Defrost System - Whirlpool Multibras ARC8140IX Service Manual

♦ Only press the metal blade after ensuring that the wires are touching the connector bottom.
♦ Do not remove the silicon grease from inside the connector, for this grease protects the wire
terminals against moisture and rust.
6) Take the other connector and repeat the operation with
the other wires, then put the Sensor at its origin position.

5.7. Defrost System

This refrigerator holds an adaptive Defrost System, i.e., it's adjustable according to needfulness,
depending on the client's habits, environmental conditions, etc
Monitored by the Electronic Control, this system is constituted of the following components:
- Electronic Control;
- Defrost Heater;
- Defrost Temperature Sensor;
- Defrost Gutter;
- Evaporation tray (above the compressor).
The accurate frequency is defined by the Electronic Control throughout the following monitoring:
•
Compressor activity time;
•
Door opening frequency;
•
Time of the last executed defrosts;
Defrosts shall occur in every 8 hours (of the compressor activity), able to be reduced (adaptive) to every
4 hours (of the compressor activity) according to the needfulness / usage (determined by the Electronic
Control Software).
Defrost average time is from 10 to 20 min. and the maximum is 40 min., afterwards, the product will
return to its normal operation.
Upon a period of 5 minutes elapsing after the end of the Defrost cycle, the Electronic Control will turn the
Compressor on, and as the Defrost Sensor reaches a temperature 2ºC below the one set by the Freezer
Sensor, the Fan Motors will be also activated and the unit will return to normal operation.
Summarily, the Electronic Control activates the Defrost System, which will execute the following steps:
- Fan Motors (Refrigerator & Freezer) and Compressors are turned-off;
- Heater is activated;
- Defrost Sensor informs the Defrost ending when reach 15
- Heater is turned-off;
- Compressor is turned on after 5 Minutes the heater is off;
- Fan Motors are turned on when the differential of temperature between Defrost and Freezer Sensors
o
reach 2 C;
- Product returns to the programmed function before defrost.
This product's Defrost System has also a safety system which will put in action an immediate
defrost in case of an existing differential temperature between Defrost Sensor and Freezer Sensor
o
higher than 10 C for 10 minutes, helping against casual ice building up on the Evaporator.
When the product is with Fast Freezing mode enable, the Defrost System will be fixed and not adaptive,
and 2 defrosts will occur during this period, it means, the first will occur 3 hours after the compressor
activity and the second just 9 hours after (compressor activity) the first defrost.
Upon ending the activity of the Fast Freezing function (18 hours), the next defrost cycles will occur as
adaptive normal cycles.
MSEX0105i – Electronic No Frost Refrigerator Bottom Mount/ Dual Fan - Maestro High
IMPORTANT
o
C (or 40 minutes, max. time);
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