Hoshizaki BAKER GA 550 Service Manual
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Hoshizaki BAKER GA 550 Service Manual

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HOSHIZAKI EUROPE B.V.
SERVICE MANUAL
BAKER GA 550 & 950
1

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  • Page 1 HOSHIZAKI EUROPE B.V. SERVICE MANUAL BAKER GA 550 & 950...

  • Page 2: Table Of Contents

    HOSHIZAKI EUROPE B.V. Content 1) Safety Information ........................3 2) Intended Use..........................3 3) Suitable Installation Site ......................3 4) Setting up Several Cabinets Side by Side ................... 5 5) Unpacking and Installing the Cabinet ..................6 6) Water Circulation ........................7 7) Electrical Connection.

  • Page 3: Safety Information

    HOSHIZAKI EUROPE B.V. 1) Safety Information This service manual does not include comprehensive operating instructions for the user; it is only a further supplement to the operating instructions. It is intended for a trained service technician. As a result, many important safety instructions for the user are missing with regard to the scope and readability.
  • Page 4 HOSHIZAKI EUROPE B.V. For electrical safety reasons, the cabinet must not be operated outside. The refrigeration technology of the cabinet does not function outside or in unheated rooms (particularly in colder seasons) and can be damaged by low temperatures. Avoid placement of the product in a chlorine/acid-containing environment due to risk of corrosion.

  • Page 5: Setting Up Several Cabinets Side By Side

    HOSHIZAKI EUROPE B.V. 4) Setting up Several Cabinets Side by Side Depending on the temperature and humidity at the installation site as well as the selected set point temperature, the moisture in the ambient air can condense on the surface of a refrigerating unit due to its design.

  • Page 6: Unpacking And Installing The Cabinet

    HOSHIZAKI EUROPE B.V. 5) Unpacking and Installing the Cabinet When receiving the product, check the packaging material for damage. If any damage occurs at the packaging material, it should be considered if the product might have been damaged too. If the damage is substantial, please contact your dealer.

  • Page 7: Water Circulation

    HOSHIZAKI EUROPE B.V. 6) Water Circulation HUMIDIFIER The cabinet is equipped with a humidifier that provides steam during proving. The humidifier consists of a water tank heated by electrodes. From the tank, steam is led into the cabinet through a pipe. The tank is automatically filled from the water supply.
  • Page 8 HOSHIZAKI EUROPE B.V. Adjustments related to water conductivity In order to gain access to the area where the settings related to the water conductivity can be adjusted, it is necessary to access the service level of the controller (level III). How to access this area is described under “Entering the service parameters, level III”.

  • Page 9: Electrical Connection

    If the product is defective, it must be examined by a service electrician during the guarantee period. Outside the guarantee period, it is advisable to use the service advised by Hoshizaki Commercial, if possible. If this is not the case, assistance is required from a refrigeration company with knowledge of Baker products.

  • Page 10: Instructions For Daily Use

    HOSHIZAKI EUROPE B.V. Always disconnect the power if interruptions in power supply occur, and when electrical parts are removed/put on, and before cleaning and maintenance of the product. Do not use the product before all coverings are installed, so that live or rotating machine parts can not be touched.

  • Page 11: Cleaning And Maintenance

    HOSHIZAKI EUROPE B.V. 9) Cleaning and Maintenance The cabinet must be cleaned regularly. The intervals depend on the usage and level of soiling (at least annually). Before carrying out any cleaning or maintenance operations, unplug the unit. Don’t touch or wet the machine compartment parts. This could result in failure or breakdown.
  • Page 12 HOSHIZAKI EUROPE B.V. Condenser Use vacuum cleaner or a soft brush to remove dust and stains from the condenser. Warning: If users clean the condenser with a hard brush, such as a dishwasher brush, the coating of the condenser may peel off.

  • Page 13: Control Elements

    HOSHIZAKI EUROPE B.V. 10) Control Elements Overview of the display: To ensure reliable processes for Freezing (1), Storage (2), Thawing (3), Proving (4), and Holding (5) the cabinet must be furnished with controls to regulate the air temperature, ventilation, and relative humidity.
  • Page 14 HOSHIZAKI EUROPE B.V. When the unit is connected with the lighting mains and the main breaker is switched on, then the standby display is shown on the screen: The Gram logo and the unit type "GA 86/GA950" as well as the date and time, are offered on a field with a blue background.
  • Page 15 HOSHIZAKI EUROPE B.V. Language Settings When you touch the dropdown button (red marked), the possible values of languages will display. The desired language can be selected by touching it. It is essential to restart the controls to ensure that this change has been performed for all areas.
  • Page 16 HOSHIZAKI EUROPE B.V. Season Settings Setting of the season, i.e. the setting of winter/summer time is done by pressing on the field under the text "Summer time" Possible choices: "NO" = manual selection of winter time (system time) "YES" = manual selection of summer time (system time + 1 hour) "AUTO"...
  • Page 17 HOSHIZAKI EUROPE B.V. Setting of Ending Times for Programs for Each Weekday In order to consider take weekends or holidays, an ending point in time can be established for programs for each weekday as a default. This is then shown upon later program selection; you only need to confirm it by choosing "morning".
  • Page 18 HOSHIZAKI EUROPE B.V. Selection and Start of a Program To start a preconfigured program without changing the settings, you press the button on the keyboard with the symbol "Master". The selected symbol is shown with a blue edge, and the "Settings" button is shown in blue, which means that it has been activated.
  • Page 19 HOSHIZAKI EUROPE B.V. Changing of further Settings Before Program Start To adjust a preconfigured program, touch the button on the keyboard with the "Master" symbol. The selected symbol is displayed with a blue edge, and the "Settings" button (symbol with sliding button) is shown in blue, which means it has been activated.
  • Page 20 HOSHIZAKI EUROPE B.V. Display During Program Execution Changing a Running Program Touching the program symbol opens the settings menu, where you can change the specifications for program phases that have not been run yet. Touching the field with the ending time for...
  • Page 21 HOSHIZAKI EUROPE B.V. Here, the date can be changed by touching the date fields. Selection of the time can be opened by touching the time window. Here, the time can be entered and saved with "OK". Exit the menu without making changes with "<". The ending time for the...
  • Page 22 HOSHIZAKI EUROPE B.V. Storage of User-Defined Programs We have mentioned how you can adjust a preconfigured program on page 13. Following steps will explain how a user define their own program: When touching the button with the program name, a window with an alphanumeric keyboard is displayed for entry of a special program name.
  • Page 23 HOSHIZAKI EUROPE B.V. IMPORTANT Remember that the preconfigured programs in the bookmarks cannot be themselves! Deletion of a Specially Created Program Select program, blue frame is displayed, after which you continue to press until a new menu item is displayed. You can now select "YES"...
  • Page 24 HOSHIZAKI EUROPE B.V. Alarm Log Alarms are stored in the alarm list To open the alarm list, first push „Settings“ and then push "Alarm". During operation, the alarm list can be accessed by pressing the area of the alarm symbol on the right edge of the photo.
  • Page 25 HOSHIZAKI EUROPE B.V. Info I/O: Switching states and sensor values The current values of the sensors and the switching states of the controller outputs can be displayed in the menu „Info I/O“. To display the „Info I/O“ menu, first push the “Settings”...
  • Page 26 HOSHIZAKI EUROPE B.V. SET: Service parameters The parameters are listed in several pages of the "SET" menu. To display the list, first push the “Settings” button and then the “SET” button. Navigation between pages is done by touching the corresponding tabs at the bottom edge: Touching the white buttons with the entries opens an input window.
  • Page 27 HOSHIZAKI EUROPE B.V. Entering the serviceparameters, level III The change of the service parameters requires the registration to level "III". The input window is reached by pressing the "Service/Settings" button. Touching the input field opens a numerical keypad. The service password is "6500".
  • Page 28 HOSHIZAKI EUROPE B.V. Error message Error Code Description System reaction The temperature around the room sensor has been Alarm high temperature above the alarm value for none longer than the alarm delay time The temperature around the room sensor has been...
  • Page 29 HOSHIZAKI EUROPE B.V. PARAMETER LIST COOLING Dim. Note Minimum compressor on time serv Minimum compressor off time serv Compressor ON->OFF differential - FREEZE, Troom <= SP - C03 ==> 10,0 °K serv STORAGE, RETARD- compressor OFF Compressor OFF->ON differential - Troom >= SP + C04 ==>...
  • Page 30 HOSHIZAKI EUROPE B.V. EVAPORATOR FAN Dim. Note Evaporator fan speed, compressor, heater serv and steamer OFF -FREEZE- Evaporator fan speed, compressor, heater and serv steamer OFF -STORAGE- Evaporator fan speed, compressor, heater serv and steamer OFF -THAW- Evaporator fan speed, compressor, heater...
  • Page 31 HOSHIZAKI EUROPE B.V. STEAMER Dim. Note Humidity control serv Set temperature above which the boiler can be -5,0 15,0 °C serv activated Use external SSR serv 3.5 / Max allowed current in boiler (Imax2) serv Current in boiler to close the water inlet valve 3.5 /...
  • Page 32 HOSHIZAKI EUROPE B.V. SYSTEM Dim. Note Plateau time -THAW- user Plateau time -PROVE- user Starting point acquisition time serv for slope calculation -5,0 Frame heaters setpoint -30,0 30,0 °C serv Frame heaters differential 10,0 °K serv opera No door switch; Normally Open;...
  • Page 33 HOSHIZAKI EUROPE B.V. Item INPUT Dim. Note Adjusting room sensor input -5,0 °K serv Adjusting evaporator sensor input -5,0 °K serv Adjusting condenser 1 sensor input -5,0 °K serv Adjusting Humidity sensor input serv NETWORK Dim. Note IPaddr - 1...

  • Page 34: Switching The Door Hinge Side

    HOSHIZAKI EUROPE B.V. 11) Switching the Door Hinge Side The door hinge side can be changed without additional parts. The hinge brackets are asymmetrical, so you must take special care to not get them mixed up – if in doubt, label them before making the modification.
  • Page 35 HOSHIZAKI EUROPE B.V. The following description applies to the modification from right to left. In the opposite situation, the corresponding procedure is reversed. 1. Remove the fastening screw 2. Fold the canopy upwards and 3. Open the door at an angle...
  • Page 36 HOSHIZAKI EUROPE B.V. 7. Remove the door closer 8. Move the hinges from the 9. Remove the blind plugs for without turning the door closer bottom right to the top left, and this. square. from the top right to the bottom left;...

  • Page 37: Reaching The Evaporator Unit For Service

    HOSHIZAKI EUROPE B.V. 12) Reaching the Evaporator Unit for Service 1-2-3) The inner air sheet plate of the refrigerator cabinet is disassembled by cordless or manual screwdriver and removed carefully. ) To easy work, sheet place can put on the top of the rail.

  • Page 38: Reaching The Refrigerating Unit For Service

    HOSHIZAKI EUROPE B.V. 13) Reaching the Refrigerating Unit for Service 1. Remove the fastening screw in the middle at the 2. Fold the canopy upwards and secure it against bottom edge of the canopy. folding back down using adhesive tape or similar.

  • Page 39: Steam Humidifier System Maintenance

    HOSHIZAKI EUROPE B.V. 14) Steam Humidifier System Maintenance The operating characteristics and maintenance intervals of the steam humidifier are mainly dependent on the exising water quality (total hardness, conductivity) and the amount of steam generated since the last maintenance. Different qualities can lengthen or shorten the period. The residues found in the steam cylinder provide an indication of future maintenance intervals.
  • Page 40 HOSHIZAKI EUROPE B.V.
  • Page 41 HOSHIZAKI EUROPE B.V. Remove all scale and sludge from cylinder. When cleaning do not use acids or other chemicals. Examine the electrode bushings, and clean them if necessary. Be aware that the rubber seal should face the top of the cylinder.
  • Page 42 HOSHIZAKI EUROPE B.V.
  • Page 43 HOSHIZAKI EUROPE B.V. Refit the cylinder cover. Refit the steam pipe. Switch on the unit and operate for 15 to 30 minutes. Check for any leaks. Replacing electrodes Disassemble the cylinder and open as described in chapter "Cleaning the steam cylinder".
  • Page 44 HOSHIZAKI EUROPE B.V. Reassemble the steam cylinder and fit as desribed in the chapter "Cleaning the steam cylinder". Connect plugs to the matching electrodes and level sensor. Connect hoses for water supply and drain. Switch on the unit and operate for 15 to 30 minutes. Check for any leaks.
  • Page 45 HOSHIZAKI EUROPE B.V.
  • Page 46 HOSHIZAKI EUROPE B.V. Remove the water supply hose by loosening the hose clip. Dismount the solenoid valve from the bracket. Disassemble the solenoid valve, and remove filter and reducer. Clean the parts. If necessary, replace the rubber seal. Assemble the solenoid valve with filter and reducer again.

  • Page 47: Measures For Taking The Cabinet Out Of Operation For Long Periods

    Hoshizaki recognizes that our products for the catering market are considered as WEEE when they become obsolete. To ensure that Hoshizaki’s responsibilities are handled correctly and environmentally friendly, we are signed up the largest “Business to Business”...

  • Page 48: Technical Support And Ordering Spare Parts

    OrderSE@hoshizaki.dk Hoshizaki Italia – Italia TEL: +39 348 3022156 commerciale@hoshizaki.it Hoshizaki Europe B.V – All other countries in Europe and Africa TEL: +31 (0)20 691 84 99 sales@hoshizaki.nl -- http://hoshizaki-europe.com/ In the event of faults, please first check if the cabinet is connected to the mains, then check the fault indicator on the display and consult the service manual.

  • Page 49: Technical Data

    R290 Charge 0,149 0,133 Equivalent Heavy-duty; This appliance is intended for use in ambient temperatures up to 40°C HOSHIZAKI EUROPE B.V. Address: Burgemeester Stramanweg 101 1101 AA Contact Details: Amsterdam, The Netherlands Tel.: +31 (0)20 691 84 99 - http://hoshizaki.europe.com...

  • Page 50: Dimensions

    HOSHIZAKI EUROPE B.V. 19) Dimensions DIMENSIONS OF THE DEVICES BAKER GA 950...
  • Page 51 HOSHIZAKI EUROPE B.V. BAKER GA 550...

  • Page 52: Wiring Diagram

    HOSHIZAKI EUROPE B.V. 20) Wiring Diagram...

  • Page 53: Cooling Diagram

    HOSHIZAKI EUROPE B.V. 21) Cooling Diagram...

This manual is also suitable for:

Baker ga 950

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