Faults - Technical After-Sales Assistance - ISA Stratos Series Use And Maintenance Manual

10.

FAULTS - TECHNICAL AFTER-SALES ASSISTANCE

If the appliance is not working properly or stops working, before contacting the service of the Customer Support
Centre check the following:
CAUSE
Blown protective fuse
The master switch is open
The plug is not inserted
Electrical black-out
CAUSE
Evaporator/s obstructed completely
by ice
Wrong temperature setting
The appliance is affected by draughts or is
exposed to direct or reflected sunlight
Insufficient air flow for
cooling to the condenser
Internal fans at standstill or with fans damage
Internal ventilation is too high
Thermostat / Electrical base unit
not efficient
Condenser unit blocked by dust
or dirt in general.
Insufficient refrigerant
load in the cooling system
CAUSE
No electric power supply
to the appliance
Excessively low power voltage
Temperature set too high
Intervention of the maximum pressure
switch (where present)
428000939100
THE APPLIANCE IS NOT WORKING
SOLUTION
First find the cause of the trip
of the switch, and then replace the new fuse.
Close the master switch.
Insert the plug.
If the black-out should be prolonged, transfer the product
into an appropriate cold storage container.
THE INTERNAL TEMPERATURE IS NOT LOW ENOUGH
SOLUTION
Carry out an additional defrosting cycle.
Set the appropriate temperature.
Remove any draughts and prevent any direct or reflected
sunlight.
Remove anything which could obstruct
the circulation of air through the condenser (sheets of paper,
cardboard, insufficient slots in grille, etc.).
Replace the electronic control board.
If the control unit is set up especially for must R290 refriger-
ant, it must only be replaced with an original replacement
from ISA. Replace the temperature probes only after check-
ing which of the two is not operating efficiently.
Clean the condensing unit thoroughly.
The air condenser or MAINTENANCE FREE, in particular heavy
environments (e.g. presence of dust, the presence of exces-
sive moisture, oiled vapours etc..) in order to avoid perfor-
mance loss, needs accurate cleaning.
Find the cause behind the lower amounts of coolant and
eliminate it.Top up the coolant.If necessary, empty the sys-
tem before topping up.
THE COMPRESSOR DOES NOT START-UP OR OPERATES FOR A FEW MOMENTS
SOLUTION
Check if there is a power cut.
Close the various switches on the power supply line.
Check that the network voltage of the power supply cable is
of a nominal value of 220V +/- 10%.
If the temperature is higher than the air temperature
in the display chamber, the compressor will not start.
Set the suited temperature if the current temperature
is not low enough.
Check the reasons why the pressure switch is operating at
maximum pressure levels, such as: air condenser obstructed,
condenser fan with air stopped, ambient
temperature too high, pressure switch defective.
STRATOS
61
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