A350 - Troubleshooting-Guide

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4. Unplug the enclosure cable from the Converter while the other end remaining connected to the Controller.Turn
on the machine. Set the multimeter to voltage mode and test the two big pins. The normal value should be 24 V.
5. Test the GND & pin 1, and then test the GND & pin 2 (see below) respectively. The test results should both be 2.2 V.
If any of the test results in step 4 or 5 is abnormal, then the Controller is broken. Replacing it might solve the problem.