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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 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 trouble-
shooting procedure.
Troubleshoot When 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 and verify with voltmeter that the circuit is
turned off. Use Lockout/Tagout procedures.
C) On the roof, 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 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.
F) Remove tools and/or screws from the Q Aggregator, reactivate the PV
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.
REPLACING PARTS
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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.
The following details replacement of part number Q-BA-3-1P-PCBA.
Remove Q Aggregator Fuse and Connection Board
A) Power off the PV circuit and use a voltmeter to verify that the circuit is
turned off. Use Lockout/Tagout procedures.
B) On the roof, open the Q Aggregator using a standard screwdriver blade
on the four screws on the cover.
C) Assuming that the Q Aggregator may still be electrified, remove the fuse
protective cover by freeing the tabs closest to the main lug. Set aside
the fuse cover for future use
D) Check for voltage across all fuse terminals. If, and only if there is no
voltage at any of the terminals in the Q Aggregator, remove and tie
back the main electrical connections.
E) With the main connections disconnected, use a standard multi-meter,
(not a Megger) to check the PV circuits for obvious signs of short
circuits.
F) Physically inspect the cabling and terminations for signs of pinching,
insulation damage, or bad terminations.
G) If none are found, use a screwdriver to hold back the locking tab while
depressing the spring clip, and then use a gentle rocking motion to
remove the flag terminal. No electrical connections to the circuit board
should now exist.
H) Use a Phillips head screwdriver to remove the five screws that secure
the board.
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DANGER! Risk of injury. Do not chase dropped screws. They can
be replaced with standard stainless metric hardware.
I)
Set aside the screws for future use.
Replace Q Aggregator Fuse and Connection Board
A) On the roof, open the Q Aggregator using a standard screwdriver blade
on the four captured screws on the cover.
B) Use a voltmeter or electrical tester to again verify that the main circuit
coming into the box is not energized.
C) Assuming that the Q Aggregator may still be electrified, remove the fuse
protective cover by freeing the tabs closest to the main lug. Set aside
the fuse cover for future use
D) Check for voltage across all fuse terminals. If, and only if there is no
voltage at any of the terminals in the Q Aggregator, remove and tie
back the main electrical connections.
E) Remove the replacement board from packaging and insert it into the Q
Aggregator, taking care to line up with tabs and screw holes.
F) Recover the five screws removed from the original board and use these
to secure the new board. Torque screws to 9.7 in-lbs (1.1 N m).
G) Reattach the six locking flag terminals to the nearest terminals on the
Q Aggregator, taking care not to invert polarity. Connections should be
straight across from the bulkhead connectors.
H) Reattach the main lug connections and check that the connections are
secure. Reconnect the PV array connections.
I)
With no tools or loose screws in the Q Aggregator, reactivate the PV
circuit and test for voltage at the inputs and outputs of the fuses.
J) If voltages are appropriate in all locations, turn the power off and replace
the fuse cover.
K) Make one last check of connections and re-secure the lid on the Q
Aggregator. Check the seal on all sides for trapped debris. Remove any
debris, if needed.
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