TROUBLESHOOTING
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DANGER!
Risk of electric shock. Some tasks are done with live
circuits in an outdoor rooftop environment. Always wear proper
personal protective equipment (PPE) for electrical and rooftop tasks.
One or More Branches Not Generating
Without removing the cover:
A) Verify that voltage is within range at the PV breaker at the main panel
when measuring from L1 to L2.
B) Power off the PV circuit (aggregated ac circuit) and use a voltmeter to
verify that the circuit is turned off. Use Lockout/Tagout procedures.
C) On the roof, disconnect the Q Cable connectors from all (up to three) of
the branch circuit bulkhead connectors on the Q Aggregator and seal
connectors.
D) Turn the PV circuit on at the main panel and again verify that 240V is
present from L1 to L2.
E) Using PPE, and taking care not to short the L1, L2 pins within each
connector, use a voltage meter to determine if each connector on the Q
Aggregator has 240V present from L1 to L2.
F) If all connectors show proper voltage then the Q Aggregator is working
correctly.
G) If some connectors exhibit proper voltage, but, after repeated testing,
other connectors do not exhibit proper voltage, continue to the Q
Aggregator board removal and replacement procedures.
H) If all connectors do not show voltage and the main PV circuit from the
main panel is active per step D, continue with the following troubleshoot-
ing procedure.
I) Reconnect, secure, and check all connections.
All Circuits Appear Non-Functioning
A) Verify that the PV breaker at the main panel reads 240V when measur-
ing from L1 to L2.
B) Power off the PV circuit (aggregated ac circuit) and verify with voltmeter
that the circuit is turned off. Use Lockout/Tagout procedures.
C) At the Aggregator, open the Q Aggregator using a standard screwdriver
blade on the four captured screws on the cover.
D) Use a voltmeter or electrical tester to verify that the circuit coming to the
main lug of the Q Aggregator is not live.
E) Inspect the Q Aggregator for evidence of loose connections at the main
lug or look for evidence of multiple blown fuses. Keep in mind that fuse
ends may be coated. It is best to test from the main lugs to the spade
terminals.
F) Remove tools and/or screws from the Q Aggregator, reactivate the PV
circuit (aggregated ac circuit), and test for voltage on the conductors
coming from main panel.
G) If no voltage is coming from the main panel check your electrical wiring
from the main panel.
H) If there is voltage at Q Aggregator main lug, and if the wires appear to
be stripped appropriately and terminated with orange handles down,
continue to the Q Aggregator board removal and replacement proce-
dures.