The Luxor transformer showing Error Overloaded can indicate 2 possible problems.
1. If the overload message has a lower case “o”, this indicates a current in excess of the rated current. For 150w transformers the limit is 11 Amps, and for 300w transformers the limit is 22 Amps. For this current to trip the overload, it must be continually above these values for 1 second. The chassis LED will illuminate in RED.
2. If the overload message has an upper case “O”, this indicates current far in excess of normal operating current, typically caused by a short circuit. This is controlled by a hardware circuit and trips the overload immediately. The chassis LED will illuminate in RED.