Instructions / Assembly

SP-1000
The Solar PaQ
Solar Panel + Inverter + Universal Roof Mount Racking
UPC: 861150002609
Microinverter Instructions
Troubleshooting an inoperable BDM-250
To troubleshoot an inoperable BDM‐250, follow the steps in the order shown:
1. Check the connection to the utility grid. Verify that the utility voltage and frequency are within
allowable ranges shown in the label of BDM‐250.
2. Verify utility power is present at the inverter in question by removing AC, then DC power. Never
disconnect the DC wires while the BDM‐250 is producing power. Re‐connect the DC module
connectors, and then watch for the LED blinks.
3. Check the AC branch circuit interconnection harness between all the BDM‐250. Verify that
each inverter is energized by the utility grid as described in the previous step.
4. Make sure that any AC disconnects are functioning properly and are closed.
5. Verify the PV module DC voltage is within the allowable range shown in the label of BDM‐250.
6. Check the DC connections between the BDM‐250 and the PV module.
7. If the problem persists, please call customer support at NEP.
WARNING: DO NOT ATTEMPT TO REPAIR THE BDM‐250; IT CONTAINS NO
USER‐SERVICEABLE PARTS. IF TROUBLESHOOTING METHODS FAIL, PLEASE RETURN THE BDM‐250 TO YOUR DISTRIBUTOR
FOR MAINTENANCE.
Disconnecting a BDM-250 from the PV Module
To ensure the BDM‐250 is not disconnected from the PV modules under load, adhere to the
following disconnection steps in the order shown:
1. Disconnect the AC by opening the branch circuit breaker.
2. Disconnect the first AC connector in the branch circuit.
3. Cover the module with an opaque cover.
4. Using a DC current probe, verify there is no current flowing in the DC wires between the PV
module and the BDM‐250.
5. Care should be taken when measuring DC currents, most clamp‐on meters must be zeroed
first and tend to drift with time.
6. Disconnect the PV module DC wire connectors from the BDM‐250.
7. Remove the BDM‐250 from the PV array racking.