Rivacold RDF Serie Mode D'emploi Et D'entretien page 21

UK
10. DISPOSAL
In case the machine is to be disabled , it is necessary to disconnect it from the mains. The gas inside
the plant must not be dispersed in the environment.
FAILURES : Causes – Solutions
11.
Problem
Defrosting time too short
Time Interval between two defrostings too
long
Iced Evaporator
Dripping time not long enough
Air infiltration through the door which is too
frequently opened
Burnt electrical heaters.
The refrigerant inflow to the evaporator is
reduced .
Iced evaporator
only near the The orifice of the thermostatic valve is too
thermostatic little.
valve
High Overheating.
Damaged Deformed finns
evaporator
Blocked fan Fan motor breakdown.
motors Mains Tension lower than the allowed limits.
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 has to be 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.
Possibile cause solution
Increase defrosting time.
Increase defrosting cycles.
Check the possibile presence of
squashed pipes
Check the set dripping time.
Reduce the door opening frequency
and eliminate possibile fissure
Replace the faulty heaters .
Check the size of the thermostatic valve.
Increase the orifice diameter
Check the temperatures and operate on
the valve
Straighten the finns with a comb .
Replacement.
Check the tension value by a voltmeter .
RDF Pag. 21 REV.07 03_19