Eaton Generator Owner's Manual

Also see for 10 kW Air-cooled: Owner's manual

203.6 PROTECTION SYSTEMS3.6.1 ALARMSHighest Priority (Latching) Displayed on the control panel and theexternal red LED. They must be cleared before the alarm messagegoes away. The alarm log records each occurrence (see Appendix- "Menu System").Low Oil Pressure (Shutdown Alarm)A five (5) second delay on start-up and seven (7) second delayonce the engine is running.This switch (Figure 3.5) has normally closed contacts that areheld open by engine oil pressure during operation. Should the oilpressure drop below the five (5) PSI range, switch contacts closeand the engine shuts down. The unit should not be restarted untiloil level is verified.High Engine Temperature (Shutdown Alarm – Auto Reset)A 10 second delay on start-up and one (1) second delay beforeshutdown. Auto reset when the condition clears and restart theengine if a valid start signal is still present.This switch’s contacts (Figure 3.5) close if the temperature shouldexceed approximately 144° C (293° F), initiating an engine shut-down. Once the oil temperature drops to a safe level the switch’scontacts open again.Over Crank (Shutdown Alarm)This occurs if the engine has not started within the specified crankcycle. (See "Cranking" section.)NOTE:The oil drain hose may be routed in the opposite direction asshown in figure.Figure 3.5 – Low Oil Pressure andHigh Temperature SwitchesOil FilterOilDrainHoseLow Oil Switch High Temp SwitchLoosenOver Speed (Shutdown Alarm)4320 RPM for three (3) seconds or 4500 RPM immediately. Thisfeature protects the generator from damage by shutting it downif it happens to run faster than the preset limit. This protectionalso prevents the generator from supplying an output that couldpotentially damage appliances connected to the generator circuit.Contact the nearest Dealer if this failure occurs.RPM Sense Loss (Shutdown Alarm)During cranking, if the Control Board does not see a valid RPMsignal within three (3) seconds, it will shut down and lock out onRPM sense loss. While engine is running, if RPM signal is lost forone (1) second the Control Board will shut the engine down, wait15 seconds, then re-crank the engine. If no RPM signal is detectedwithin the first three (3) seconds of cranking, the Control Boardwill shut the engine down and latch out on RPM sensor loss. If theRPM signal is detected, the engine will start and run normally. Ifthe RPM signal is subsequently lost again, the Control Board willtry one more re-crank attempt before latching out and displayingthe RPM sensor failure message.Under-frequency (Shutdown Alarm)After starting, if the generator stays under frequency for morethan 30 seconds it will shut down. The under-frequency setting is50 Hz.Internal Fault (Shutdown Alarm)This alarm cannot be cleared, call service dealer.Undervoltage (Shutdown Alarm)If the generator voltage falls below 60% of nominal for more thanfive (5) seconds, it shuts down.Overvoltage (Shutdown Alarm)If the generator voltage rises above 110% of rating for greater thanthree (3) seconds, an alarm will be issued and the unit will shutdown.If the generator voltage rises above 130% of rating for greater than0.2 seconds, an alarm will be issued and the unit will shut down.Clear AlarmClear the alarm by setting the AUTO/OFF/MANUAL switch to theOFF position. Press the ENTER key to unlatch any active fault andclear the corresponding alarm message.3.6.2 COMMON ALARM RELAYThe common alarm relay will be activated if there is a shutdownalarm. It will not activate on warnings or indicate that the AUTO/OFF/MANUAL switch is in the OFF position. The OFF position willclear the alarms and the relay. The relay will not be used to indicatea generator is not activated.The common alarm terminals are wired to a set of potential-free(dry) contacts on the Nexus contoller board. These Normally Open(N.O.) contacts close when an alarm condition occurs and areused to activate a remote signaling device. The circuit is rated fora maximum of 130mA at 24 VDC.Operation