Accumulator; External Alarm Function; Reasons For Alarm; Defrosting - Electrolux MRF 120/35 Operating Instructions Manual

17
In the electronic part an accumulator is included. Iif there is a of lack of electricity, it carries out the alarm and temperature measu-
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rement functions for a maximum of 22 hours.
This accumulator is charged automatically, as soon as the equipment plug is connected.
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The accumulator should be replaced every three years. The replacement must be carried out only by the Technical Service Centre.
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On the back of the electronic circuit there are two potential-free outlets that can be used to command an external alarm system.
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These outlets are guided to two sockets at the rear of the refrigerator where an external optical or acou-
stical alarm can be connected.
The external alarm function only reports a temperature alarm. An AC-Fail alarm is not indicated.
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The two potential-free outlets are related to a make-contact.
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The connected voltage must not exceed 30V DC. The current is limited to 2A.
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As already previously described two types of alarm can be distinguished: a temperature alarm and the „AC-Fail" alarm.
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The sounding of the AC-fail alarm can happen for the following reasons:
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plug disconnected from the outlet
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outlet without electricity (faulty safety valve, lack of electricity, etc.)
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When there is a temperature alarm, check for the following possible causes:
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Has the door been left open longer than necessary, causing an increase in the internal temperature?
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Have too many hot or cold products been placed in the refrigerator at the same time?
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Have products with packages that have been heated been placed in the refrigerator?
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Has a layer of ice formed on the evaporator plate (at the back inside)? This would mean that the defrosting does not work and
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that the equipment is not able to supply sufficient cooling power.
Is the room temperature too high, that is, over 32°C?
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If the cause of the alarm cannot be immediately eliminated, there is the danger that the products become too hot or too cold. In
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this case it is recommended to empty the refrigerator and put the contents in other equipment.
Check the functioning of the refrigerator after having eliminated all the described causes. Warn the Assistance Service if after a cer-
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tain period of time the temperature values do not go back to normal.
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Excessive frosting-over of the evaporator prevents the appliance's cold chamber from refrigerating and reduces refrigeration capa-
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city. Regular defrosting is therefore essential.
Models MRF400/35 and MRF600/35 are fitted with an automa-
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tic defroster. To ensure optimum defrosting, the built-in defrosting
dial should be set to the present time before commissioning and
after the appliance has been switched off for a long time (over
one hour).
All other appliances should be defrosted manually once a layer of ice over 1 cm thick has formed.
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For defrosting, proceed as follows:
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Re-store products in another appliance. Set the locking switch to the 'OFF' position and, with the door open, wait until the ice has
melted.
After defrosting, the inside of the appliance should be thoroughly cleaned and dried.
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A
CCUMULATOR
E
XTERNAL ALARM FUNCTION
A R
LARM EASONS
D
EFROSTING
- 9 -
2 A
max. 32V DC
actual time