Rivacold RSI Manual do Utilizador descarregar pdf (Página 22)

RSI Pag. 22 REV. 05 04/08

11.

FAILURES : Causes – Solutions

Problem Possibile cause solution

Defrosting time too short Increase defrosting time.

Time Interval between two defrostings too

long

Increase defrosting cycles.

Check the possibile presence of

squashed pipes

Dripping time not long enough Check the set dripping time.

Air infiltration through the door which is

too frequently opened

Reduce the door opening frequency

and eliminate possibile fissure

Iced Evaporator

Burnt electrical heaters. Replace the faulty heaters .

The refrigerant inflow to the evaporator is

reduced .

Check the size of the thermostatic

valve.

The orifice of the thermostatic valve is too

little.

Increase the orifice diameter

Iced evaporator

only near the

thermostatic

valve

High Overheating. Check the temperatures and operate

on the valve

Damaged

evaporator

Deformed finns Straighten the finns with a comb .

Fan motor breakdown. Replacement.

Blocked fan

motors

Mains Tension lower than the allowed

limits.

Check the tension value by a voltmeter

12.

OPTIONAL ITEMS

Coil varnishment

The varnishment give the coil a protection from corrosive agent that can be present inside the cold

room.

Discharge pipe heater

It is inserted into the condensation water discharge pipe so that the water formed during defrosting

operations does not freeze inside the waste.

This is used for application in low temperature cold rooms.

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