LIEBHEER
LGT Series MediLine Chest Freezer Operating Instructions
Operating Instructions
14 Pages
Preview
Page 1
Übersetzung
Operating instructions
Chest freezer Read the operating instructions before switching on for the first time
Page 14
EN
7083 180-00 LGT
Disposal notes
The appliance contains reusable materials and should be disposed of properly - not simply with unsorted household refuse. Appliances which are no longer needed must be disposed of in a professional and appropriate way, in accordance with the current local regulations and laws. When disposing of the appliance, ensure that the refrigerant circuit is not damaged to prevent uncontrolled escape of the refrigerant it contains (data on type plate) and oil. • Disable the appliance. • Pull out the mains plug. • Cut through the connection cable.
Other features
- Audible and visual temperature alarm (adjustable limits). - Audible and visual alarm if the lid is left open for too long. - Floating contact for connection to a remote monitoring system. - Serial interface (RS485) for external temperature and alarm documentation. - Maximum/minimum interior temperatures are stored. - Last 3 temperature alarms are saved with time, date and duration of alarm. - Last 3 power cuts are saved with time, date and duration of power cut.
WARNING
Danger of suffocation due to packing material and plastic film! Do not allow children to play with packaging material.
Take the packaging material to an official collection point.
- Opening for installing a reference sensor. It is essential to use these safety facilities to avoid damage to stored items. These facilities must not be deactivated or decommissioned! The appliance complies with the relevant safety regulations and EU Directives 2014/30/EU and 2014/35/EU.
Description of the appliance
Interior light (LED lamp)
Operating and control elements
Type plate Opening for external temperature sensor
Lock
Compressor compartment ventilation grille
The lock is equipped with a safety mechanism.
Locking the appliance 1 Press the button and keep it depressed. 2 Turn the key 90°.
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Defrost drain
Safety instructions and warnings
• To prevent injury or damage to the unit, the appliance should be unpacked and set up by two people.
• In the event that the appliance is damaged on delivery, contact the supplier immediately before connecting to the mains. • To guarantee safe operation, ensure that the appliance is set up and connected as described in these operating instructions. • Disconnect the appliance from the mains if any fault occurs. Pull out the plug, switch off or remove the fuse.
• When disconnecting the appliance, pull on the plug, not on the cable.
• Any repairs and work on the appliance should only be carried out by the customer service department, as unauthorised work could prove highly dangerous for the user. The same applies to changing the mains power cable.
• Do not allow naked flames or ignition sources to enter the appliance. When transporting and cleaning the appliance, ensure that the refrigerant circuit is not damaged. In the event of damage, make sure that there are no ignition sources nearby and keep the room well ventilated.
• This appliance can be used by children of 8 years old and over, and also by persons with restricted physical, sensory or mental capacity or lack of experience and knowledge, if they are supervised or have been instructed on safe use of the appliance and understand the resulting risks. Children must not be allowed to play with the appliance. Cleaning and user maintenance must not be carried out by children without supervision.
EN • Do not store explosives or sprays using combustible propellants such as butane, propane, pentane, etc. in the appliance. Electrical components might cause leaking gas to ignite. You may identify such sprays by the printed contents or a flame symbol. • Do not use electrical appliances inside the appliance.
• If you have a lockable appliance, do not keep the key near the appliance or within reach of children. • The appliance is designed for use in enclosed areas. Do not operate the appliance outdoors or in areas where it is exposed to splash water or damp conditions.
• The LED lamp is designed to illuminate the interior of the appliance. It is not suitable for lighting a room.
• Do not install the appliance in the immediate vicinity of an air-conditioning unit. The appliance should also not be operated under a wallmounted air-conditioning unit.
• In special fields of application which are subject to their own standards or local regulations, the user is responsible for complying with these requirements. Such requirements could be: - Standards for storing drugs or blood/blood plasma - Local pharmaceutical laws etc.
• Avoid prolonged skin contact with cold surfaces or chilled/frozen food. This could cause pain, numbness and frostbite. In the case of prolonged skin contact, protective measures should be taken, e.g. gloves should be worn.
• Do not consume food which has been stored for too long, as it could cause food poisoning.
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Range of appliance use
The appliance is suitable for storing and cooling of laboratory preparations at temperatures of between -10°C and -45°C. The appliance is not suitable for use in explosion-hazard areas.
For the storage of valuable or temperature-sensitive substances or products the use of an independent, constantly monitoring alarm system is necessary. This alarm system must be designed so that each alarm status is detected immediately by an authorised person who can then take appropriate action. Position the temperature sensor for this system in the upper part of the interior container (see Opening for external temperature sensor).
Climate rating
The climate rating indicates the room temperature at which the appliance may be operated in order to achieve full refrigeration performance. The position of the type plate is shown in the section entitled Description of the appliance.
SN N ST T SN-ST SN-T
• The floor on which the appliance stands must be horizontal and level. Place the appliance far enough away from the wall so that the lid can be opened and closed unhindered.
1 Do not cover the gap be-
tween the lower edge of the freezer and the floor, as the refrigeration unit has to be supplied with air for cooling.
2 There must be a gap of
at least 20 cm between the ventilation grille and the wall. This gap must be kept clear and the ventilation openings uncovered.
3 Do not place any objects immediately next to
The climate rating is indicated on the type plate.
Climate rating
Setting up
• Avoid positioning the appliance in direct sunlight or near cookers, radiators and similar sources of heat.
Room temperature +10°C to +32°C +16°C to +32°C +16°C to +38°C +16°C to +43°C +10°C to +38°C +10°C to +43°C
Do not operate the appliance outside the specified room temperature range.
the outer housing of the appliance. There must be a gap of at least 20 mm all round in order to ensure adequate heat discharge.
• Standard EN 378 specifies that the room in which you install your appliance must have a volume of 1 m3 per 8 g of R 290 refrigerant used in the appliance, so as to avoid the formation of inflammable gas/air mixtures in the room where the appliance is located in the event of a leak in the refrigerant circuit. The quantity of refrigerant used in your appliance is indicated on the type plate.
Electrical connection
Only operate the appliance with alternating current (AC). The permissible voltage and frequency are indicated on the type plate. The position of the type plate is shown in the section entitled Description of the appliance.
Appliance dimensions (mm)
The socket must be properly earthed and protected by a fuse. The tripping current of the fuse must be between 10 A and 16 A.
The socket must not be situated behind the appliance and must be easily accessible. LGT 2325 LGT 3725 LGT 4725
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A
1138 1378 1653
B
740 789 789
Do not connect the appliance using an extension cable or extension socket. Do not use stand-alone inverters (conversion of direct current to alternating/three-phase current) or energy-saving plugs. Risk of damage to the electronic control system!
EN
Setting the temperature
Operating and control elements
1 Temperature display 2 Button for calling up stored alarm events 3 ON/OFF button (to switch the appliance on and off) 4 Audible warning on/off button 5 Selection buttons 6 Set button (Enter)
• Press button
for 1 second. The temperature display flashes.
• To increase the temperature (warmer): press button • To reduce the temperature (colder): press button • Press button
. .
again.
The desired temperature setting is saved.
Audible warning signal The audible warning signal will sound in certain alarm events.
Control elements
Compressor is running LED flashing - refrigeration unit switches on after a delay. The compressor will start automatically after the pressure in the refrigerant circuit has equalised. )
AUX Temperature display via product sensor is activated
It can be cancelled by pressing button
Lid open alarm
When the lid is opened, the LED display begins to flash.
Alarm function If appears in the display, the appliance has a fault. Consult your nearest customer service point. HACCP (Hazard Analysis Critical Control Point)
The HACCP display means that the power supply and interior temperature of the appliance are recorded. If HACCP flashes in the display, there has either been a power failure or the temperature in the appliance exceeded the permissible range.
Switching the appliance on and off
Connect the appliance to the mains - the display reads OFF. Switching the appliance on: Keep the ON/OFF button pressed for approx. 5 seconds - the display reads ON.
.
lights up and the temperature
When the lid has been left open for more than 60 seconds, the LED begins to flash, and and the temperature indication flash alternately in the display. The audible warning signal sounds (unless the audible warning signal function has been deactivated). If the lid has to stay open for longer in order to insert items to be cooled, cancel the audible warning signal by pressing button . If the lid is open, the audible warning signal can also be muted by pressing the contact switch on the electronics housing. This will disable the audible warning signal for 60 seconds.
No alarm is displayed or sounded when the appliance is switched on for the first time.
If the appliance is disconnected from the mains for a long time after it has been switched on for the first time and if the temperature inside the appliance rises above the upper alarm limit, this will be detected as a fault by the electronic control system (HACCP appears in the display).
When the appliance is switched on again, this display must be reset as shown below. Press button Press
+
. for 5 seconds. The display will read
.
The HACCP LED will now light up permanently. Press
for 5 seconds.
The electronic control system will switch back to normal operating mode. Switching the appliance off: Keep the ON/OFF button pressed for approx. 5 seconds - the display reads OFF.
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Setting the delay time for the lid open alarm The time before the audible warning signal sounds after the lid has been opened can be adjusted. Press
for 5 seconds. Display = Display =
Audible warning signal settings
The audible warning signal will be muted for the current alarm after the button has been pressed. Complete the following steps if you want the audible warning signal to reactivate automatically. Press
Display =
Display =
Display =
Display =
Display =
Display =
Display =
Display = (minute)
Display =
Setting range = 1 - 5 minutes Use buttons
and
Display =
to select the desired setting.
Display =
Display =
Display =
for 5 seconds.
Press
for 5 seconds. Display =
The electronic control system will switch back to normal operating mode.
Automatic reactivation of the audible warning signal is now active. The time before the audible warning signal sounds again must be set. Display =
Deactivating the audible warning signal function
Display =
In this case, the sentence stated in these operating instructions "The audible warning signal sounds" must be skipped when reading the section in question.
Press
for 5 seconds. Display = Display =
Display = and
to select the desired setting.
= audible warning signal function activated = audible warning signal function deactivated Display = Press
for 5 seconds.
The electronic control system will switch back to normal operating mode.
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has been pressed. Setting
range = 1 - 120 minutes. Use buttons
and
to select the desired setting.
Display = Press
for 5 seconds.
The electronic control system will switch back to normal operating mode.
Display =
Use buttons
warning signal will sound again after the button
The audible warning signal function can be completely deactivated if necessary.
Note
Time in minutes after which the audible
Alarm messages 1. LED
Adjusting the alarm parameters
flashes
appears in the display, the appliance has a fault. Consult If your nearest customer service point. 2. LED
The alarm limits (difference to the set temperature) and the alarm delay (delay until alarm goes on) can be adjusted. Press
flashes, the display reads HI or LO
Display =
The audible warning signal sounds (unless the audible warning signal function has been deactivated).
Display =
Note The alarm parameters can be adjusted. See Adjusting the alarm parameters.
Display =
3. HA/HF/HACCP flashes
Display =
There has been a power cut (HF) of some length or the interior was too warm or too cold (HA) during a certain period of time. Up to three alarm events can be stored and called up.
Display = Display =
for 5 seconds.
• The display will change to a temperature value of 0.2°C below the set upper alarm limit. • The temperature value will now rise by 0.1°C every 2 seconds. will appear in the
display. An external alarm unit connected to the floating alarm output will now be activated.
Use buttons
Display = Display =
will be lit during the test.
Display = alarm delay in minutes Use buttons
Cancelling the test prematurely Press
and
to select the desired setting.
Display =
for 5 seconds.
Note If the values of the upper and lower alarm limit (AL and AH in the section entitled "Adjusting the alarm parameters") are set to 0, and will appear in the display during this test.
to select the desired setting.
Set positive values only.
will appear in the display.
The electronic control system will automatically switch back to normal operating mode.
and
Important note
• The same process will take place automatically for the lower The LED
Upper alarm limit
Display = temperature difference in °C
• The temperature value will continue to rise up to 0.2°C above the upper alarm limit. alarm limit.
to select the desired setting.
Set positive values only.
Activating the test
• When the upper alarm limit is reached,
and
Important note
The appliance does not stop its refrigerating function during this test.
+
Lower alarm limit
Display = temperature difference in °C Use buttons
This test checks the function of the internal and any external connected alarm device.
Press
for 5 seconds. Display = Display =
The interior is too warm (HI) or too cold (LO).
Alarm test
EN
Press
for 5 seconds.
The electronic control system will switch back to normal operating mode.
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Calling up stored alarm events and reading the temperature progression
Example of an alarm query Situation: HA/HF/HACCP flashes in the display.
Display =
Display =
Scroll through the list using
or
.
Display =
Number of temperature alarms Last temperature alarm
Display =
Last temperature alarm but one Temperature alarm before
Press this button until
Number of power cuts
Display =
Last power cut Last power cut but one Period in hours in which the maximum and minimum interior temperatures were measured
Maximum (highest) measured temperature Lowest measured temperature button. Press this button
again to return to the list. Note: You can exit the menu at any time by pressing seconds.
for 5
If no button is pressed within 60 seconds, the electronic control system switches back automatically.
Resetting the recorded temperature progression
Complete the following steps if you wish to reset the value saved for in the previous section to 0.
or
Display = Press
until
appears in the display.
-
for 5 seconds. Display =
.
The values for and (highest and lowest measured interior temperature) are then reset to the current interior temperature. Press
for 5 seconds.
The electronic control system will switch back to normal operating mode.
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1 power failure has occurred.
Press
Display =
Last power failure.
Display =
Year 2018
Display =
Month 05 (May)
Display =
Day 30
Display =
Hour 23
Display =
Minute 14
Display =
The power failure lasted 3 hours.
+
for 5 seconds. The display will read
.
The HACCP LED will now light up permanently. HA/HF is cancelled in the display. The electronic control system is now ready for the next alarm.
Display = Press the button
appears in the display.
Display =
Power cut before
Select the required item using the
There has not been an alarm status with a too high or too low temperature. You . must switch to display
Press
for 5 seconds.
The electronic control system will switch back to normal operating mode.
Calibrating the control sensor (standard sensor for
temperature control)
Possible tolerances of the control sensor (the displayed temperature compared to the actual interior temperature) can be offset with this function. for 5 seconds. Display =
Press
Calibrating the product sensor
Possible tolerances of the product sensor (the displayed temperature compared to the actual interior temperature) can be offset with this function.
Display = Display =
Display =
Display =
Display = correction value set at the factory or
in 0.1°C increments.
to increase or decrease the correction value
Display = actual (corrected) interior temperature Display = Press
for 5 seconds.
The electronic control system will switch back to normal operating mode.
Product sensor (available accessory)
The temperature may be measured or recorded at any point in the interior using the product sensor.
Display = Use buttons
Press
Press
for 5 seconds.
for 5 seconds.
Switching the temperature display between control sensor and product sensor Press
for 5 seconds. Display = Display =
(control sensor)
Display =
(product sensor)
If the product sensor is activated, AUX appears in the display. Display =
Display = Display =
to increase or decrease the correction value
The electronic control system will switch back to normal operating mode.
for 5 seconds. Display =
Display =
.
Display = actual (corrected) product sensor temperature
Activating the sensor
Display =
or
in 0.1°C increments.
• Connect sensor (see section entitled External alarm)
Press
for 5 seconds. Display =
Press
Display =
Use buttons
EN
Press
for 5 seconds.
The electronic control system will switch back to normal operating mode.
The electronic control system will switch back to normal operating mode. If appears in the display, the product sensor has not been activated. If appears in the display, the product sensor has not been connected, or is faulty.
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Changing the network address
When connecting several appliances via the RS485 interface, each appliance must have its own network address.
The real time clock is preset (CET). Other time zones or summer/ winter time must be adjusted manually. Press
for 5 seconds. Display =
Press
Setting the real time clock
Display =
Display =
Display =
Display =
Display = Display = Use buttons
or
to change the network address ( -
).
for 5 seconds.
The electronic control system will switch back to normal operating mode.
Resetting the parameters to factory settings
The alarm limits and sensor calibration values can be reset to the factory settings using this function.
Set the year by pressing the buttons.
Display = Display =
Month (1-12) Set the month by pressing the buttons.
= save new setting Display =
Day (1-31)
Display =
Set the day by pressing the
buttons.
= save new setting
Pull out the mains plug. Keep
Display =
Year 2018
= save new setting
Display = Press
for 5 seconds. Display =
Display =
Days of the week (1 = Monday, 7 = Sunday)
Display =
Set the day of the week by pressing the buttons.
pressed and connect the mains plug.
Display =
= save new setting
Display = The electronic control system will automatically switch back to normal operating mode.
Display = Display =
Hour (0-23) Set the hour by pressing the buttons.
= save new setting Display = Display =
Minute (0-59) Set the minutes by pressing the buttons.
= save new setting Press
for 5 seconds.
The electronic control system will switch back to normal operating mode.
Note
When
be reset.
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appears in the display, the real time clock must
Interior LED light
An LED lamp is fitted as standard to illuminate the interior of the appliance.
Defrosting
After the appliance has been in operation for some time, a layer of frost or ice will form on the inside walls. This increases energy consumption.
The interior light switches on automatically when the lid is opened and switches off again when it is closed.
• Pull out the plug or switch off the fuse.
The light intensity of the LED light corresponds to laser class 1/1M.
• Transfer items to other appliances.
Important If the cover is removed, do not look directly at the light through optical lenses from close distance. This can damage your eyes.
Replacing the lamp
If the lamp is defective, it can be replaced taking into account the following points. 1. Pull out the plug or switch off the fuse. 2. Remove the cover panel in the direction of the arrow.
Only original LED lamps from the appliance manufacturer may be used. The lamp can be purchased from the customer service department or specialist dealers.
WARNING! When using LED lamps made by other manufacturers, there is a risk of overheating or fire.
EN
• Remove the plug from the drain opening. • To collect the thawed water, place a flat container below the appliance. • Leave the lid open while defrosting. After defrosting mop up the remaining water and clean the appliance.
Do not use any mechanical devices or other artificial aids for defrosting other than those recommended by the manufacturer.
Cleaning
Before cleaning always switch off the appliance. Disconnect from the mains or switch off or unscrew the fuse. • Clean the inside, equipment and outer walls with lukewarm water and a little detergent. Do not use abrasive or acid cleaners or chemical solvents.
Do not use steam cleaners because of the risk of injury and damage. • Ensure that no cleaning water penetrates into the electrical components or ventilation grille.
StopFrost system
This system reduces the formation of frost or ice so that the appliance needs defrosting less frequently. The formation of frost or ice depends on the operating and ambient conditions.
• Dry all parts well with a cloth. • The ventilation grilles should be cleaned regularly. Dust deposits increase energy consumption. Ensure that none of the wires or other components are dislodged, bent or damaged. • Do not damage the type plate on the exterior housing of the appliance during cleaning.
Important note
To ensure correct functioning, the opening of the StopFrost system at the back of the lid must not be closed.
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Malfunctions
You may be able to rectify the following faults by checking the possible causes yourself: • Appliance does not function: – Is the appliance switched on? – Is the plug correctly fitted in the mains socket? – Is the fuse intact? • Loud running noise: – Is the appliance set up firmly on the floor? – Does the appliance cause nearby items of furniture or objects to vibrate? Please note that noises caused by the refrigerant circuit cannot be avoided.
External alarm
We recommend connecting the appliance to an external alarm device.
There are various connection options at the back of the appliance.
The appliance may only be connected to an external alarm device by trained personnel.
• The temperature is not low enough: – Is the temperature setting correct (see "Setting the temperature")? – Does the separately installed thermometer show the correct reading? – Is the ventilation system working properly? – Is the appliance set up too close to a heat source?
Floating alarm output
• appears in the display: – Reset the real time clock (see "Setting the real time clock"). If none of the above causes apply and you cannot rectify the fault yourself, contact the nearest customer service department stating the type designation 1, service number 2and appliance number 3 as indicated on the type plate. The position of the type plate is shown in the section entitled Description of the appliance.
Shutting your appliance down
If your appliance is to be shut down for any length of time, switch it off and disconnect the plug or switch off or unscrew the fuse. Clean the appliance and leave the lid open in order to prevent unpleasant smells.
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Connection to RS485 interface
Optional temperature sensor connection
Terminating resistor When connecting several appliances via the RS485 interface, the terminating resistor must remain on the last appliance. Remove the terminating resistors from the appliances in between.
Note The connectors are secured with screws. To remove the connectors, undo the left and right screws.
Floating alarm output
Opening for external temperature sensor
The connection is designed for a maximum of 42 V/8 A DC from a safety extra-low voltage (SELV) source (minimum current: 150 mA).
The sensor cable opening is located on the back of the appliance.
These three contacts can be used to connect the appliance to an optical or acoustic alarm device.
Important
When supplying mains voltage to the floating alarm contact, the technical safety requirements of standard EN 60335 will not be satisfied.
N.O
Alarm output Connection for a visual warning light or an acoustic alarm signal.
N.C
EN
• Remove the foam seals from the sensor cable opening. • Thread the sensor cable through the opening to the inside. • Connect the sensor cable to the appropriate connector.
The position of the connector is shown in the section entitled External alarm > Optional temperature sensor connection.
Operating light Connection for a control lamp to indicate that the appliance is in normal mode.
COM
External power supply unit 42 V/8 A DC maximum Minimum current: 150 mA
• Place the foam seal over the cable, close it and place it in the opening. • Complete the same process on the inside of the appliance with the second foam seal.
RS485 interface Rx- / Tx-
Send/Receive data cable (negative pole)
Important! Finally, seal the sensor cable opening on the exterior using the grey sealant provided since otherwise icing may occur in this area.
Rx+ / Tx+
Send/Receive data cable (positive pole)
GND
Earth cable
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