28
8.
Anomalies
GENERAL TROUBLESHOOTING LIST
Failure
Possible Reason
What to do
The device is not working, does not
start.
No power to unit
Check if plug is properly wired.
Check if plug is ground and neutral
wired.
Check if any circuit breaker is down in
the electrical box.
Not cooling
Condenser blocked.
Evaporators blocked.
Air flow in the condenser obstructed.
It often happens that all the refrigera-
tion components are working and still
don’t cool.
Check :
The condenser
– make sure it is clean
otherwise clean it.
Remove all the objects that may pre-
vent the good air flow into the conden-
ser.
The evaporators -
check evaporators
for ice or blocked with products that
may prevent the air flow.
If they are blocked press dF button and
wait until the ice is completely re-
moved even if you need to repeat this
operation.
Remove all the objects that may pre-
vent the good airflow into the evapora-
tors.
As general advice: avoid direct sunlight
or heat sources that can affect on the
device like heaters, projectors, ventila-
tors or air conditioning equipment and/
or ventilation that has direct effect on
the refrigerated equipment.
Compressor broke down
Compressor “burns” for:
Too many starts.
Lack of refrigerant.
Power supply failure.
Filter obstructed.
Condenser obstructed.
If the compressor is “burnt”, the techni-
cian who will replace it has to consider:
Refrigerant recovery if still existing.
Do not pour the oil of the replaced
compressor.
To be quick in the replacement so that
the oil of the new compressor is not in
contact a too long time with the air as
this later is highly hygroscope (capacity
of absorbing water).
Once the circuit is sealed, make a good
vacuum and recharge the quantity of
refrigerant.
Filters should be also replaced as these
have the property of retaining undesira-
ble particles in the installation and also
humidity.
The compressor should be replaced by
one with identical features.
Refrigerant leaking
Charging valve unscrewed.
Poor use solder.
Incomplete welding.
Broken tubes.
Attempted defrosting with pointed
objects.
Check if the device is working.
If the condenser is not obstructed.
If the condenser is not obstructed and if
the fans are working switch of the de-
vices as it looks like a leak refrigerant.
Call engineer to detect the leak, to elim-
inate it and change the filters – make
the vacuum and replace the refrigerant
quantity.
5
SECURITY
a) The personnel responsible for the moving and instillation of the equipment
must have gloves, which should be flexible and anti-sliding, have protective
glasses as well as protecting shoes.
b) Protection equipment must always be used when necessary.
c)
In general the best practices for safety in work and hygiene should be applied
when working.
d) To clean, the equipment should always be unplugged.
e) Never use sharp objects when cleaning the equipment.
1.
Basic
C
a
re
S
e
curit
y
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