I've got a ~2006 FP 6000ND PMS 240v/50hz genset with ~1200 hours. During my two year ownership
I've only run it for ~20 hours or so and I've put in at least as many hours troubleshooting it for various issues. The current
problem is intermittent rev downs and automatic shut downs while running at low to moderate (0-3.5kw) loads. Overheating
is the initial suspect, but the pattern is not obvious.
shuts down anywhere between 15mins and 2hrs after a cold start.
- Load is variable, but does not seems to directly correlate to length of run time
- T.-Engine (engine temp) fault light usually comes on at the time of the shut down event, but not always
- T.Wind (AC winding temp) fault light has come on twice causing a shut down after
switching off all the loads after a successful run for the recommended 3-4 min cool down period.
- Sometimes no fault light comes on the panel at all during/after a shut down
- The engine
intermittently revs down before coming back to full RPMs as though fuel
supply has been temporarily cut. Usually no fault light when this happens.
- The coolant
temps have been anywhere between 185 and 205 when this has occurred
I have gone over much of the cooling
system to ensure good operation. New waterpump and impeller, cleaned strainer, no obstructions at through hull
, recent back flush of raw water
side to get out old broken impeller blades, fresh coolant
free of air, etc. The only thing obvious left to suspect is the (inaccessible) heat exchanger
that could possibly benefit from a barnacle bust session.
But this all assumes that the motor
is actually overheating
. What are the acceptable temperatures at different points in the engine/system? I'm seeing coolant temps at the expansion tank usually at 195*F but occasionally going above 200*F. Shooting various points around the engine I'm seeing temps in the 220s, even 230s. That seems extremely hot to me, especially compared to the big old Perkins
135 main engine, but I don't actually know and I have no baseline prior to the problem starting. Before I go any further troubleshooting the cooling
system, can someone tell me what kind of temps they are getting on their FP unit?