Troubleshooting Automatic Shutdown - Wacker G50 Manual De Operación

G50/G70/G85
2.9

Troubleshooting Automatic Shutdown

There are six automatic shutdown conditions: low oil pressure, high coolant temperature, engine overspeed, engine
underspeed, engine overcrank and low fuel. When these occur, the operator can perform certain diagnostic tests to
help identify the problem. Most of these diagnostics deal with the engine.
The generator, however, can also cause problems. Consult a qualified electrician or your nearest WACKER Dealer
for possible causes of generator problems.
Anytime the generator is down and waiting for service, secure it by closing and locking all doors,
and hang a "DO NOT RUN" sign on the metering panel.
Low Oil Pressure Shutdown
1. Check engine oil level using dipstick. Add oil if re-
quired.
2. Carefully inspect engine for oil leaks.
3. If oil level is good, start engine and verify loss of oil
pressure. Shut down engine immediately if oil pres-
sure value does not read at least 5 psi within 5
seconds.
Check the oil pressure shutdown sender and con-
necting wiring on the engine block. Check for conti-
nuity between sender and engine control module.
See wiring diagrams.
4. If oil level, oil pressure sender and connecting wiring
are good, the fault could be caused by an engine
failure.
Note: An engine failure caused by something other
than one of the five shutdown conditions discussed
on this page will cause a low oil fault condition to be
displayed.
High Coolant Temperature Shutdown
1. Restart engine and read water temperature. Stop
engine if temperature is above 234° F. Normal engine
operating temperature is between 170° - 190° F.
2. Allow engine to cool to a safe temperature and inspect
coolant level in radiator. Add coolant as needed.
3. Carefully inspect coolant hoses and engine block for
leaks.
4. Check that fan belt for water pump is tight.
5. Check the high temperature shutdown sender and
connecting wiring on engine block. Check for continu-
ity between sender on engine block and engine con-
trol module. See wiring diagrams.
6. If sender and wiring are good, consult engine
manufacturer's Operator's Manual or Service Manual
for possible causes of engine overheating.
All manuals and user guides at all-guides.com
WARNING
MAINTENANCE
Overspeed or Underspeed Shutdowns
Restart engine and read the AC frequency meter. Meter
should read aproximately 61.5 Hz under no-load condi-
tion.
If frequency is high, adjust engine rpm for correct fre-
quency (approximately 1850 rpm).
Overcrank Shutdown
1. Check fuel level.
2. Check for proper operation of fuel pump.
3. If engine still does not start, refer to engine
manufacturer's Operator's Manual or Service Manual
for possible engine problems.
Low Fuel Level Shutdown
1. Check fuel level.
Note: Warning light will come on when fuel level drops
below 25%. Engine will shut down only when level
drops below 15%.
2. Check for leaks in fuel tank.
3. If fuel level is good, check fuel level sender and
connecting wiring on engine. Check for continuity
between sender on tank and engine control module.
See wiring diagrams.
2A
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