Electrolux REFRIGERATION User Manual

- ITZAA 20/31 599 38 97-89
6.3 Defrosting
All the humidity in the compartment accumulates on the evaporator, which is the coldest part of the compart-
ment; periodically, about every 14 hours with normal door opening (up to 72 hours if the doors never open!), it
is then necessary to defrost the ice on the battery.
The defrosting starts after the compressor cut-out or if the compressor is on after 2,5 hours max.
The electronic board disconnects immediately the circuit that powers the compressor and the fan, waits 3 min-
utes and then it powers the circuit of the defrosting heater for a minimum time of about 20 minutes.
The heat generated by the defrosting heater does not affect the freezer compartment temperature or the food
packages temperature, because the thermal energy is consumed in the defrosting process of the evaporator
ice.
After 20 minutes, the electronic board checks the state of the thermal switch of the end of defrosting every
minute to detect the cut-out.
When the switch of the end of defrosting cuts out, the electronic PCB stops the defrosting procedure and the
compressor as well as the fan do not operate until 60 minutes from the beginning of the defrosting cycle have
elapsed.
If for any reason, the defrosting cut-out switch does not switch on and the battery temperature rises up to 40
°C, the defrosting heater will be switched off by the safety thermal switch.
If 1 hour after the starting of the defrosting, the thermal switches did not cut out, the electronic board switches
the defrosting heater off in any case and continues its operation.
The electronic PCB activates the compressor and the fan only 60 minutes after the beginning of the defrosting
procedure

Electrolux REFRIGERATION Specifications

General

Brand	Electrolux
Model	REFRIGERATION
Category	Refrigerator
Language	English

Summary

Introduction to Combi Top Refrigerators

Air Circulation System

Refrigeration Circuit Diagram and Components

Electrical Wiring Diagrams and Connections

Appliance Components Overview

Air Box Controls and ERF550 Electronic Board

Details air box controls (temperature, LEDs, door) and the ERF550 electronic board.

Cooler Compartment Components

Identifies key components within the cooler compartment, including the air box.

Air Box Components Details

Details the cooler temperature sensor and the air box contents like fan and door switch.

Air Box Fan and Cooler Door Switch Operation

Explains the air box fan's characteristics and the cooler door switch function.

Freezer Compartment Components

Details components of the freezer compartment, including cold module fan, heater, and evaporator.

Freezer Fan, Heater, and Thermal Switches

Explains freezer fan, defrosting heater, and thermal switches, including their specifications.

Compressor Compartment and Connectors

Identifies the compressor, connector box, and connectors within the compressor compartment.

Main Appliance Functions

Normal Operation and Initial Startup

Explains normal operation, temperature regulation, and behavior during first startup/power failure.

Defrosting Cycle Operation

Details the automatic defrosting process, including timing and component control.

Defrosting Management Flowchart

Illustrates the decision logic for initiating the defrosting cycle.

Cooler Temperature Sensor Malfunction

Describes symptoms and behavior when the cooler temperature sensor fails.

Component Accessibility and Replacement

Freezer Compartment and Battery Evaporator Access

Provides steps to access the battery evaporator and its components in the freezer.

Thermal Switches Replacement Procedure

Details the procedure for replacing the thermal switches, including connector detachment and wiring.

Air Box Access and Disassembly

Outlines steps to remove the air box to access internal components like PCB, fan, and lamp.

Compressor Compartment Component Identification

Identifies the compressor and connector box within the compressor compartment.

Troubleshooting Common Issues

Water Leakage Cause and Fix

Explains causes of water leakage and cleaning procedures for the drain hose valve.

Failed Defrosting Diagnosis and Solution

Lists possible causes for failed defrosting and how to test the heater and thermal switches.

Special Functions and Modes

Manual Defrosting Activation

Describes the steps to initiate a manual defrosting cycle using control buttons.

Display Symbols and LED Indicators

LED Indicators and Their Meanings

Explains the meaning of various LED patterns, including normal operation and faults.