Generac QT04524ANSX owner manual Auto Start, Manual Start, Alarm and Warning Messages

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Control Panel

SEQUENCE OF AUTOMATIC OPERATION

Initial Conditions: Generator in Auto ready to run, load being sup- plied by the Utility Source through the transfer switch.

1.When the utility voltage fails (falls below 60% of nominal), a 10-30 second (programmable) “line interrupt” delay timer is started. The factory set time delay is 10 seconds. If at the end of the line interrupt time the utility voltage is above 60% the engine will not crank. If the utility voltage is still below the 60% of nominal at the end of the line interrupt time, the unit will crank and start. If the unit cranks for more than 10 seconds and the utility voltage rises above 80% of nominal (programmed pickup voltage) and the unit has not started, the crank cycle will abort.

2.As soon as the unit starts a 5 second “warm-up” timer is initi- ated. When the warm-up timer expires the control will transfer the load to the generator (through the RTS switch) if the utility voltage is less than 80% of nominal. If the utility voltage is greater than the 80% of nominal at the end of the warm-up time the load will not be transferred to the generator and a one minute low-speed cool down period will start. At the end of the one minute cool down period the generator will stop.

3.Once the unit is running and the switch has transferred the load to the generator the unit will monitor utility voltage. When utility voltage returns (above the programmable pickup voltage, normally 80% of nominal), a 15 second “Return to Utility” timer will start. At the end of the return to utility time, if the utility voltage is still above the pickup voltage, the unit will transfer the load back to the utility source and run the unit through a one minute cool down period. When the cool down period is over the unit will shut down and be ready for the next outage.

4.If during the cool down period utility voltage should fall below 60% of nominal for the line interrupt delay period, the unit will transfer the load back to the generator and continue to moni- tor the utility.

CRANK CYCLES AND OVERCRANK SHUTDOWN

If the unit fails to start during a cranking period it will display the Overcrank Shutdown Alarm. The system will control the cranking cycles as follows:

The first crank cycle is a 16 second crank time followed by a 7 second rest. The next 5 cycles will be 7 seconds of cranking time each followed by a 7 second rest time.

If the unit fails to start by the end of the 6 crank/rest cycles the Overcrank Shutdown Alarm will display and the unit will not attempt to crank until the alarm is reset.

AUTO START

This unit is designed to automatically start in the event of a util- ity failure or brown out condition. Brown out is defined as utility voltage less than 60% nominal, while utility is considered good when it is restored to at least the pickup value, 80% of nominal. These levels are fixed. The “Line Interrupt period” is an adjustable parameter by the dealer. If 2-wire start mode is activated, the unit will start when 2-wire start is active.

MANUAL START

Allows the user to start and run the generator manually.

Transfer of the load to the generator will occur if utility is lost while the unit is running in the manual mode (only if activated).

ALARM AND WARNING MESSAGES

Alarms are defined as “Latching” which means they must be cleared before the alarm message on the screen will clear. They can be of type “Shutdown” or not and are logged in the alarm log. Alarms are all annunciated on the display).

Warnings are “Non Latching” meaning the message automati- cally clears when the warning condition goes away. Warnings can not be of type “Shutdown” but they are logged in the alarm log. Warnings are all annunciated on the display.

LOW OIL PRESSURE SHUTDOWN ALARM

There is a 10 second delay before oil pressure is monitored.

HIGH COOLANT TEMPERATURE SHUTDOWN ALARM

There is a 10 second delay before engine temperature is moni- tored.

Once running there is a 1/4 second delay before shut down. The limit is set at 125° C or 257° F.

OVERCRANK SHUTDOWN ALARM

Occurs if the engine has not started within the specified crank cycle.

OVERSPEED SHUTDOWN ALARM

Warning indicator is measured and calculated by the microproces- sor. Overspeed is defined as +20% of nominal engine speed for 3 seconds, or +25% immediate.

Nominal engine speed = 60.0 Hz

RPM SENSOR FAILURE SHUTDOWN ALARM

During cranking: If the board does not see a valid RPM signal within four (4) seconds of cranking it will shut down and lock out on RPM sensor loss.

During running: If the RPM signal is lost for one full second the board will shut the engine down, wait 15 seconds, then re-crank the engine if in AUTO, it will not re-crank in MANUAL.

If no RPM signal is detected within the first four (4) seconds of cranking, the control board will shut the engine down and latch out on RPM sensor loss.

If the RPM signal is detected the engine will start and run normally. If the RPM signal is subsequently lost the control board will try two more re-cranks before latching out and flashing the RPM Sensor Failure message (if it is in AUTO).

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Contents Stationary Emergency Generator Table of Contents HOW to Obtain Service Operation and MaintenanceIntroduction Read this Manual ThoroughlyGeneral Hazards Safety RulesFire Hazards Data Label Identification RecordCoolant Recommendations Equipment DescriptionEngine OIL Recommendations Engine Protective Devices Fuel Requirements Fuel SystemNatural GAS Fuel System Propane Vapor Withdrawal Fuel SystemStationary Emergency Generator SpecificationsEngine Cooling SystemControl Panel Reconfiguring the Fuel SystemWeather and Maintenance Kits FOUR-LEAD, SINGLE-PHASE Stator Alternator Power Winding ConnectionsPhase Alternators Y Configuration Alternator AC Lead ConnectionsStator Power Winding Connections 3-phase, 120/208V 6 Lead Control Panel Interface Using the AUTO/OFF/MANUAL SwitchActivate the Generator Display Interface MenusChoose Language Troubleshooting Activation ChartUser Adjustable Settings Setting the Exercise TimerFuel Conversion OperationManual Start Alarm and Warning MessagesAuto Start Missing Crank Pulse Alarm UNDER-FREQUENCY Shutdown AlarmLOW Battery Alarm LOW Battery WarningMaintenance Alerts Common Alarm RelayMenu System Operating Unit with Automatic Transfer Switch Operating Unit with Manual Transfer SwitchStationary Emergency Generator Control and Operation Engine START-UP and TransferCheck Engine OIL General MaintenanceChanging Engine OIL Cooling INTAKE/OUTLETCoolant Change Engine CoolantOverload Protection for Engine DC Electrical System Exercise SystemBattery Replacement Battery MaintenanceBattery Fluid Spark PlugsSystem / Component Frequency Procedure Service ScheduleProblem Cause Correction Troubleshooting GuideWarranty Purchaser’s/Owner’s Recordkeeping Responsibilities Page Page Assy STR 390 25GD3 CPL Page Group a UL Circuit Breaker 225AF Page UL Circuit Breaker KG Page UL Circuit Breaker QN This page Left Intentionally Blank Page Weldment Frame 2.4L C2 Page Battery Tray C1 CPL Page Gasket Bosch 32 Page Weldment Radiator Support C2 Page Page Group D Harn Emissions Overlay 2.4L not Shown Page Group E Page Exhaust Elbow 2 1/4 OD 2 1/2OD Page Rear Wrap C2 CPL Page Page Page Page Page Page Page Page Page Page Page Page Page Page 04/07 a .Rev BackPg001