25
2019-08
USE AND MAINTENANCE MANUAL
METRO’ MY19
EN
428001167037
13. FAULTS - TECHNICAL AFTER-SALES ASSISTANCE
If the appliance is not working properly or stops working,
before contacting
the
Customer Support Centre
check the
following:
THE APPLIANCE IS NOT WORKING
CAUSE
SOLUTION
PERSONNEL
AUTHORISED
Blown protective fuse
First find the cause of the trip
of the switch, and then replace the new fuse.
USER
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 product
into an appropriate cold storage container.
THE TEMPERATURE IS NOT LOW ENOUGH
CAUSE
SOLUTION
PERSONNEL
AUTHORISED
Evaporator/s obstructed completely
by ice
Carry out an additional defrosting cycle.
USER
Wrong temperature setting
Set the appropriate temperature.
The appliance is affected by draughts or is
exposed to direct or reflected sunlight
Remove any draughts and prevent any direct or reflected
sunlight.
Insufficient air flow for
cooling to the condenser
Remove anything which could obstruct
the circulation of air through the condenser (sheets of paper,
cardboard, insufficient slots in grille, etc.).
Internal fans at standstill or with fans damage
TECHNICAL
ASSISTANCE
Internal ventilation is too high
Thermostat / Electronic control board
not efficient
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 checking which of the two is not operating
efficiently.
Condenser unit blocked by dust or dirt in
general
Clean the condensing unit thoroughly.
In particular operating environments (e.g. presence of
dust, presence of excessive humidity, etc.) when the
performance of the equipment deteriorates, the condenser
requires careful cleaning.
Insufficient refrigerant load in the cooling
system
Find the cause of the loss of coolant and eliminate it. Top
up the coolant. If necessary, empty the system before top-
ping up.
THE COMPRESSOR DOES NOT WORK OR FUNCTIONS FOR SHORT PERIODS OF TIME
CAUSE
SOLUTION
PERSONNEL
AUTHORISED
No electric power supply
to the appliance
Check if there is a power cut.
Close the various switches on the power supply line.
USER
Excessively low power voltage
Check that the network voltage of the power supply cable is
of a rated value of 220V +/- 10%.
Temperature set too high
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.
Intervention of the maximum pressure
switch (where present)
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.
TECHNICAL
ASSISTANCE
