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Code 32 is Low Cranking Speed Sense.
If the engine actually starts and runs for a few seconds, then shuts down, your controller is most likely bad.
But to verify, connect a frequency meter to the output leads of the genset.
Press and hold the start button to keep the engine running for 4 or 5 seconds, and note the frequency.
If the frequency is about 60 Hz, the controller is bad.
If the frequency is below about 50 Hz, there is a problem in the generator end.