ISA Zero T12 VT SP [23/40] Faults technical after sales assistance
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ISA Zero T12 VT SP [23/40] Faults technical after sales assistance

ISA Zero T12 VT SP [23/40] Faults technical after sales assistance
EN
USE AND MAINTENANCE MANUAL
428000730
037
23
ZERO PROGEL
THE APPLIANCE IS NOT WORKING
CAUSE SOLUTION
AUTHORISED
PERSONNEL
Blown protective fuse Previously fi nd the cause of the intervention
of the switch, and then re-introduce the new fuse.
USER
The master switch is open Close the master switch.
The plug is not inserted Insert the plug.
Electric black-out If the black-out should be prolonged, transfer the product
into an appropriate cold storage container.
THE INTERNAL TEMPERATURE IS NOT LOW ENOUGH
CAUSE SOLUTION
AUTHORISED
PERSONNEL
Evaporator/s obstructed completely by ice Carry out an additional defrosting cycle.
USER
Wrong setting temperature Set the appropriate temperature.
The appliance is affected by draughts or is
exposed to direct or refl ected sunlight
Remove any draughts and prevent any direct or refl ected
sunlight.
Insuffi cient cooling air fl ow rate of the air
condenser
Remove anything that may affect air fl ow inside the condens-
ing unit (paper sheets, cardboard, grids with an insuffi cient
number of holes, etc.).
Internal fans at standstill or with fans damage
TECHNICAL
ASSISTANCE
Internal ventilation is too high
Thermostat / Electronic control unit is not
effi cient
Replace the electronic control board.
If the control unit is set up especially for must R290 refrigerant,
it must only be replaced with an original replacement from
ISA.
Replace the temperature probes only after checking which of
the two is not operating effi ciently.
Air condenser blocked by dust or dirt in
general
Clean the condensing unit thoroughly.
The air condenser or MAINTENANCE FREE, in particular heavy
environments (eg presence of dust, the presence of excessive
moisture, oiled vapours etc..) in order to avoid performance
loss, needs accurate cleaning.
Insuffi cient refrigerant
load in the cooling system
TFind 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
CAUSE SOLUTION
AUTHORISED
PERSONNEL
No electric power supply
to the appliance
Check if there is a power cut.
Close the various switches on the power supply line.
USER
The power supply voltage is too low Check that the network voltage of the power supply cable is
220V +/- 10%.
Temperature set too high If the set temperature is higher than that of the air in the dis-
play area, the compressor does not activate itself.
Set a more suitable temperature if the current value is not
low enough
The pressure switch (if any) was activated
at maximum pressure
Check the reasons why the pressure switch is operating
at maximum pressure levels, such as: air condensing unit
blocked, condensing unit fan stopped, ambient temperature
too high, pressure switch broken.
TECHNICAL
ASSISTANCE
10. FAULTS - TECHNICAL AFTER-SALES ASSISTANCE
If the appliance is not working properly or stops working, before contacting the Customer support centre, check
the following:

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