Power One AURORA MICRO-0.25-I-OUTD-US-208/240, Manual, Page: 58 / 78

Page
57
of
76 MICRO-0.25/0.3-I-OUTD-US-208-240 BCG.00612_AB
Part
5 Troubleshooting Guide
Once the short-circuit has been made, measure the insulation resistance (Riso) using a
megohmmeter positioned between the two shorted poles and ground (of the inverter).
If the measured insulation resistance is less than 1Kohm the inverter does not connect to the grid
due to a low insulation of photovoltaic module respect to ground.
The insulation resistance is affected by the environmental conditions the photovoltaic module
is in (E.g.: photovoltaic module wet from dump or rain); therefore, the measurement must be
made immediately after the anomaly.