Dometic Frigo - Defrosting the Cooling System

EN
Frigo Operation
15
5.6 Defrosting the cooling system
When the cooling area temperature drops, condensation forms. This condensation
freezes on the surface of the evaporator. To obtain full cooling capacity, this ice
needs to be removed. This is accomplished with a defrost cycle. If the cooling capac-
ity drops, this is a certain sign that defrosting is necessary.
A
I
Your cooling system is equipped with one of two defrosting mechanisms:

Air circulation defrosting:
Only the evaporator blower, assisted by the ambient air, is used to defrost the
evaporator.
I

Hot gas defrosting: (additional equipment)
Heated refrigerant is used to defrost the evaporator.
NOTICE!
The cooling system should never be switched off during manual or auto-
matic defrosting. In the event of frequent interruptions (switching off the
cooling system before automatic defrosting, e.g. loading and unload-
ing), it may be necessary to start defrosting manually (see chapter “Man-
ual defrosting” on page 16). Otherwise, the evaporator surface may
freeze and the cooling capacity of the plant will be severely limited.
NOTE
The condensation is drained off through the vehicle’s drainage line. A
puddle may form under the vehicle when it is at a standstill. The drainage
hose should be kept clear at all times.
NOTE
Extended periods of operation of the cooling system without external
supply of heat can result in longer defrosting phases. This is not a defect.
After a period of 10 minutes, the defrost cycle is terminated automati-
cally.
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