Whirlpool WRX-17TM Manuel d'entretien - Page 6

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Defrosts shall occur in every 4 hours (of the compressor activity), able to be reduced (adaptive) to every 4 hours

(of the compressor activity) according to the 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.

Summarily, the electronic control activates the defrost system, which will execute the following steps:

Fan motor and compressors are turned-off;

Heater is activated;

Defrost sensor informs the defrost ending when reach 15° C (or 40 minutes, maximum time);

Heater is turned-off;

Compressor is turned on after 5 minutes the heater is off;

Motor fan is turned on when the differential of temperature between defrost and freezer sensors reach

2° C;

Product returns to the programmed function before defrost.

This 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 higher than 10° C for 10 minutes, helping

contend 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.

4. MAIN COMPONENTS

4.1. Cooling Circuit

4.1.1. Compressor & Acessories

Alternative hermetic and high efficient compressor, made by Embraco, to refrigerant R134a.

Remark: The compressor just works again when we have 7 minutes since its last cycle.

The relay and thermal protector are sold together the compressor, if necessary to change individually, consult

the spare parts list.

This compressor also has a capacitor (located on the electronic control box). Its function is help the compressor

works efficient and not to execute start-up.

The filter dryer to R134a is a filter with higher quantity of drier element. You can use a filter to R134a in systems

R12, but the inverse is not allowed.

To other information, norms and procedures, consult specific manuals to hermetic system interventions.

4.1.2. Condenser

This refrigerator has a new concept of built-in condenser, which is known as the "clinched".

Different of a traditional built in condenser (which are inside the cabinet and in contact with another metallic

surface – by others manufacturers), the clinched condenser changes temperature direct to the ambient,

increases the yield, because its contact area is larger.

As this condenser does not be changed, like a normal condenser, it is necessary clean it very well when occurs

interventions on the hermetic systems. Use nitrogen pressure and/or

contamination).

the refrigerant gas (to severe