The Zanussi ZRT 143W1 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 any electrical power.
The internal temperature of the appliance exceeds the desired level.
The internal temperature of the appliance is below the desired level.
A substantial amount of frost and ice has accumulated inside the appliance.
The appliance is producing an unusual amount of noise during operation.