Error Code - 318 - Abnormal Residual Current - Alarm Severity Major

Thomas Garcia

Modified on: Tue, 4 Dec, 2018 at 6:25 PM

Alarm ID	Alarm Name	Alarm Severity	Possible Cause	Suggestion
318	Abnormal Residual Current	Major	Cause ID = 1 The insulation resistance against the PGND cable at the input side decreases when the SUN2000 is running, which causes an excessively high residual current.	1. If the alarm occurs accidentally, the external circuit may be abnormal temporarily. The SUN2000 automatically recovers after fault is rectified. 2. If the alarm occurs repeatedly or persists, check whether the impedance between the PV string and the ground is excessively low.