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4. Troubleshooting
4.1. Troubleshooting
Only trained and authorised personnel familiar with electrical systems and safety
issues may work on inverters and electrical installations.
Should the inverter not supply energy as expected, go through the checklist before calling serv-
ice.
1. Check that the grid is properly connected to the inverter and that the mains switch is
not switched off.
2. Check that there is sufficient solar radiation to generate power. U
PV
>250 V
3. Check for shading and loose cables/connections in the PV system.
4. Check whether the voltage of the PV modules are within the expected values. If not go
to point 7.
5. Check whether the voltage values of the grid lie within the threshold values. If this is
not the case please contact your public utility for technical assistance.
6. If the above-mentioned points are OK, wait 15 minutes to find out whether there is a
permanent failure.
7. If the PV system still supplies no power to the grid, check the display for:
- PV module voltage, current and power
- grid voltage, current and power
- event text, see log area
Then call service.
In the event of a failure, the red LED will flash and the display will show an event. Refer to the
table for event descriptions and recommended actions.
Event text
Description Remedy
Grid Grid values are out of range Check the voltage and frequency values in the display. If values
are zero, check the circuit-breaker (fuses) and cables. If values
are outside the applied limits, request technical service from in-
staller/energy company.
PV The PV isolation resistance is too
low
Make a visual inspection of all PV cables and modules. If the event
occurs frequently, request technical service.
Internal An internal event has occurred Make sure airflow over the heat sink is not obstructed. Wait 5 mi-
nutes. If the inverter does not reconnect (although sufficient irra-
diance is available) or the event occurs regularly, action must be
taken. Service inverter.
Fail Safe Internal or AC installation error Turn off both AC and DC (PV) power to the inverter. Make a visual
inspection of the PV installation, if everything is in order, wait 5
minutes and re-apply AC and DC (PV) power. If the inverter re-
sumes fail safe operation, action must be taken. Service inverter.
Table 4.1: Events
Note:
For more event descriptions, refer to the Protect PV Reference Manual in the download area
at: www.aegps.com/solarinverters
4. Troubleshooting
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