Always allow the DC link voltage to dissipate fully before working on inverters. THEY CAN AND WILL KILL YOU if you don't know what you are doing.
Screwed to the heat sink inside, is a little temp sensor that plugs on to the PCB. If it hasn't come unplugged, you can test it by metering the resistance of it as you heat it with a hot air gun. Remove it completely to test, you don't want to overheat everything else. The resistance should drop rapidly and there isn't much point in heating it below 150 ohms as you don't want to cook it! Im sure you can figure out how to test the PCB etc from here. If you can't then Im not going to tell you. You must be competent to be meddling with lethal voltages! Sorry.
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Always allow the DC link voltage to dissipate fully before working on inverters. THEY CAN AND WILL KILL YOU if you don't know what you are doing.
Screwed to the heat sink inside, is a little temp sensor that plugs on to the PCB.
If it hasn't come unplugged, you can test it by metering the resistance of it as you heat it with a hot air gun. Remove it completely to test, you don't want to overheat everything else.
The resistance should drop rapidly and there isn't much point in heating it below 150 ohms as you don't want to cook it!
Im sure you can figure out how to test the PCB etc from here. If you can't then Im not going to tell you.
You must be competent to be meddling with lethal voltages! Sorry.