MMD Equipment 25S-3A3 - Manual (Page 12)

1.Safety
1-9
Do not, under any circumstance, open these during
operation:
Coolant drain valve and plug
Engine oil drain plug
Reduce the load if the circuit breaker actuates frequently during operation.
When a single-load is used, check the current of each phase, and adjust the load so that each
load value remains balanced.
If the above procedure is neglected during operation, the generator could be damaged or cause
a fire. If the machine is operated with the frequency lower than the rated frequency, it could
cause the generator or load to be damaged.
Unbalance of overload and load
PK0028
Draining during operation prohibited