enphase IQ System Controller 3M - Page 22

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IQ System Controller 3M quick install guide IQ System Controller 3M quick install guide
Aux wiring: System Shutdown Switch
Section C - Wiring
Wiring test for SSD Switch in the ON position
a. Ensure the SSD Switch is in the ON position.
b. Set the multimeter to test for continuity.
c. Measure the terminal test points:
• 1 and 2 at the SSD Switch
• 1 and 2 at the SSD header
• 3 and 4 at the SSD Switch
• 3 and 4 at the SSD header
The multimeter should show positive continuity in all cases.
IQ System Controller 3M units may get stuck in a system shutdown or rapid shutdown state, preventing system provisioning.
Either follow the wiring tests for the SSD Switch in the ON position or the wiring tests for the SSD Switch in the OFF position.
d. Verify the connections and rewire them if required.