The Zanussi ZU 9154 Refrigerator has some known problems that occur often. Here are some easy to do solutions for the problems or error codes your Zanussi might be giving you.
The appliance is not receiving electricity.
The interior light bulb may have blown or is not correctly fitted.
The cooling system is not functioning efficiently, causing improper food storage temperatures.
The cooling system is overworking, possibly due to incorrect thermostat settings or high ambient temperature.
Ice formation is exceeding normal levels, possibly due to frequent door openings or a faulty door seal.
The appliance is making unusual sounds during operation.
Condensation or defrosting water is not draining properly.