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Following operations shall be carried out by qualified technicians or by the manufacturer exclusively.
Under no circumstances the user is allowed to:
•
replace electrical components
•
work on the electric equipment
•
repair mechanical parts
•
work on the refrigerating system
•
work on the control panel, ON/OFF and emergency switches
•
work on protection and safety devices.
12.3
Troubleshooting
During operation following troubles may occur:
1.
Compressor stops. The unit is equipped with an overheating device which stops the compressor every
time the max. allowable temperature of motor windings is exceded. Possible causes are:
-
insufficient ventilation of the room where the unit is installed;
-
anomaly in mains voltage;
-
faulty operation of condenser fan.
Device reset is automatic.
2.
Display does not light up. Check:
-
if there is power to the unit;
-
if mains cable is properly connected;
-
fuses inside the electric panel
3.
Unit does not start operating when pressing ON/OFF key (the display is turned on): check microswitch
connection keeping in mind that the switch contact must be closed when the door is closed.
12.4
Unsatisfactory efficiency of the unit:
If no defects are found in the unit check that: cold room doors are perfectly tight; there is no cold
dispersion; the cold room is used wisely; no unfrozen liquids or foodstuffs are placed in the low temperature
room; the evaporator is ice-free.
We recommend installation of the machines far from the doors especially when the cold room is expected to
be opened many times a day.
WARNING:
Removal of protections during machine operation is absolutely forbidden. They have
been developed to safeguard the operator’s safety.
12.6 Alarms
Message
Cause
“P1”
Temperature probe failure
“P3”
Humidity probe failure
“HA”
High temperature alarm
“LA”
Low temperature alarm
“HHA”
High humidity alarm
“HLA”
Low humidity alarm
“dA”
Door switch alarm
The alarm message is displayed until the alarm condition recoveries.
All the alarm messages are showed alternating with the room temperature except for the “P1” which is
flashing. To reset the “EE” alarm and restart the normal functioning press any key, the “rSt” message is
displayed for about 3s.
