User manual

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This could be caused by the GSC400 speed sensing terminals picking up
stray signals during cranking. The speed sensing on the GSC400 is sensitive
in order to pick up low voltages during cranking. The GSC400 then thinks the
generator has started. Confirm by checking the speed displayed on the
controller during cranking (value beside “RPM”).
1. Check that there are no breakers off. This can unload the GSC400
sensing inputs allowing the wiring to act as an antenna.
2. Check the AC voltage and frequency during cranking. If it reads a few
volts then it is likely the GSC400 is picking this up. If the frequency reads
50/60Hz, then the controller will assume the generator has started
already. Try another L-L or L-N connection.
3. If necessary, install an isolation transformer to prevent stray signals.