Rapid Shutdown (RSD) E-Stop Test Failed

When performing the E-Stop test to confirm Rapid Shutdown (RSD) wiring is correct on a Powerwall+, the test fails and RSD does not initiate.

Note

For Powerwall+ units on software version 24.4.2 or greater, failing the RSD Self Test five times in a row will result in RSD Self Test Lockout, causing the unit to go to sleep. If this has occurred:

Disconnect the E-Stop button wiring and replace the Rapid Shutdown (RSD) jumper.
Turn the Powerwall+ switch OFF, wait 3 seconds, the turn the switch ON.
Wait for the Powerwall+ LED to blink red, then turn the Powerwall+ switch OFF, wait 3 seconds, and turn the switch back ON.

This procedure should clear the RSD Self Test Lockout. Continue with the following troubleshooting steps.

Confirm the System Shutdown Switch Emergency Stop (E-Stop) button is in the engaged (pushed in) position.
Disconnect the E-Stop button wiring and replace the Rapid Shutdown (RSD) jumper. Turn the Powerwall+ Enable switch OFF.
Figure 1. Powerwall+ RSD Jumper
Note
Although the Enable switch is NOT a certified means of Rapid Shutdown (RSD) per NEC 690.12 for Powerwall+, turning the Enable switch off will shut down all equipment.
If turning the Enable switch off DOES shut down all equipment, reconnect the E-Stop button wiring and inspect the following:
1. Confirm the RSD jumper has been removed and the E-Stop button is connected to the RSD IN / RSD Out ports.
2. Confirm the RSD connector is not damaged; if the connector is broken or compromised and cannot be fixed, contact Install Support.
3. Confirm the wires are free of damage and the lines present proper continuity. If any damaged wiring is found, replace it.
4. Confirm the wires have been stripped sufficiently to make contact with the connector.
5. Confirm the wires are securely terminated and all terminals have been torqued correctly.
6. Confirm the terminal block is seated correctly on the E-Stop DIN rail.
7. Perform a continuity test on the RSD wires at the Powerwall+; the tester should ring when touching the RSD wires, and should stop ringing when the E-Stop is engaged.
8. If there are multiple Powerwall+ units, confirm each unit is connected to a dedicated electrical contact of the E-Stop.
  Note
  The following illustrations depict Powerwall 3, but the concepts are applicable to Powerwall+ as well.
  Figure 2. Good Wiring Example: Each Unit Connected to Electrical Contact in E-Stop
  Figure 3. Bad Wiring Example: Both Powerwall 3 Connected to a Single Electrical Contact
  Figure 4. Bad Wiring Example: Powerwall 3 Units Connected to E-Stop in Series (Does Not Work)
  Figure 5. Bad Wiring Example: Second Powerwall 3 Not Connected to E-Stop
If turning the Enable switch off DOES NOT shut down all equipment:
1. Inspect the Rapid Shutdown wiring harness in the Powerwall+ battery assembly:
  - Ensure the Rapid Shutdown wiring harness is not disconnected.
  - Disconnect the Rapid Shutdown wiring harness and measure the voltage between the two terminals of the connector (at the ends of the blue and white wires). If the value is not stable and close to 12V, ensure the battery assembly CAN and 12V connector is securely plugged in to the terminal in the solar assembly. If the voltage reading is still 0V, replace the battery assembly CAN and 12V harness as it may have been damaged.
  - At the Rapid Shutdown wiring harness, measure the continuity between the two pins at the ends of the red and black wires. If there is no damage to the harness, the pins will be shorted when the Enable switch is ON.
  - If the harness is damaged, splice the wires and use connectors to repair it.
    Warning
    Turn the Powerwall+ Enable switch OFF, then turn the Powerwall+ breaker OFF before cutting any wires.
    Figure 6. Rapid Shutdown Wiring Harness Spliced with Wagos
2. If RSD still fails to initiate, contact Tesla Install Support.