SELF TEST FAILED
OpenEVSE
Startup Self-Test Failure
On power-up, display shows 'SELF TEST FAILED' and unit will not enter ready state.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Internal relay test failure, GFCI self-test failure, Firmware integrity check failure, Hardware mismatch with firmware configuration
How to Fix / Troubleshooting
Safety first: Do not bypass self-test; it ensures safety-critical functions work.
- Step 1 – Power cycle: Turn off the breaker for 1–2 minutes, then restore power and observe whether the self-test passes.
- Step 2 – Listen and observe: During self-test, listen for relay clicks and watch for any error codes that appear briefly. Note any patterns.
- Step 3 – Firmware update: Reflash the main firmware with a known-good image from OpenEVSE, ensuring it matches your hardware revision.
- Step 4 – Hardware inspection: Check the main board, GFCI coil, CT, and contactor wiring for obvious damage or miswiring that could cause self-test to fail.
- Step 5 – Replace board: If self-test continues to fail with correct wiring and fresh firmware, replace the main control board.
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Repair Difficulty
Hard
4/5
Required Part
OpenEVSE Main Control Board
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