Technical information

TROUBLE SHOOTING
24 May 2010 / M-SC3.5 / EN
5 TROUBLE SHOOTING
5.1 ALTERNATOR/ ELECTRICAL FAULTS
Beware of parts which are live!
Before working on the generator, remove the
30Amp fuse from the local control panel (see
figure 3) to prevent the engine from starting.
5.1.1 General
If any problem should occurs, check basic conditions and
examine all external wiring, switch gear and circuit
breakers. Also check if measuring instruments give the
correct value. If in doubt, measure directly on the
alternator terminals with an independent instrument. This
should only be carried out by an experienced electrician.
Check if the engine is running correctly at 3000 (50 Hz)
RPM according to its settings and does as well under load.
A RPM drop of 5% at full load is acceptable. Therefore a
no load setting should be at 3150 RPM = 52.5 Hz. Under
no circumstances should the RPM under full load be below
2940 RPM = 49 Hz
When the problem is in the RPM refer to section 5.2.
When the generator was stopped due to an electrical
failure, the origin of the failure that stopped the generator
will be displayed on the MasterView Easy remote control
panel. See section 5.1.2.
See section 5.1.3 for other electrical faults.
5.1.2 Failure or warning messages displayed on the remote control panel
AC warnings and failures Meaning What to do?
No failure None (no failure detected) --
UAC Low Generator output voltage too low See section 5.1.3
UAC High Generator voltage too high See section 5.1.3
IAC High AC output current is too high Reduce connected load or see
section 5.1.3
FAC Low
AC output frequency is too low, engine speeds is
too low
See section 5.2.3
FAC High
AC output frequency is too high, engine speed is
too high
See section 5.2.3
Overload
Too much load connected to the AC output of
the generator
Reduce connected load or see
section 5.1.3