This fault condition arises when there is a leakage current between the installation wiring and the ground where the panel is connected.

The causes of this failure may be as follows: 1. Improper device wiring to the ground. 2. Damaged devices in the loops or sounder circuits. 3. Problems in the electrical main supply to the panel. 4. Humidity in the installation wiring. 5. Failure of the panel hardware caused by impurities or metal chips inside as

To diagnose this fault condition follow these steps: 1. Disconnect all cables connected to the panel and supply it only through the batteries. 2. Wait about 5 minutes and check the earth leakage fault persists. 3. Check the tension between the Earth and ground. This value must be found between 6V and 7V DC, if not, the motherboard