Frequency Day Month Year
Operations 1 7 15 1 3 6 1 2 3
Visual check of the unit and adhesive plates
Visual check for water leakages
Cleaning glasses and acrylic glasses
Cleaning external surfaces (panels, frame, base, bumpers)
Cleaning acrylic glass intake air baffles
Cleaning the display deck
Cleaning the insulated casing (under the display deck)
Cleaning the condenser filter (if any)
Defrost the cabinet completely
Cleaning the condenser
Cleaning the inner side of the casing (evaporator included)
Cleaning the discharge grill inside the casing
Checking the water discharge system
Checking re-evaporation sponges of condensation water
Check the correct positioning of re-evaporation sponges.
Check the electrical system
Check the refrigerating system, functioning and performance
= Ordinary cleaning, operation to be performed by personnel of the store
= Extraordinary maintenance, operation to be performed by qualified personnel
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7.3 Cleaning sliding glasses, front glass and glass shelves. ______________
Use a soft and non-abrasive cloth with neutral de-tergents (pH 6÷8) for cleaning and a soft and dry cloth for drying. Do not use abrasive products or metal scrapers that may scratch the glass. Do not use corrosive deter-gents, thinners, alcohol or solvent swhich can damage the plastic seals and the painted parts of the frame.
Do not use hot water on cold glass as it can break and be dangerous for the operator.
To remove the sliding glass:
• Slightly lift up the upper glass [1] from the side which is not bound by the plastic guide, remove the glass from the slot, paying attention not to drop it.
• Lift up the lower glass [2].
• For refrigerated cabinets without sliding glass, it is possible to extract front glass [3]. Remove the
7.4 Cleaning the acrylic glass parts ______________________________
Use soft microfiber or cotton cloth soaked with lukewarm water (max. 35° C). If there are halos, add some neutral diluted detergent (pH 6÷8). Rinse and dry with a soft and dry cloth. Use a specific product for the stainless steel display deck. Do not use corrosive deter-gents, thinners, alcohol or solvents.
For cleaning completely the acrylic glass parts:
• Remove the anti-demisting acrylic glass [1], if any, by unhooking the front part of air outlet baffle. After that, the anti-demisting acrylic glass returns to its original flat shape. It shall be curved when it is re-positioned.
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• Remove the air outlet baffle [2].
• Extract the central assy air intake baffle [3] togeth-er with the top canopy [4].
• Clean the removed components and the side-walls [5].
• Follow the operations in the reverse order to reas-semble the components.
7.5 Cleaning the internal bottom surface of the casing ________________
Use soft microfiber or cotton cloth soaked with lukewarm water (max. 35° C). If there are halos, add some neutral diluted detergent (pH 6÷8). Rinse and dry with a soft and dry cloth. Use a specific product for the stainless steel display deck. Do not use corrosive deter-gents, thinners, alcohol or solvents.
Do not use hoses connected to the water system to wash the unit. Do not use direct or indirect water jets or machines for pressure cleaning (i.e. high pressure washers).
• Remove the display decks [1] then the sheet under the display deck [3] by using the supplied tool [2].
• Vacuum any residue in the carcass.
• Clean the air grills [4], the evaporator cover [5], the fan holders [6] and the insulated casing [7], paying attention not to wet the electrical parts.
• Follow the operations in the reverse order to reas-semble the components.
7.6 Cleaning the condenser ____________________________________
Use a brush with hard bristles and a vacuum cleaner.
The aluminium fins of the condenser can cause injuries to the hands and arms; use protective gloves for cleaning these parts.
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• Unscrew the side knobs [1].
• Slightly rotate the panel [2], lift it up to remove it from the slots in the upper parts of the frame. Re-move the panel.
• Use a brush with hard bristles and a vacuum cleaner, clean the dust and any other dirt residue in the aluminium fins of the condenser [3].
• Follow the operations in the reverse order to reas-semble the components.
7.7 Cleaning condenser with removable filter _______________________
The aluminium fins of the condenser can cause injuries to hands and arms, use protective gloves for cleaning these parts.
For the filter removal, perform the following steps:
• Open the panel [1] by inserting the supplied tool [2]
into the hole on the upper front side of the panel.
• Remove the filter [3] from the guides on the panel [1].
• Use a vacuum cleaner to remove dust or any other dirt in the filter [3].
• Wash the filter [3] with running water and dry with soft cloth.
• Remove dust between the condenser fins [4], giv-en in the previous section.
• Follow the operations in the reverse order to reas-semble the parts.
• Close the panel which is locked by magnets.
3
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8. Dixell XR77CX control panel
8.1 Description _______________________________________________
The following instructions refer to a refrigerated cabinet with built-in condensing unit and DIXELL mod. XR77CX elec-tronic controller.
This microprocessor based controller is equipped with an LED display designed for the management of refrigerating units, display cabinets and showcases. The LED display contains 3 digits and a decimal point for reading both temper-atures and parameter codes easily. The display contains a set of luminous icons that intuitively represent the status of the unit. The controller is equipped with a 6-button keypad which activates/deactivates the main functions and stores/
modifies the working parameters.
8.2 Switch the unit on and off
To switch on the refrigerated cabinet and enable its functions, turn on the main magnetothermal switch from the con-trol panel. When the unit is on, the display will show all icons and the 3-digit panel for few seconds. To switch off the unit, move the lever to “OFF”.
Attention: In some models, the compressor starts a few minutes after the unit is switched on.
8.3 Normal conditions of operation ________________________________
When the refrigerated cabinet is switched on, the controller will automatically manage the functioning of the condens-ing unit to reach and keep the SET-POINT temperature. The set-point temperature is set at the factory as an average value but it might be necessary to change this value to make the temperature more suitable to displayed products (please refer to the information given in the product label). For the modification of the set point, refer to the following chapter of this manual.
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8. Dixell XR77CX control panel
Attention: The cabinet is equipped with a digital thermometer positioned inside the display area, usually close to the front glass. The displayed temperature corresponds to the temperature in the refrigerated cabinet; there-fore refer to this value for preserving the goods properly. The temperature displayed by the controller corre-sponds to the set point value. For technical reasons, the temperature values provided by the two displays (i.e. ther-mometer in the refrigerated cabinet and controller display), even if related to one another, could be different and vary during the cabinet’s operation. This fact is not an anomaly or a technical fault. To modify the working temperature, it is necessary to consider the temperature displayed by the digital thermometer inside the refrigerated cabinet, and then increase/decrease to the set point value memorized by the controller.
8.4 User interface
To switch on and off the lighting (if any) To start manual defrostTo display or modify the set point
UP arrow— to increase the set point value DOWN arrow— to decrease the set point value Stand-by of the cabinet (function disabled)
LED MODE
Compressor in waiting mode (delayed start) Defrost in progress
Dripping phase in progress Temperature alarm
Continuous cycle running
°C ON Measurement unit of temperature
°C Flashing Programming phase (for maintenance technicians only)
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8. Dixell XR77CX control panel
8.5 Set-Point (working temperature)
The electronic controller automatically manages the working temperature inside the cabinet, according to the set value, as well as the defrost cycles.
How to display the current set point
To display the current set point value, push and release the SET key. To display the sensor value again, push and release the SET key or wait 10 seconds for the automatic reset of the display.
How to change the current set point:
• Push the SET key for more than 2 seconds
• The value of the set point will be displayed and the “°C” symbol starts blinking
• To change the set value, push the UP or DOWN arrows within 10 seconds
• To memorize the new set point value, push the SET key or wait for 10 seconds
8.6 Defrosting
The controller is programmed at the factory to perform a given number of defrost cycles in 24 hours. The du-ration of defrost cycles can vary, and it depends on the temperature detected by a specific sensor positioned inside the evaporator (defrost sensor). This sensor enables the end of the defrost, unless the maximum safety duration time (i.e. time-out) is reached.
Manual defrosting
If it is necessary to activate a manual defrosting cycle, push the indicated key for more than 2 seconds. The defrost cycle will take place according to the criteria mentioned above (once it has reached the end defrost temperature de-tected by the defrost sensor or the time-out). The display will show the “DEF” (defrost).
8.7 Lights, switching on/off
If installed, the optional LED lighting is operated by the keyboard of the electronic controller, by pressing the AUX key.
The “Switch-On status” is also confirmed by the message “AUX” on the display and memorized by the controller itself.
This status remains stored and active also in the case of unintentional switching-off of the cabinet or temporary black-out. At the restart of the unit, or once the power has been restored after a blackout, the lighting system will be auto-matically powered.
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8. Dixell XR77CX control panel
8.8 Alarm warnings
In case of an anomaly, the microprocessor will activate an alarm and the display will show the corresponding warning codes which identify the cause. All alarm warnings will automatically stop as soon as the normal conditions of opera-tions are restored.
Warnings “P1” - ”P2” - ”P3” - “P4”
Call Technical Support and have the technicians check the probe connections and replace them if it is necessary. If the probe is broken, the refrigerated cabinet might not be able to maintain the proper temperature suitable for preserv-ing the displayed products. Check the temperature with the digital thermometer in the refrigerated cabinet. Remove the products and store them in a suitable refrigerated place (i.e. cold-rooms, another refrigerated cabinet) if it is neces-sary.
Warning “HA”
This warning indicates a high temperature for preserving the displayed products. Check the temperature with the digi-tal thermometer (it is inside the refrigerated cabinet) and the loading conditions of the displayed products (refer to Chapter 6 “Loading and using the cabinet). Remove the products and store them in an suitable refrigerated place (i.e.
cold-rooms, another refrigerated cabinet) if it is necessary
Warning “HA2”
If the refrigerated cabinet is equipped with the “SCE” (efficient condenser system), there is an additional probe for the measurements of the condensation temperature. The warning indicates a reduced efficiency of the unit caused by the accumulation of dirt on the front surface of the condenser. Clean the condenser as described chapter “7 User’s maintenance”. If the warning remains, even after the cleaning operation, call for Technical Support.
A dirty condenser causes higher energy consumption and stresses the compressor resulting in a decrease of duration of the compressor. Check the condenser periodically and clean it as given in the Scheduled maintenance calendar in chapter “7 User’s Maintenance”.
This type of warning, in addition to the normal displayed messages, activates an intermittent sound signal. All alarm warnings will automatically stop as soon as the normal conditions are restored (i.e. clean condenser).
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8. Dixell XR77CX control panel
8.9 Programming the controller
Attention! This section of the manual is meant for maintenance technicians only.
Access to the programming menus and the modification of the parameters are exclusively reserved for installa-tion and maintenance personnel. Incorrect or improper modificainstalla-tions of the parameters can cause malfuncinstalla-tions and/or a poor performance of the unit.
Parameter categories and access to the menus
Working parameters are grouped in two different categories:
Type “PR1” parameter: parameters of 1st level, related to the normal operating conditions.
Type “PR2” parameter: parameters of 2nd level, related to the system configuration.
Access and setting type “PR1” parameters
• Enter the programming mode by pressing the SET + DOWN ARROW for 3 seconds. The “°C” LED starts blink-ing.
• Select the required parameters by scrolling the Pr1 parameter list using ARROWS (UP/DOWN).
• Press the SET key to display the parameter value.
• Use the ARROWS (UP/DOWN) to change the parameter value.
• To exit the programming mode, press SET + UP ARROW, or wait for 15 second without pressing any keys to save automatically the new value.
Access and setting type “PR2” parameters
• Enter the programming mode by pressing the SET + DOWN ARROW for 3 seconds. The “°C” LED starts blink-ing.
• When the first parameter is displayed, release the keys, then push them again for more than 7 seconds. The
“PR2” message will be displayed immediately followed by the “Hy” parameter. The complete list of parameters (“PR1” and “PR2”) is now accessible and modifiable.
• Select the required parameter, scrolling through the list with the ARROW (UP/DOWN), and press the SET key to display the value.
• Use the ARROW (UP/DOWN) keys to change the parameter value.
• To exit the programming mode, press SET + ARROW UP, or wait for 15 seconds without pressing any keys to automatically save the new value.
In case of a power black-out before saving the new value, the change won’t be saved.
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9.1 Description _______________________________________________
The following use instructions refer to the cabinet case with built-in condensing unit which has a control panel equipped with an electronic controller WURM model CRA.
This microprocessor based controller is equipped with an LED display designed for the management of refrigerating units, display cabinets and showcases. The LED display contains 3 digits and a decimal point for reading both temper-atures and parameter codes easily. The display contains a set of luminous icons that intuitively represent the status of the unit. The controller is equipped with a 4-button keypad which activates/deactivates the main functions and stores/
modifies the working parameters. The main isolator switch switches the unit off and on.
9.2 Switch the unit off and on__________________________________________
To switch on the cabinet and enable its functions, turn on the main magnetothermal switch. When it is switched on, the controller LED display will light up. To switch the unit off, move the lever to “OFF”.
Attention: In some models, the compressor starts a few minutes after the unit is switched on.
9.3 Normal conditions of operation____________________________________
When the refrigerated cabinet is switched on, the controller will automatically manage the functioning of the condens-ing unit to reach and keep the SET-POINT temperature. The set-point temperature is set at the factory as an average value but it might be necessary to change this value to make the temperature more suitable to displayed products (please refer to the information given in the product label). For the modification of the set point, refer to the following chapter of this manual.