Service Operations To Be Carried Out By Qualified Technicians Or By The Manufacturer; Troubleshooting - Zanotti SB Gebrauchs- Und Wartungshandbuch

Periodically check wear condition of electrical contacts and remote switches; if necessary
replace them.

12.2 Service operations to be carried out by qualified technicians or by the manufacturer

Following operations shall be carried out by qualified technicians or by the manufacturer
exclusively. Under no circumstances the user is allowed to:

12.3 Troubleshooting

During operation following troubles may occur:
1.
compressor every time the max. allowable temperature of motor windings is exceeded. Possible
causes are:
2.
ATTENTION
Do not use either hot water or any pointed, cutting, metal objects to remove ice blocks.
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.
• 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.
Compressor stops. The unit is equipped with an overtemperature device which stops the
- insufficient ventilation of the room where the unit is installed;
- anomaly in mains voltage;
- faulty operation of condenser fan.
Device reset is automatic.
Ice forms on the evaporator preventing air from flowing regularly.
Possible causes are:
- the door is opened too frequently;
- faulty operation of evaporator fan;
- faulty solenoid valve (in models with hot gas defrost);
- faulty defrost heater (in models with electric defrost);
- faulty defrost process. In this case some measures can be taken:
increase defrost termination temperature by some degrees, increase number of
defrosts.
3. Display does not light up. Check:
- if there is power to the unit;
- if mains cable is connected properly;
- fuses inside the electric panel
4. Unit does not start operating when pressing ON/OFF key (the display is turned on):
check microdoor connection keeping in mind that the switch contact must be closed
when the door is closed.
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