CombiSteel 7480 Serie Mode D'emploi page 18

11 On the evaporator
there is ice also at the
end of the defrost.
12 Ice forms round the
evaporator fans.
13 Ice forms on the cold
room ceiling in front of
the evaporator.
14 Under the evaporator
basin there are
drippings or ice has
formed.
* If any failures in the unit working are found, make sure that these are not due to the missed ordinary
maintenance. Should that not be the case, ask for the intervention of an authorized assistance centre of ours. In
case you have to replace some parts, ask a distributor or an authorized reseller for ORIGINAL spare parts. The
spare part list is in the specific catalogue "Spare parts-Price list" that has to be expressly requested to the
distributor.
* Every six months the unit has to be controlled by an authorized assistance centre.
* The unit has not to be left unattended during the scrapping phase, because of the presence of toxic noxious
materials (refrigerant) subject to regulations that prescribe the discharge by suitable centres.
The unit is used in conditions
slightly different from the optimal
ones (still acceptable).
If the ice left is very much, it is
possible that the unit does not
execute the defrost correctly.
Hot air comes in through the
condensed water drain.
During the defrost condensed
water forms near and on the fans.
Too much steam forms during the
defrost and at the end of it the fans
restart too soon.
The drainpipe has been clogged by
ice as its internal heater is not
working.
The drainpipe is clogged.
The rings that connect the
drainpipes have loosened.
The basin has been deformed
because of a knock (e.g. during the
installation).
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Modify the calibration of the parameters
regarding the defrost in order to increase
the frequency of the cycles and the value
of the defrost termination thermostat.
According to the type of the unit, check
the efficiency of the solenoid valve, of the
heaters or of the deflection valve, i.e. the
devices concerning the defrost. If a part is
damaged, it is to be replaced.
Check that a syphon has been made on
the tract of the drain outside the cold
room.
Reduce the defrost termination
temperature and prolong the dripping
time.
Reduce the defrost termination
temperature and prolong the tripping
delay time of the fans at the end of the
defrost.
Check the supply circuit of the heater.
Replace the heater if it is broken.
Clean the drainpipe (see "Maintenance").
Restore the hydraulic connections.
If the deformation is slight, you can try to
remodel it; should that not be the case
change the basin.
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