Defrost - Hotpoint HM31AAE Service Information

Indesit Company
DEFROST PROCEDURE
Start of the Defrost Cycle Depends from:
• Duration of last defrost.
• Time of fridge door opening (every 5 cumulative minutes of door open time reduces the start of the
next defrost cycle by one hour).
• Compressor ON time (minimum is 9 hours).
• Actual time between 2 defrost cycles could be in the range ([minimum 10 hours / maximum 30 hours
(48 hours only if the product is in EC Mode)] > (Consumption Test conditions: ECO Mode + Door
Closed for at least 14 hours + last Compressor ON at least 3 hours ago).
Defrost Cycles can be activated by some particular circumstances:
• In the event of Alarms 'A1' and 'A2', a defrost cycle is carried out every 2 hours.
• If the Door Open Alarm remains active for more than 30 minutes, a defrost cycle will be performed
every 2 hours until the door is closed (Alarm Reset).
• In the event of activation of the Super Freezer Function, if at least 3 cumulative hours of
Compressor ON have passed since the last defrost cycle.
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ON
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OFF OFF
Description
• (A) - All loads are disabled and the defrost heating elements are switch on.
• (B) - The heating elements switch off when the freezer evaporator probe reaches +17°C or after
50 minutes (Defrost Time Out). When the product is in Power Consumption, the threshold of the
freezer evaporator probe to exit by this step is +1°C.
• (C) - As soon as the heating elements switch off, the freezer fan is activated for 5 seconds in order
to deliver warm air to the cold air inlet pipe from the freezer compartment into the fridge
compartment. Everything else remains switched off during this time.
• (D) - All the loads remain disabled for around 12 minutes to allow the water to flow into the
compressor drawer.
• (E) - The compressor is switched on to cool the coil that has heated up during defrosting until the
Freeze Evaporator probe reaches -5°C, than for fixed time of 15 minutes the Freeze Fan is
switched ON with the compressor.
Service Manual UK
(A)
Heating elements
Freezer fan
(C)
(B)
Compressor
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(E)
(D)
English