.3.1 Refert to document “Check list preventive maintenance 7. RELATED DOCUMENTS Please refer to the spare parts catalogue of the unit: Code n°595R424.. BCF 6 gn 1/1 Code n°595R425..
  • Page 157 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Parameter Parameter Description Table Default {0, “Disabled”} FMAn enables/disables the Manual environment (factory setting) {1, “Enabled"} {0, “Disabled”} Faut enables/disables the Automatic environment (factory setting) {1, “Enabled"} {0, “Disabled”} FPRO enables/disables the Program environment (factory setting) {1, “Enabled"}...
  • Page 158 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Parameter Parameter Description Table Default Sets evaporator fan ON time when compressor is OFF. Valid CFon 18000 only for Conserve cycles Sets evaporator fan OFF time when compressor is OFF. Valid...
  • Page 159 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Parameter Parameter Description Table Default Delta beetwen cavity and food probe temperature during food probe recognition {0, “No speed regu- Configures appliance evaporator fans motor type. If motor with- lation”} out speed regulation is selected, eletrical wiring and user inter- {1, “Internal in-...
  • Page 160 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Parameter Parameter Description Table Default When the Out Evaporator temperature is higher than this pa- rameter the evaporator fan is stopped (evaporator fan stop func- tionality) When the cavity temp is lower than this parameter the evapora-...
  • Page 161 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 Parameter Parameter Description Table Default Cavity High temperature threshold: the warning is triggered if Cavity Temperature > (Cavity Set + HAC). Valid only for holding cycles. Cavity Low temperature threshold: the warning is triggered if Cavity Temperature <...
  • Page 162 SERVICE MANUAL Blast Chiller Freezer SKCH 30 50 70 DOC NUMBER 595R36300...
  • Page 163 Electrolux Professional SpA Sede legale Viale Treviso, 15 33170 Pordenone, ITALY Fax (+39) 0434 380 201 http://professional.electrolux...

This manual is also suitable for:

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