ISA TORNADO - Troubleshooting and Technical Assistance

20 2020-05
TORNADO
EN 428000747237
Use and maintenance manual
13. FAULTS - TECHNICAL AFTER-SALES ASSISTANCE
In case of uncertain or no operation, before requesting the intervention of the Technical Assistance service
perform the following checks:
MALFUNCTION CAUSE SOLUTION USER TECHNICAL ASSISTANCE
THE EQUIPMENT
DOES NOT WORK
Blown protective fuse
First nd the cause of the trip
of the switch, and then replace the new fuse.
The master switch is open Close the master switch.
The plug is not inserted Insert the plug.
Electrical black-out
If the black-out should be prolonged, transfer the prod-
uct into an appropriate cold storage container.
THE TEMPERATURE
IS NOT SUFFICIENTLY
LOW
Evaporator(s) completely blocked with
ice
Carry out an additional defrosting cycle.
Wrong temperature setting Set the appropriate temperature.
Equipment being struck by
currents of air or exposed to
direct or reected sunlight
Remove any draughts and prevent any direct or reected
sunlight.
Insucient air ow for
cooling to the condenser
Remove anything which could obstruct
the circulation of air through the condenser (sheets of
paper, cardboard, insucient slots in grille, etc.).
Internal fans not working
or damaged fans
Replace the ventilators/fans.
Thermostat / Electronic control board
not ecient
Replace the thermostat/electronic control board.
If the electronic control board is used on appliances with
R290 coolant, it must only be replaced with an original
spare part supplied by the manufacturer. Replace the
temperature probes only after having ascertained which
of them is inecient.
Condenser unit blocked by dust
or dirt in general
Clean the condensing unit thoroughly.
The condensing unit in particular operating environ-
ments (e.g. presence of dust, presence of excessive
humidity, etc.) when the performance of the appliance
deteriorates requires careful cleaning.
Insucient refrigerant quantity
in the cooling system
Find the cause of the refrigerant loss and remove it; top
up the refrigerant load
if necessary having emptied
the system.
THE COMPRESSOR DOES
NOT START WORKING
OR WORKS FOR
VERY SHORT PERIODS
No electric power supply
to the appliance
Check if there is a power cut.
Close the various switches on the power supply line.
Power supply voltage
too low
Check that the mains voltage of the power supply cable
corresponds to the nominal value 115V +/- 10%.
Temperature set
too high
If the temperature is higher than the air temperature
in the display chamber, the compressor will not start. Set
a more suitable temperature if the current value is not
low enough.
Maximum pressure
switch intervention (if present)
Check the cause of the continuous interventions of the
maximum pressure switch such as: blocked air condens-
er, air condenser fan stopped, excessively high ambient
temperature, breakage of the pressure switch itself.