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Do not connect the PV module to the OUT+ and OUT- of the optimizer. Otherwise,
the optimizer or PV module will be damaged, and the loss is not covered by the
warranty.
step 5 Connect the positive probe of a multimeter to OUT- of the optimizer, and the negative probe
of the multimeter to OUT+ of the optimizer to check whether the optimizer is faulty. If typical
value of output voltage is 1V, no fault occurs to the optimizer.
User Manual 5 Electrical Connection