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Pratica FIT XL Installation Manual

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INSTALLATION AND
MAINTENANCE TECHNICAL
MANUAL
FIT XL
TRAINING AND SERVICE CENTER - CTS
Rev. 00 - April 2, 2024

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  • Page 1 INSTALLATION AND MAINTENANCE TECHNICAL MANUAL FIT XL TRAINING AND SERVICE CENTER - CTS Rev. 00 - April 2, 2024...
  • Page 2 Rev. 00 - April 2, 2024...
  • Page 3 5.4.2. User Setups ....................25 5.5. Sanitization ........................41 5.5.1. Catalytic Converter and Air Filter Sanitization ..........45 FIT XL Control System .................... 47 6.1. Power Electronic Board ....................47 6.1.1. Power Board Connection Scheme ..............48 6.1.2. Power Board Software Update ..............49 6.2.
  • Page 4 7.2. Heating Resistance ....................73 7.2.1. Resistance Test ..................74 7.2.2. Resistance Removal Procedure ............... 75 7.3. Solid State Relay ...................... 76 7.3.1. Solid State Relay Test ..................76 7.4. Fuse .......................... 77 7.4.1. Fuse Test ......................77 7.5. Thermostat ....................... 78 7.5.1.
  • Page 5 9.5.1. High Voltage Transformer Test ............... 115 9.6. High Voltage Capacitor ..................116 9.6.1. High Voltage Capacitor with Analog Multimeter Test ......117 9.6.2. High Voltage Capacitor with Digital Multimeter Test......118 9.6.3. Capacitance Test ..................119 9.7. High Voltage Diode ....................120 9.7.1.
  • Page 6 1. Introduction This manual is intended to FIT XL. FIT XL oven is indicated to quick completion of chilled or frozen foods, pre-fried, pre- baked snacks, lasagnas, pasta, sandwiches, escondidinhos, and other semi-ready foods, with outstanding flavor, visual and crispiness results. Forced air convection technology combined with microwaves enables heating, browning or roasting foods up to ten times quicker than traditional processes.
  • Page 7 FIT XL ovens have the following characteristics:  Ventless Technology, that does not require using hoods and exhaust systems;  It stores 1024 recipes with up to 8 steps each, divided into 16 groups;  USB connection for system updates and group, recipe and settings import/export;...
  • Page 8 2. Safety Instructions While operating and maintaining FIT XL ovens, follow the recommendations below: Attention: This oven has microwave energy that operates with high voltage and high current. Even though there is no hazard at normal operation, repairs must be performed with extreme caution.
  • Page 9 3. Installation Procedure FIT XL oven installation must be performed by an authorized technician, with cautions required, to prevent equipment problems and damages, and assure its full usage. Oven installation requires the following:  Physical space;  Electric power; Attention: The customer is responsible for preparation of every building point, as advised in this manual! 3.1 General Instructions and Dimensions...
  • Page 10  Not installing equipment at appropriate location can cause equipment warranty loss;  FIT XL oven dimensions (oven width, height, oven depth and distance with door open) are available in dimension table. Attention: Do not install the oven near materials, walls, ceiling or furniture that are easily flammable or heat-sensitive! Otherwise, protect them with non- flammable adequate materials, in compliance with fire prevention rules.
  • Page 11 The oven installation must be performed by a qualified technician. Make sure that building power grid electrical characteristics comply with FIT XL oven technical specifications, that are provided in nameplate located in panel rear and side part.
  • Page 12 FIT XL ovens leave factory with power cable and shielded plug already installed in control panel. It is not allowed to perform any other electrical connection and dimensional modification of cable, apart from its extension, replacing it for another cable with identical characteristics as the original one.
  • Page 13 16 mm² S >= 35 mm² 0.5 x S There is also an equipotential grounding system in FIT XL oven. This connection will also be performed between different pieces of equipment with terminal identified by equipotential symbol Equipotential Grounding Point Figure 8: Equipotential Grounding.
  • Page 14 4. FIT XL operation What are microwaves? Before understanding microwaves, we need to know what waves are. Wave, in physics study, is a perturbation that propagates in space or any other medium. Whenever we throw a rock on a lake, we can see the waves that spread, from the point where the rock hits the water.
  • Page 15 the length becomes smaller, and the frequency becomes higher. We can also see that microwaves are between TV transmission waves and infrared levels. ELECTROMAGNETIC SPECTRUM Low frequency communication AM radio transmission Short wave radio transmission FM and television radio transmission MICROWAVES Infrared Visible light...
  • Page 16 Microwave basic principle is cooking by molecular vibration. They penetrate foods superficially, at a depth that ranges from two to seven centimeters, vibrating water, fat and sugar molecules, heating them. Heat is transmitted to food inside through thermal conduction, demystifying the idea that microwaves cook foods from inside to outside. 5 to 7 cm 2 to 3 cm Thicker foods...
  • Page 17 Electromagnetic field polarity inversion Figure 18: Molecule behavior as magnetic field is inverted FIT XL operates through microwave combination with hot air aimed at food. Operation variables include:  Operation time;...
  • Page 18 Temperature usually kept will be the one to which pre-heating was programmed. What is more, among other functions, equipment is activated to keep pre-heating temperature. Microwave: FIT XL oven microwave power is adjustable between 0% and 100% for each 30-second fraction. For instance, in a 1-minute recipe, if microwaves are programmed to 50%, they will have effect on food for 15 seconds, will stop for another 15 seconds, will act again for 15 seconds, and finally, will stop for the last 15 seconds.
  • Page 19 USB Input Indicating Light Bar Pushbutton On/Off Figure 19: FIT XL Control Panel. FIT XL has a light bar that indicates the process in in progress through different colors, according to the following table: Function Color Status Turning On / Stand-by...
  • Page 20 5.2. Pre-heating 1. To start over pre-heating process, upon turning on the equipment, choose between Pre-Heating Group 1 and Pre-Heating Group 2. Figure 20: Pre-Heating Temperature Selection 2. The following screen will provided the ACTUAL temperature, PROGRAMMED temperature, and bar indicating remaining time to use the equipment. Figure 21: Pre-heating screen.
  • Page 21 5.3. Recipe Execution 1. Upon pre-heating, select GROUP desired. Slide the finger over the screen to view every group. Figure 22: Recipe Group Selection. 2. Selected group RECIPES will be displayed, press over recipe desired. Figure 23: Recipe Selection.  To return to GROUPS screen, actuate the button: ...
  • Page 22 4. It is possible to check resistance temperature by pressing button . In case you wish to cancel a recipe execution, actuate button Figure 25: Chamber temperature view. 5. If equipment door is opened, operation will be paused; upon closing door, operation will be resumed by actuating the button Figure 26: Recipe Paused.
  • Page 23 8. Upon a recipe completion, the following options will be released: Figure 28: Recipe Completed. Heat/Brown More: Activates microwaves and hot air for a pre-set time. Brown More: Actuates only hot air within pre-set time. Heat More: Actuates only microwaves within pre-set time. Repeat Recipe: Repeats the same recipe chosen by user.
  • Page 24 3. Actuating again icon , you will return to Recipe Group screen. 4. Pressing icon will lead to pre-heating selection screen again. 5.4.1. Manual Mode In Manual Mode, it is possible to set step parameters, and if test result is approved, transform it into recipe by the end of operation.
  • Page 25 5. Upon entering user password, choose between creating a group or allocating parameters moved into a new recipe within an existing group. Figure 32: Group Choice. 6. Set New Recipe name, Image, and choose in which position (step) you wish to allocate information moved.
  • Page 26 5.4.2. User Setups 1. On Options screen, click on icon . Screen to enter User Password will be displayed. Settings access standard password is 456789. Password can be changed (see page 39). Figure 34: Access to User Settings. 2. User Settings screen is comprised by eleven items, slide the finger over the screen to access the next Options screen.
  • Page 27 5.4.2.1. User Settings: Edit Groups FIT XL oven has two pre-heating temperatures. Upon performing pre-heating, oven will display recipes related to selected pre-heating group. To edit groups, actuate icon , and Groups screen will be display, however in first position, the ion where it is possible to Create New Group will be found.
  • Page 28 5.4.2.2. User Settings: Edit Recipes 1. To edit recipes, actuate icon . Groups screen will be displayed. Choose which group you wish to modify recipes. Slide the finger over the screen to view every group. 2. As recipes are accessed, it will be possible to edit an existing recipe, or create a new one.
  • Page 29 As a recipe is developed, every variable above mentioned must be analyzed. Microwaves and air speed are the main preparation success components. To achieve quicker results at recipe development, we suggest to start with time programming at 1/10 of total preparation time in standard process. At first, focus only in microwave use to achieved food desired internal temperature, as microwave effect is more efficient in process start.
  • Page 30 4. Each step withstand up to 8 steps, active steps will be displayed in green in Edit screen, the others will be transparent, according to the next image. Click on a step to edit it. For each step, it is required to provide: Hot air speed Microwave % Temperature...
  • Page 31 5.4.2.4. User Settings: Current Temperature Current Temperature screen is for information only, it is possible to check in it what is chamber resistance temperature. Figure 42: Temperature Reading. 5.4.2.5. User Settings: Customer Service In Customer Service information, you will find all data required to contact Prática to solve doubts, request repairs or technical visits.
  • Page 32 5.4.2.7. User Settings: USB In USB option, it is possible to perform recipe import (in which pen-drive recipes are copied to oven), and export (in which recipes are copied from oven to pen-drive). Figure 45: USB option. As one of the functions is selected, the message: “Inset the pen-drive and wait for acknowledgment”...
  • Page 33 5.4.2.8. User Settings: Wi-Fi 1. To connect to Wi-Fi network, press the key . Slide the finger over the screen to view every network available. Figure 48: Wi-Fi Network List. 2. Click on Wi-Fi network to be connected, and then on "Enter Password". Use the keyboard to enter password and confirm by clicking on key Figure 49: Connection to Wi-Fi Network.
  • Page 34 2) On Web page, click on "Create Account" option: Figure 50: IOK Platform 3) Next, selected the proper category. Figure 51: IOK Platform Registration Rev. 00 - April 2, 2024...
  • Page 35 4) Enter your data and click on “Create Account”; Figure 52: IOK Platform Registration 5) You will receive an email message confirming your registration. Upon confirmation, simply return to website https://new.praticaiok.com/ and enter information registered. 6) Upon login, enter in "Equipment" option, on the screen left side. Figure 53: IOK Platform Equipment List.
  • Page 36 8) The following screen will be displayed. Figure 55: Equipment Registration. Now, it is required to access oven screen to achieve identification PIN; 9) On Options screen, click on icon . Screen to enter User Password will be displayed. access standard password is Settings 456789.
  • Page 37 Returning to computer Web page (from step 8), introduce PIN code achieved in previous step, create a new to your oven and click on "Save". Figure 58: Equipment Registration with PIN Number. As oven PIN code is saved, equipment serial number and name will be displayed on IOK website screen, in equipment list.
  • Page 38 5.4.2.10. User Settings: System Oven menu System option enables access to oven information and settings. System screen is comprised by eight items. Figure 59: System Options. 1) Systems: Languages To change language, simply click on icon to choose language desired. Slide the finger over the screen to view every language available.
  • Page 39 1. Click on to edit, respectively, date and time. Actuate to change date/time format. The next screen will be displayed, choose date, time format, and click on to confirm and return to options. Figure 61: Date/Time Settings. 3) System: Change Password To change user password, click on icon , simply enter new password and then confirm it.
  • Page 40 4) System: Restore Factory Settings Attention: Restore Factory Settings option will delete every Group, Recipe and Step, and Settings defined by user. Make sure to create backup via USB before proceeding. To restore factory settings, click on icon , enter user password and then confirm it. Figure 63: Restore Factory Settings.
  • Page 41 6) System: Manufacturer Information In Information option, it is possible to check oven model (FIT XL), firmware (software) version, serial number and manufacturing date. Already defined through technical setting. To view manufacturer information, click on icon Figure 65: Manufacturer Information.
  • Page 42 Gloves Goggles Figure 66: Personal Protection Equipment. To clean FIT XL oven, we recommend Oven Cleaner (degreasant) and Oven Protector (anti-fat protector) of Prática Technicare line: Figure 67: Sanitization Products. To enable oven sanitization, use Daily Cleaning Guide. Access it by clicking on Options icon, then actuate icon .
  • Page 43 1. Open the door and wait until temperature decreases to 50°C. Click on arrow to proceed: Figure 68: Chilling Oven. 2. Remove speed grill and catalytic converter and place them on the sink. Click on arrow to proceed: Figure 69: Accessory Removal. 3.
  • Page 44 4. Apply Oven Cleaner on chamber walls and door inside, let it act for 5 minutes. Press play to start time count. Figure 71: Product Action Time. 5. Use non-abrasive sponge to clean all chamber and roof. Click on arrow to proceed: Figure 72: Non-Abrasive Sponge Cleaning.
  • Page 45 7. Apply vinegar in all oven cavity and door, and spread it. Click on arrow to proceed: Clean/rinse cavity with damp cloth to remove vinegar excess and dry with dry towel. Click on arrow to proceed: Figure 74: Vinegar Application. 8.
  • Page 46 10. Install catalytic converter and speed grill properly. Finish by clicking on arrow: Figure 77: Accessory Fitting. 5.5.1. Catalytic Converter and Air Filter Sanitization 1. Remove catalytic converter by pulling it upward, and then forward, according to the following image: Catalytic Converter Figure 78: Catalytic Converter Removal.
  • Page 47 3. For air filter access, open oven trough. Then, remove filter with a motion forward, using filter flaps, according to the following image: Air Filter Figure 79: Air Filter Removal. 4. To sanitize correctly, soak filter in lukewarm water with mild soap. Upon 15 minutes in solution, rinse well and install it again.
  • Page 48 6. FIT XL Control System FIT XL oven is equipped with control system through electronic boards (HMI, power board and fan control board), and temperature sensors and current sensor. Such control system elements communicate through a communication network named CAN NETWORK.
  • Page 49 6.1.1. Power Board Connection Scheme Frequency Inverter B – Blue/Blue Cable. Temperature Sensor GR – Blank. T1 + – Chamber Sensor Positive. Light Bar O12 – Blank. O11 – Blue Cable. O10 – Brown Cable. O8 – Buzzer. Micro Switches O7 –...
  • Page 50 6.1.2. Power Board Software Update To update POWER board, a pen-drive formatted in "FAT32". Update file "power.bin" must be placed in pen-drive root, without any folder or sub-folder. File is available with Prática technical support team, and can also be found on link: power.bin It is required to make sure that file name is correct.
  • Page 51 2) De-energize Power board, removing supply terminal 12VDC; Figure 84: De-energized board. 3) Insert pen-drive with update file in board USB input; Figure 85: Pen-drive inserted. Count up to 3 Press oven On/Off button and while keeping it press, energize oven board. seconds and release the button.
  • Page 52 In case LEDs have any behavior different from pattern above mentioned, it can indicate errors in update process, as provided in the following table: Blinks Description Possible Causes Update performed successfully. Pen-drive not detected.  Defective pen-drive or badly inserted in board;...
  • Page 53 6.2. HMI Electronic Board HMI board is operator interaction with oven, it provides time indications, temperature, operation status and error indications. Every FIT XL oven operation command comes from HMI board. It is responsible for submitting operation information to Power board through CAN network communication cable.
  • Page 54 6.2.2. Warning and Error Codes FIT XL oven has programming to signal any possible error and warning that may occur within operation. In this case, over Options icon, yellow signal for warnings ( ), and red for errors ( ) will be displayed.
  • Page 55 6.2.3. HMI Electronic Board Technical Programming Attention: as HMI Electronic Board replacement is performed, it is required to set it according to the following procedure: 1. On Options screen, click on icon . Password will be requested. Manufacturer settings access password is 459381. Figure 92: Access to Manufacturer Settings.
  • Page 56 1) Current Sensor In these Settings, it is possible to enable or disable current sensor use. To enable sensor, simply click on Current Sensor icon, as it is enabled, the icon will be highlighted in blue color, and whenever disabled, icon will remain in grey color. ENABLED DISABLED Figure 94: Enable or Disable Current Sensor.
  • Page 57 3) Motor Control Here, inverter model used in FIT XL oven is set up, wrong setting or not setting results that electronic boards fail to communicate with inverter, causing inverter error. Figure 96: Motor Control Settings. As inverter model used is selected, icon related to it will be highlighted.
  • Page 58 5) Load Test Through Load Test, it is possible to check operation of a few electrical components, including: buzzer, microwave circuit, general contactor, chamber resistance, cooling fan, frequency inverter and indicating light bar. Figure 98: Load Test. 6) Read Inputs On this screen, it is possible to check micro switch operation.
  • Page 59 8) Change Password To change user password, click on icon , enter password “456789”, click on icon , and then click on icon Enter new password and confirm it. If you forget the password, create a new one in technical settings. Figure 101: Change Password.
  • Page 60 6.2.4. Ignore Pre-Heating In a maintenance occasion that technician requires fast access to recipe group of pre- heating group 1 or pre-heating group 2, it is possible to reach group screen without waiting for the oven to finish pre-heating process. To do that, enter code 300000 to access recipe group of pre-heating group 1.
  • Page 61 Touch the red points (+) displayed on screen. For each point pressed, a confirmation will be displayed on screen. Figure 105: Confirmation Screen. By the end of calibration, screen will be grey. Touch on square on screen upper left side, until a new black windows is open. Figure 106: Grey Screen Upon Calibration.
  • Page 62 6.2.6. HMI Software Update It is possible to update HMI board software in two ways: the first is using Prática IOK platform and perform update process with oven connected to internet network, and the second is using a pen-drive with update file. ...
  • Page 63 4. Upon clicking on update, it is required to return to oven and enter in System - System Update - HMI - Wi-Fi - Check Update - SIM option. System System Update Figure 109: Update Equipment via Wi-Fi. Attention: DO NOT TURN OFF OR DE-ENERGIZE OVEN WHILE UPDATE IS IN PROGRESS! WAIT UNTIL PRE-HEATING SCREEN RETURNS.
  • Page 64 10) Select “Save update file in pen-drive” option. Figure 111: Save update file in pen-drive. 11) Select file to be downloaded according to oven model. Figure 112: Download Update File. 12) With file downloaded in your computer, simply copy it to USB drive. Attention: File is compressed and must be copied in pen-drive root.
  • Page 65 13) With update file in USB Drive, it is required to return to oven and enter in System - System Update - HMI - USB - Check Update option. System System Update Figure 114: USB Update. Attention: DO NOT REMOVE THE PEN-DRIVE, TURN OFF OR DE- ENERGIZE OVEN WHILE UPDATE IS IN PROGRESS! WAIT UNTIL PRE- HEATING SCREEN RETURNS.
  • Page 66 6.3. Temperature Sensor FIT XL oven has type J temperature sensor. It is responsible for measuring chamber inside temperature. Oven temperature sensor is located in right side, and fastened by a nut. Figure 115: Chamber Sensor Location 6.3.1. Temperature Sensor Operation Also known as thermoelectric sensor, J type sensor operation principle is voltage temperature difference direct conversion.
  • Page 67 Sensor cable Red: Positive (+) Blue: Negative (-) Figure 117: Sensor Color Pattern.  In “white and red” setting, white cable is positive. Sensor cable White: Positive (+) Red: Negative (-) Figure 118: Sensor Color Pattern.  In “white and black” setting, black cable is positive. Sensor cable White: Negative (-) Black: Positive (+)
  • Page 68 6.3.2. Temperature Sensor Test To test J type sensors, a special multimeter is required, capable of measuring very small voltages accurately. However, a tests are provided as follows, that can enable diagnosing whether the defect is in sensor or electronic controller. 1.
  • Page 69 6.4. Current Sensor To monitor microwave circuit operation, FIT XL oven has current sensor installed in microwave circuit grommet cable 36. Its function is measuring current flowing through microwave circuit. In case electrical current is not higher than 11A in circuit after 10 seconds, MAGNETRON ERROR alarm will be presented.
  • Page 70 6.5. Door Sensor FIT XL oven has three standalone door micro switches to control door position during its operation. Micro switches are referenced in electrical scheme as W1 (Primary), SW2 (Secondary) and SW3 (Monitor). Primary and Secondary micro switches are located in oven right side. They can be easily accessed by removing right side lid.
  • Page 71 LED lights are used in control board to indicate three door circuit breaker contact position. When LED is on, circuit breaker position is open, and vice-versa. Control board identifies LEDs as SW1 (Primary) and SW2 (Secondary). LEDs turn on when power supply is on (and door is open). Oven does not have to be on, only energized, to test circuit breaker positions.
  • Page 72 6) Open and close the door while checking LED light sequence in control board, SW1 first, SW2 second and SW3 is the lat to be turned off as the door is open. 7) Loose monitor micro switch screws. 8) Adjust vane position to 0” (0mm) in relation to switch body. This circuit breaker must be fully closed when door is in open position.
  • Page 73 7. Heating System: FIT XL oven has chamber heating through electrical resistance. In this heating system, circular electrical resistance is used, installed around the turbine located in oven rear. Such resistance layout type is more efficient to distribute heat inside the chamber.
  • Page 74 This process happens automatically during oven usage, to keep its temperature. 7.2. Heating Resistance FIT XL oven has 230V circular resistance of 2800W power, in a single filament. Figure 128: Resistance.
  • Page 75 7.2.1. Resistance Test 1. Actuate pre-heating function. Figure 130: Pre-heating screen. 2. Measure electrical voltage in cables that supply resistance:  If the multimeter does not measure voltage in terminals, check operation of safety thermostat, resistance actuation contactor, and oven controller relay; ...
  • Page 76 7.2.2. Resistance Removal Procedure 1) Turn off the oven and remove from power outlet. 2) Assisted by 10 mm nut driver, loose MI motor screws. MI Engine Spring Washer M6 Brass Nut M6 Figure 131: MI Motor removal. 3) Loose fastening nuts and washers from resistance. Nut M6 Fastening Washer Figure 132: Resistance Removal.
  • Page 77 Figure 133: Solid State Relay. FIT XL oven has solid state relay for resistance actuation. State relay is energized with 12VDC, through Power electronic board, and as command signal is received in input terminals, SSR is actuated, leading supply to load.
  • Page 78 7.4. Fuse Fuses are safety devices that protect electrical circuits against damages that can be caused by electrical current overload. Inside fuses, there is a lead or tin wire of various dimensions, made to withstand specific temperature limit, and then melt, interrupting electrical current circuit.
  • Page 79 7.5. Thermostat Safety thermostat, as the name suggests, is a device intended to offer further protection,and consequently, more quality to oven heating systems. FIT XL oven uses 400°C safety thermostat of automated reset bulb type, connected in series with heating resistance.
  • Page 80 7.5.1. Cautions with Bulb Thermostats Thermostat has a bulb that is installed in adequate region for each measurement. To perform thermostat installation and handling, following the recommendations below: 1) Do not perform stressed folds and do not use tools over capillary pipe due to choking, break or fissure risk (comply with minimum 3 mm radius).
  • Page 81 This frequency adjustment capacity enables controlled variation in motor rotation speed, enabling energy efficiency and accurate control of process. Frequency inverters that can be used in FIT XL oven include:  CFW100 (WEG)  D700 (Mitsubishi) ...
  • Page 82 MODBUS NETWORK communication leaves from power electronic board with direct connection in terminal and cable grounding, and ends in frequency inverter with RJ45 connector. Electronic Board Communication Cable Connection Communication Cable Grounding RJ45 Connector Figure 140: MODBUS NETWORK Communication. At a possible communication failure between board and frequency inverter, electronic board will turn inverter on and off ten times, with the purpose of reestablishing communication.
  • Page 83 8.1. Frequency Inverter (CFW100 – WEG) This inverter uses data communication protocol named MODBUS to communicate with main control board. The following image shows frequency inverter connections. Figure 142: Frequency Inverter MITSUBISHI D700. Attention: Grounding wire must be properly connected to oven chassis to assure inverter communication cable adequate grounding.
  • Page 84 8.1.1. Failure History Frequency inverter can present a few warning, alarms and failures that are registered in its memory and provided in its display. Figure 145: Failure History Access. Warning, failure and alarm indication list is provided as follows: Failure / Alarm Description Probable Causes F234...
  • Page 85 Failure / Alarm Description Probable Causes F021 Intermediate circuit undervoltage ■ Wrong supply voltage, check if inverter label data DC busbar undervoltage failure. complies with supply network and parameter P296. ■ Too low supply voltage, causing DC busbar voltage lower than minimum value (in P004): Ud < 200 VDC in 200- 240 VAC.
  • Page 86 Failure / Alarm Description Probable Causes A046 Motor overload alarm. ■ P156 adjustment with low value to motor used. High Motor Load ■ High motor shaft load. A050 High temperature alarm measured in ■ High IGBT temperature (P030 > 110°C). Power Module high temperature sensor (NTC) of power ■...
  • Page 87 8.1.2. Inverter Parameterization To control motor speed, frequency inverter uses programmable parameters according to application required. Parameter programming is performed on inverter screen through buttons. 1. Click on button Figure 146: Access to Parameterization. Press buttons , to browse within parameters; Figure 147: Browsing within Parameters.
  • Page 88 8.2. Frequency Inverter (D700 - Mitsubishi) Figure 149: Frequency Inverter MITSUBISHI D700. 8.2.1. Failure History Frequency inverter can present a few warning, alarms and failures that are registered in its memory. 1. To access failure history, press MODE button twice. Figure 150: Failure History Access.
  • Page 89 Warning, failure and alarm indication list is provided as follows: Inverter Panel Indication Description E--- Failure History HOLD Operation panel lock Er1 –Er4 Parameter recording error LOCD Password locked Err. Inverter reset Stall prevention (over-current) Stall prevention (overvoltage) Regenerative brake pre-alarm Electronic thermal relay function pre-alarm PU stop Maintenance signal output...
  • Page 90 E.THT Inverter overload disengaging (electronic thermal O/L relay function) E.THM Motor overload disengaging (electronic thermal O/L relay function) E.FIN Heat sink overheat E.ILF Input phase loss E.OLT Stall prevention stop E. BE Brake transistor alarm detection E. GF Ground (earth) failure over-current in start output side E.
  • Page 91 8.2.2. Inverter Parameterization To control motor speed, frequency inverter uses programmable parameters according to application required. Parameter programming is performed on inverter screen through buttons and knob. 1. Click on MODE button; Figure 152: Access to Parameterization. 2. Turn knob to browse within parameters; Figure 153: Browsing within Parameters.
  • Page 92 8.2.3. Reset Parameters and Alarms Inverter Mitsubishi D700 can be restored to factory standards through access to parameter ALLC. Through this parameter, it is possible to delete parameters set and alarm history. 1. To access this parameter, click once on MODE button; Figure 156: History and Parameter Erasing.
  • Page 93 8.3. Frequency Inverter (SINAMICS V20 - Siemens) Figure 160: Frequency Inverter Sinamics V20. 8.3.1. Failure History Frequency inverter can present a few warning, alarms and failures that are registered in its memory. As a failure takes place, failure icon is on, and display screen undergoes transition to failure screen.
  • Page 94 Warning, failure and alarm indication list is provided as follows: Indication Description Cause  Motor power (P0307) must correspond to inverter power (r0206) Over-current  Motor cable short circuit  Ground failures  Too high grid supply voltage Overvoltage  Motor is in regenerative mode ...
  • Page 95  Motor data identification  r0949 = 0: No load applied  r0949 = 1: Current limit level reached during identification Motor data identification  r0949 = 2: Stator resistance identified lower failure than 0.1% or higher than 100%  r0949 = 30: Current controller in voltage limit ...
  • Page 96  No USS adjustment point values during USS adjustment point failure telegram time off  No USS / MODBUS adjustment point values USS / MODBUS adjustment point failure during telegram time off  Broken wire Analog input signal loss  Signal out of limits ...
  • Page 97  There are damage conditions due to cavitation. Cavitation damage is damage caused in pump, in pumping systems, whenever fluid does not F410 Cavitation protection failure have enough flow. It can lead to heat increase and subsequent pump damage.  Motor load conditions indicate belt or mechanical failure F452 Load monitoring interruption...
  • Page 98  Braking energy is too high A535 Brake resistor overload  Braking resistor is not adequate to application  Identification data motor (P1900) selected or Motor data identification A541 enabled running  Invalid internal time portion A600 Overspeed alarm in RTOS ...
  • Page 99 8.3.2. Inverter Parameterization To control motor speed, frequency inverter uses programmable parameters according to application required. Parameter programming is performed on inverter screen through buttons. 1. Click on button for 3 seconds; Figure 161: Access to Parameterization. Press buttons to browse within parameters; Figure 162: Browsing within Parameters.
  • Page 100 8.3.3. Reset Parameters and Alarms Inverter Siemens Sinamics V20 can be restored to factory standards through access to parameter P0970. Through this parameter, it is possible to delete parameters set and alarm history. 1. Click on button for 3 seconds; Figure 165: Access to Parameterization.
  • Page 101 8.4. Frequency Inverter (FC-051PK37 C - Danfoss) Figure 168: Frequency Inverter FC-051. This inverter uses data communication protocol named MODBUS to communicate with main control board. Communication cable must have its mesh grounded through metallic support in inverter output. To perform grounding correctly, simply strip cable part that will contact metallic support, as provided by the following image.
  • Page 102 Warning, failure and alarm indication list is provided as follows: Indication Description Cause Terminal 53 or 60 signal is lower than 50% of value defined in:  parameter 6-10 Terminal 53 Low Voltage Zero live error  parameter 6-12 Terminal 53 Low Current ...
  • Page 103 Missing phase W in motor Motor phase W loss. Check phase Internal defect Possible manufacturing defect Grounding failure Ground output phase discharge Control Voltage Failure 24 V DC is overloaded Motor voltage and/or motor current incorrect AMA Unom and Inom check settings Low AMA Inom Motor current is too low.
  • Page 104 8.4.2. Inverter Parameterization To control motor speed, frequency inverter uses programmable parameters according to application required. Parameter programming is performed on inverter screen through buttons. 1. Click on button until the following screen is displayed; Figure 170: Access to Parameterization. 2.
  • Page 105 8.4.3. Reset Parameters and Alarms Inverter FC-051 of Danfoss can be restored to factory standards through access to parameter 0-51. Through this parameter, it is possible to delete parameters set and alarm history. 1. Click on button until the following screen is displayed; Figure 173: Access to Parameterization.
  • Page 106 8.5. Engine FIT XL oven has 220V three-phase motor to move turbine clockwise. This motor is especially capable of operating in high rotations at maximum 100Hz frequency. Figure 176: Engine 8.5.1. Motor Operation Motor is controlled by frequency inverter, which is capable of ranging its speed according to customer requirement.
  • Page 107 8.5.1. Engine Test Motor is located in oven rear. To perform tests, proceed according to the following instructions: 1) Remove oven rear closing. 2) Disconnect 3 motor cables (U, V and W). 3) Measure continuity within 3 coils in different combinations. Figure 178: Motor Coil Test.
  • Page 108 8.5.3. Motor Removal Procedure 1. Assisted by 10 mm socket wrench, loose MI motor fastening screws. MI Engine Spring Washer M6 Brass Nut M6 Figure 179: Motor MI Fastening Screw Removal. 2. Remove motor MI, pulling backward. Figure 180: MI Motor removal. 3.
  • Page 109 Gasket Gasket Mirror Turbine Spring Washer Screws Left ¾ Thread Nut Figure 181: MI Motor Fastening Removal. 6. Loose screws that fasten motor support. Figure 182: Motor Support Removal. Attention: As turbine or motor replacement is performed, replaced sealing gasket. 7.
  • Page 110 Microwave system is the oven most complex system. Take extreme care during service, to protect operator and technician. FIT XL oven has two microwave circuits. Such microwave circuits are comprised by protection fuse, power relay, transformer, capacitor, diode, magnetron and thermostat. And, to monitor such circuit operation, current sensor is used (clamp-on ammeter).
  • Page 111 9.1. Microwave System Operation When high voltage transformer is supplied with 220VAC, 3.6VAC and 2,000VAC voltages are generated in secondary. 3.6 V voltage heats Magnetron filament that emits electrons. 2,000VAC supply AC voltage positive half-cycle and loads capacitor. In this half- cycle, diode acts as short circuit, enabling all current to flow through it to grounding.
  • Page 112 9.2. Microwave Power Measurement Test Microwave output power measurement is performed with microwave oven connected at its rated voltage, and turned on at its maximum microwave power (100%) with 300ml drinking water load inside the oven. Water must be added in a transparent vessel at microwaves, including glass and porcelain, with maximum 3 mm material thickness.
  • Page 113 9.3. Power Relays There are two relays in microwave circuit, one actuation relay, and another short circuit one. Figure 188: Power Relay. Actuation relay is responsible for energizing microwave circuit, submitting power to high voltage transformers. Electronic board monitors door position through primary and secondary port (SW1 and SW2) micro switches.
  • Page 114 2. With relay coil supply, it is required to check if normally open contacts (4 with 7, and 6 with 9) close, and normally closed contacts (1 with 7, and 3 with 9) open. ● If normally open contacts close and normally closed contacts open, relay is good; ●...
  • Page 115 9.5. High Voltage Transformer Microwave circuit high voltage transformer is comprised by three coils. Low voltage primary coil / line (208V / 220V / 240V), low voltage secondary coil / voltage (3.6V), and high voltage secondary coil / voltage (2000V). High voltage secondary terminal (2000V) grounded in transformer body High voltage secondary...
  • Page 116 9.5.1. High Voltage Transformer Test To test or remove high voltage components, make sure the circuit is turned off and that high voltage capacitor is discharged. To do that, turn power grid equipment off and wait for 5 minutes. Low Voltage Primary Coil Test (208V /220V and 240V) 1.
  • Page 117 High Voltage Secondary Coil Test (2000V) 1. With Ohmmeter in low scale (X1), measure resistance between high voltage terminal and transformer body. Figure 193: 2000V transformer secondary test. ● If resistance value measured is approximately 50Ω, transformer is good. ● If value measured is extremely high, low or infinite, replace transformer. 9.6.
  • Page 118 9.6.1. High Voltage Capacitor with Analog Multimeter Test To test or remove high voltage components, make sure the circuit is turned off and that high voltage capacitor is discharged. To do that, turn power grid equipment off and wait for 5 minutes. 1) To test capacitor, analog multimeter with at least 9V battery is required.
  • Page 119 9.6.2. High Voltage Capacitor with Digital Multimeter Test To test or remove high voltage components, make sure the circuit is turned off and that high voltage capacitor is discharged. To do that, turn power grid equipment off and wait for 5 minutes. 1) To test capacitor, digital multimeter and 9V battery are required.
  • Page 120 9.6.3. Capacitance Test To test or remove high voltage components, make sure the circuit is turned off and that high voltage capacitor is discharged. To do that, turn power grid equipment off and wait for 5 minutes. 1) To test capacitor, digital multimeter with capacitance reading function is required. 2) Turn off oven supply circuit breaker, and wait for 5 minutes for high voltage capacitor to discharge.
  • Page 121 9.7. High Voltage Diode High voltage diode is a device that enables current to flow in one direction, however it prevents current flow in another direction. This component transforms direct current into alternate. This special diode has larger body than common diode, and it is adequate to operate with high voltages.
  • Page 122 9.7.2. High Voltage Diode with Digital Multimeter Test To test or remove high voltage components, make sure the circuit is turned off and that high voltage capacitor is discharged. To do that, turn power grid equipment off and wait for 5 minutes. 1.
  • Page 123 9.8. Magnetron Considered microwave oven “heart”, Magnetron is a special valve, responsible for generating microwaves. Figure 202: Magnetron. Magnetron structure is basically comprised by anode, filament (cathode), and antenna. Anode is a hollow, iron part, with several open cavities, which are comprised by even fin number, pointing to filament.
  • Page 124 Magnetic field inclusion, created by permanent magnets, enables electrons to describe a circular motion between cathode and anode. MAGNET MAGNET Figure 205: Magnetron Electron Motion. As electrons turn around anode fins, ANTENNA alternate current is induced in resonance ANODE cavities, resulting in continuous oscillation of resonating circuits.
  • Page 125 4) Measure resistance through filament terminals in Magnetron with Ohmmeter adjusted at its lowest resistance scale (X1). Figure 207: Magnetron Filament Test. ● If a resistance close to zero ohm (0Ω) is indicated, proceed to next test; ● If high or infinite resistance is indicated, filament is open (rare defect), replace Magnetron and check oven correct operation.
  • Page 126 10. Microwave Distribution and Sealing System 10.1. Microwave Distribution For microwave uniform distribution, FIT XL oven has two injected aluminum wave guides, and two stirrer motors with antenna, protected against dirt by Teflon plate, and mica plate fixed inside the chamber in oven upper part.
  • Page 127 10.2. Stirrer Motor To enable microwave uniform distribution, FIT XL oven has two stirrer motors that rotate two antennas located in oven upper part. Such motors are supplied with 220VAC while oven is on, and has 40rpm rotation. Figure 210: Stirrer Motor.
  • Page 128 11. Cooling System FIT XL oven ventilation system is comprised by 2500 RPM radial fan, measuring 195 mm x 195 mm. This fan removes hot air from all oven internal panel. Hot Air Output Radial Fan Figure 211: Ventilation System.
  • Page 129 A comparative table for 220VAC supply is provided below. Input Voltage Output Voltage 0 VDC 0 VAC 1.67 VDC 20 VAC 3.33 VDC 100 VAC 4.6 VDC 155 VAC 6.66 VDC 195 VAC 8.33 VDC 210 VAC 10 VDC 220 VAC 11.1.
  • Page 130 12. Problems, Causes and Solutions Here, we provide small problem list that can happen and solved directly through equipment operators or technical intervention. Problem Cause Solution w/ Operator Oven will not turn on Power blackout. Check circuit breaker and outlet. Burned fuse.
  • Page 131 13. Attachments EXPLODED VIEW - FIT XL ELECTRICAL SCHEME - FIT XL 220V 60HZ ELECTRICAL DIAGRAM - FIT XL 208V 240V 60HZ UL FDA Rev. 00 - April 2, 2024...
  • Page 132 Contact us: Technical Support: (35) 3449-1213 (35) 3449-1222 www.praticabr.com PRÁTICA PRODUTOS S/A. Headquarters | Rodovia BR 459, km 101 – 37556-140 – Pouso Alegre/MG – Brazil São Paulo Branch Office | Rua Dr. Virgílio de Carvalho Pinto, 612 – Pinheiros – 05415-020 –...