one last thing. It is possible to remove said pot by jumping terminals 1 and 2 on the AVR. Have done this to both machines and will leave them at that. It is such a hassle to remove the sound proof casing to access any of it that in my opinion the secondary pot is surplus and nead not be...
Hi Waross.
Just tried diconecting the pot, but voltage falls down to 204 the same as the problem described above-maybe some jumper resistor or something requires inserting in its place. Anyhow, removed the pot and examined it carefully-turns out the resistive track is worn slightly at the 400v...
Hi Waross
The whole electrical end is effectively encased in first a sound proof casing system and inside this a second substatial metal cover. It is hard to imagine how salt contamination got in there, unless an aerosol mist found its way in via the fan openings. Regardless I am not a great...
Having removed the outer casing and accessed the guts of it.
Firstly I tried adjusting the trimmer pot on the AVR. Instantly I could adjust the voltage to 400 and even to 420 volts. However it appears to be impossible to fix voltage at 400. I suspect that this pot has a dead spot and simply...
Thanks scottyuk, could you please list any further info you may require for diagnosis, and any specific tests i should perform, test the excitation windings, rectifier, or i guess ultimately the avr etc. I have a specialist arriving next week as i only have basic test gear on board, but would be...
No changes to the voltage regulator. The casing of the machine recently got sprayed with sea water mist very briefly but the machine was not in operation and there is no sign of any intenal water damage.
Any advice greatly appreciated.
Machine type cummins/onan admiral 400v genset. Started the machine today and only producing 200 v/phase as oposed to 400. Also no frequency registered. Have manually adjusted engine speed however there is no change. I am reasonably certain that the governing...
