This procedure describes how to test an optimizer that does not produce power or is not recognized by the inverter.
b. Current Clamp
1. Pairing: If the optimizer is not recognized by the Inverter, initiate the pairing process. After pairing has completed, wait 15 minutes for the inverter to try and recognize all the optimizers.
2. Test if the optimizer is producing power by using a Current Clamp on the input cables and record your measurement. Before you proceed, switch the ON/OFF switch to OFF and wait until the DC voltage drops below 50V.
3. Check that the optimizer is not connected in a reverse polarity or has a loose connector. If you find a reverse polarity or a loose connection, fix the connection and try pairing again.
4. If the connection is OK: Disconnect the optimizer from the string (not from the panel) and measure the output voltage of the optimizer, record the measured voltage (Vout):
If Vout < 0.6 - Replace the optimizer
If Vout > 1.4 - Replace the optimizer
5. If Vout is in range 0.6 ≤ Vout ≤ 1.4, disconnect the optimizer from the string and panel and perform a diode test. If any of the following tests show under 100 ohms, replace the optimizer:
a. Switch your multimeter to "Resistance Test Mode (Ω)"
b. Test the Input: Connect the (+) probe to the optimizer (+) input connector and (–) probe to the optimizer (–) input connector and record the value.
c. Test the Output: Connect the (+) probe to the optimizer (+) output connector and (–) probe to the optimizer (–) output connector. Record the value.
6. If there is no diode fault: Measure the Voc of the panel and compare the results to the panel datasheet - a different value means there is an issue with the panel.
7. If any of the optimizer measurements are not in range, or If all values are in range but the problem persists, please open a case on the Support portal.