The Zanussi ZCO 99/4 W 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 connected to the mains.
Activates the Fast Freeze facility.
The appliance is not operating due to a power cut.
The appliance is not operating due to a blown fuse.
The thermostat controls are set at 0 causing the appliance to not operate.
The appliance is located in an unsuitable position affecting its operation.
The thermostat control is set at a low temperature causing the appliance to not operate efficiently.