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iGUARD Troubleshooting

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Specific Error Displays

Listing of all error and warning messages in the iGUARD controller.
J1939 Suspect Parameter Number (SPN) Displays
J1939 Failure Mode Indicator Number (FMI) Displays

 

Specific Error Displays

If the iGUARD is showing specific warning or fault information, it is usually pretty straightforward (i.e. SENDER OPEN means that the sender is not providing a current path to ground, or SENDER SHORTED meaning that a senders resistance is below the minimum limit) However, there are some messages that are rare or could make use of further explanation. The full listing of all errors and their various explanations are below.

 

  1. "AC CURRENT TOO HIGH" - The setpoint for the AC current has been exceeded. If this is the cause of shutdown, the AC current remained higher than the instantaneous overcurrent setpoint for longer than the bubble timer setting.

 

  1. "AC FREQUENCY HIGH" - The setpoint for the AC frequency has been exceeded. If this is the cause of shutdown, the AC frequency remained too high for longer than the bubble timer setting.

 

  1. "AC FREQUENCY LOW" - The setpoint for the AC frequency has been exceeded. If this is the cause of shutdown, the AC frequency remained too low for longer than the bubble timer setting.

 

  1. "AC VOLTAGE TOO HIGH" - The setpoint for the AC voltage has been exceeded. If this is the cause of shutdown, the AC voltage remained too high for longer than the bubble timer setting.

 

  1. "AC VOLTAGE TOO LOW" - The setpoint for the AC voltage has been exceeded. If this is the cause of shutdown, the AC voltage remained too low for longer than the bubble timer setting.

 

  1. "AIR DAMPER CLOSED" - The digital input connected to the air damper position switch (the switch makes when the air damper closes) is active. As long as this input is active, the engine will not attempt to start, as the engine cannot run with it's air source cut off.

 

  1. "AIR FILTER BLOCKED" - The digital input connected to an air filter differential pressure gage (typically a Murphy DP20 series differential pressure gage) is made. This indicates that the pressure differential across the filter is too high, and the filter media should be replaced. This is a warning only and will not keep the set from running, however, running a set with a clogged air filter will degrade performance, load capacity, and reliability.

 

  1. "AIR TEMP. HIGH" - The setpoint for the external air ambient temperature has been exceeded.

 

  1. "AUTO" - The screen displays this to let the user know that it is in AUTO start mode, and is waiting for a remote start signal. The controller constantly 'watches' a digital input and/or a Modbus register, and when the digital input goes active, or the Modbus register becomes TRUE, the controller initiates an automatic start sequence .

 

  1. "AUTOSTART" - This message indicates that an automatic starting sequence is happening.

 

  1. "B2B COMMUNICATION ERROR" - This message indicates that the interboard communications (between the user interface board, I/O board or the energy monitoring board) has failed. While it is possible to cycle power and recover from a truly random event, this serious error usually indicates a board set with a hardware problem. If you see this and it either won't clear with a power cycle, or if it clears and then reoccurs, please contact FW Murphy Technical Services at (918) 317-4100

 

  1. "BATTERY CHARGER FAILED" - In NFPA applications, a conforming external battery charger has a dry contact that is held energized anytime the output voltage is correct. This contact will transfer (the relay will de-energize) if the charger loses power, or the output fails or drops below the minimum proper voltage. This message is displayed if the digital input tied to the charger contact is in the "fault" (active) position. This is a warning only indication and the set will start and run even with this fault active.

 

  1. "BATTERY VOLTAGE HIGH" - The setpoint for the battery charge voltage high limit has been exceeded. This indicates that the battery is receiving a charge voltage that is greater than the maximum recommended, and that battery damage may start to occur. While this error will not keep the set from starting and running, overcharging the battery will shorten its life dramatically.

 

  1. "BATTERY VOLTAGE LOW" - The setpoint for the battery charge voltage low limit has been exceeded. The battery voltage is approaching a lower limit where it may not have sufficient capacity to crank and start the engine, thus it can seriously affect reliability. This message is typically seen with systems that either do not have an external charger, or are not load tested often enough to maintain proper battery charge.

 

  1. "BATTERY WEAK:FAILED" - The setpoint for the minimum battery voltage during cranking has been exceeded. The battery voltage falling below the setpoint can indicate a bad battery cell, oxidized or improper connections, or some other cranking system fault. This message is typically seen with systems that have a battery that is either failing or will fail shortly.

 

  1. "CHX SENDER OPEN" - The sender attached to this channel is not registering as there. The variable precision current drive is unable to adjust low enough to get the measured voltage into the proper operating range for the exact make and model of sender attached to this channel. Typically, this message indicates that the wiring is disconnected, cut or crushed and the sender cannot bee "seen" by the controller. A unit displaying this message cannot be started until the error is cleared.

 

  1. "CHX SENDER SHORTED" - The sender attached to this channel is registering as a short to ground. The precision current drive is unable to adjust high enough to get the measured voltage into the proper operating range for the exact make and model of sender attached to this channel. Typically, this message indicates that the wiring is shorted to ground somewhere and the sender cannot bee "seen" by the controller. A unit displaying this message cannot be started until the error is cleared.

 

  1. "COOLANT LEVEL LOW" - The digital input connected to the coolant level switch (the switch makes when the coolant level is too low) is active. As long as this input is active, the engine will not attempt to start, as the engine cannot run safely with no coolant.

 

  1. "CRANK COOLDOWN" - The engine has cranked for the preprogrammed crank time, and the starter motor is now cooling for the pre programmed time. (Also called CRANK REST)

 

  1. "CRANK RETRIES EXCEEDED" - Also commonly called "OVERCRANK" - the set tried to automatically start the programmed number of crank cycles, but did not succeed in the allotted number of tries. This error will cause a lockout, and require the controller to be reset before the set can be started and run.

 

  1. "DEBUG WARNING 00" - Internal diagnostic indicator. If you see this message displayed, please call Murphy Technical Services (918) 317-4100

 

  1. "DIGITAL INPUT X" - This message indicates that one or more of the digital inputs is/are active. Depending on what the inputs are programmed for this may act as an immediate warning, a warning after a delay, an immediate shutdown, or a shutdown after a delay. If you are experiencing nuisance shutdowns or warnings and the status/warning or history screens indicate that the cause is one of the digital inputs, see the section under "Total System" #18 Troubleshooting digital inputs" The value of "X" is from 1 to 24.

 

  1. "ECU ENGINE SHUTDOWN" - This message indicates that the set stopped because the ECU on the engine caused a shutdown. This message means that the engine ECU itself - not the iGUARD - stopped the set operation.

 

  1. "ECU ENGINE WARNING" - This message indicates that the ECU has issued a warning that at least one engine parameter is in a warning condition. It comes from the ECU. Further information on the exact warning can be found in the iGUARD controller screen "J1939 Status"

 

  1. "ECU NOT RESPONDING" - This message indicates that the iGUARD is not communicating with the ECU - typically because the ECU is powered off, the communications wires are not connected (or not connected properly), there is no terminating resistor in the J1939 wiring, the ECU control relay on the iGUARD is not programmed correctly or something similar.

 

  1. "ECU WAIT TO START" - This message means that the ECU is issuing a wait to start command. Typically this means that the ECU is controlling any preheating or glow plug type devices that are needed to ensure the engine can start. The iGUARD will not crank until the ECU wait to start message has cleared.

 

  1. "ENERGIZE TO STOP ACTIVE" - This message means that a relay programmed for an "Energize to stop" application is active. The energized to stop relay is controlled by a programmable timer. When the set no longer has a valid call to run, and any cooldown or power good timers have expired, the relay is turned on and the counter begins to count down. This timer state (as all programmable timers) can be observed on the bottom line of the STATUS/WARNING page of the iGUARD display.

 

  1. "ENGINE COOLDOWN" - This message indicates that that the controller has lost the remote call to run signal, and that it can begin a cooldown. This timer allows the engine to run unloaded for a pre-programmed time to allow the various engine parts (turbocharger, exhaust headers etc.) time to cool down to maximize life. This timer state (as all programmable timers) can be observed on the bottom line of the STATUS/WARNING page of the iGUARD display.

 

  1. "ENGINE NOT READY CRK" - This message indicates that a digital input programmed for crank cut is active. Typically it is used as a NFPA required secondary crank disconnect, when the set doesn't have a magnetic pickup (AC speed sensing). It usually is connected to a N.O. (closes on pressure rise) oil pressure switch.

 

  1. "ENGINE NOT READY MAG" - This message indicates that the engine is not ready to start (or to recrank in the case of a false start) because there is a signal coming into the controller through the magnetic pickup input that indicates that the engine is still turning.

 

  1. "ENGINE NOT READY RPM" - This message indicates that the engine is not ready to start (or to recrank in the case of a false start) because there is an RPM value coming into the controller from the ECU that indicates that the engine is still turning.

 

  1. "ENGINE SPEED TOO HIGH" - As a warning/status message, this indicates that the overspeed setpoint for the engine RPM has been exceeded. As an ES (Error Stop) message - the cause of shutdown - the engine RPM remained too high for longer than the bubble timer setting.

 

  1. "ENGINE SPEED TOO LOW" - As a warning/status message, this indicates that the underspeed setpoint for the engine RPM has been exceeded. As an ES (Error Stop) message - the cause of shutdown - the engine RPM remained too low for longer than the bubble timer setting.

 

  1. "ENGINE TEMP. TOO HIGH" - As a warning/status message, this indicates that the high coolant temperature warning setpoint for the engine has been exceeded. As an ES (Error Stop) message - the cause of shutdown - the engine coolant temperature exceeded the high coolant temperature shutdown setpoint.

 

  1. "ENGINE TEMP. TOO LOW" - As a warning/status message, this indicates that the low coolant temperature warning setpoint for the engine has been exceeded.

 

  1. "E-STOP (DI) N/C" - An emergency stop switch connected to this digital input has OPENED from ground, causing the set to shutdown and lock out. This input must be maintained closed to ground for the set to be able to run.

 

  1. "E-STOP (DI) N/O" - An emergency stop switch connected to this digital input has CLOSED to ground, causing the set to shutdown and lock out. This input must be ungrounded for the set to be able to run.

 

  1. "E-STOP (J8)" - This message indicates that the normally closed emergency stop switch connected between terminals J8-1 and J8-2 has been opened. Since there must be continuity between J8-1 and J8-2 to provide power to the onboard relays, the controller will be unable to stop an energized to stop type output, and should only be used with energized to run - power to the fuel solenoid, governor, or ECU - systems.

 

  1. "FORCED RELAYS" - This message indicates that the user is in the I/O status screen and is manually controlling the various relays.

 

  1. "FUEL FILTER BLOCKED"" - The digital input connected to a fuel filter differential pressure gage (typically a Murphy DP20 series differential pressure gage) is made (active). This indicates that the pressure differential across the filter is too high, and the filter media should be replaced. This is a warning only and will not keep the set from running, however, running a set with a clogged fuel filter will degrade performance, load capacity, and reliability.

 

  1. "FUEL LEAKING" - The digital input connected to a remote fuel leak device is made. (active). This message indicates that there is a fuel leak in the fuel containment basin, and that it is unsafe to start the engine, due to a fire hazard.

 

  1. "FUEL LEVEL HIGH" - This ES (Error Stop) message - the cause of shutdown - indicates that the fuel level exceeded the high fuel level shutdown setpoint.

 

  1. "FUEL LEVEL LOW" - As a warning/status message, this indicates that the low fuel level warning setpoint for the system has been exceeded. As an ES (Error Stop) message - the cause of shutdown - the fuel level exceeded the low fuel level shutdown setpoint.

 

  1. "FUEL PRESSURE HIGH" - This ES (Error Stop) message - the cause of shutdown - indicates that the fuel pressure exceeded the high fuel pressure shutdown setpoint.

 

  1. "FUEL PRESSURE LOW" - As a warning/status message, this indicates that the low fuel pressure warning setpoint for the system has been exceeded. As an ES (Error Stop) message - the cause of shutdown - the fuel pressure exceeded the low fuel pressure shutdown setpoint.

 

  1. "GEN. STEERING CHANGED" - One or more of the digital inputs connected to an auxiliary contact on the users voltage reconnect switch changed states (made or opened) while the set was running. Since reconnecting under load can cause catastrophic equipment damage, any change of state while in any mode other than waiting to start will cause an immediate shutdown and lockout.

 

  1. "GENERATOR NOT READY VLT" - This message indicates that the engine is not ready to start (or to recrank in the case of a false start) because there is an AC speed signal coming into the controller through the energy monitor board that indicates that the AC alternator/engine is still turning.

 

  1. "IDLE BYPASS " - This message indicates that the digital input programmed for this function is active. While in idle bypass mode, the underspeed, underfrequency, and undervoltage warnings and alarms are bypassed, and any relay programmed for idle mode, is active. (For more details, see the section on mechanical engines or electronic engines labeled "Problems with Run/Idle Mode")

 

  1. "IGUARD IS LOCKED IN MANUAL MODE ONLY" - This message indicates that the user setup (or 'profile') has been configured such that there is no AUTO start mode. The unit may only be controlled by the START/STOP keyswitches, or by digital inputs selected to mimic the keypad with user provided switches. The only way to get an autostart mode is to reprogram the iGUARD with the iGCON software tool

 

  1. "KVA LIMIT EXCEEDED" - The total kVA (Volts x Amps) has exceeded the setpoint.

 

  1. "LOAD BYPASS ACTIVE" - This message indicates that the programmable bubble timer is active, and is temporarily disabling overcurrent and kVA shutdowns. The load bypass timer starts timing at the expiration of the warmup timer, and is intended to allow a large block load to be picked up without causing nuisance shutdowns or causing the overcurrent setpoint to be excessive to get past the inrush current requirements to pickup the load.

 

  1. "LOST COMMUNICATION" - This message indicates that while connected to a remote computer through the modem port, the communications were lost and that no changes were saved.

 

  1. "LOW LUBE LEVEL" - This message indicates that the digital input programmed for this function is active. This is an immediate stop, and if active, will not allow the set to start.

 

  1. "MAINT. REQUIRED!" - This message indicates that one or more of the maintenance timers has expired, and the appropriate consumable (oil, oil filter, air filter etc.) needs to be replaced or standard maintenance performed. To reset the maintenance timers see the iGUARD IOM.

 

  1. "MANUAL STOP" - This message indicates that the red manual stop button has been pushed while in the manual or automatic mode.

 

  1. "MANUAL" - This mode means that the controller will only start and stop based on the front panel pushbuttons. It will ignore any remote start demands from either a digital input or from a Modbus register.

 

  1. "MUST BE IN MANUAL FOR LOCAL START!!" - This message is displayed when the manual start (Green) button is pressed while the controller is in AUTO. It is an information only message and does not change any operating modes.

 

  1. "NO CALL TO RUN" - This message is displayed when the remote start demand is removed, and the iGUARD sequences through the normal stopping process.

 

  1. "NO OIL PRESSURE SENDER" - This message is shown on applications with mechanical engines where the controller is not setup correctly. It indicates that no analog channel has been selected for the oil pressure sender. The engine will not start while this message is displayed.

 

  1. "NO TEMPERATURE SENDER" - This message is shown on applications with mechanical engines where the controller is not setup correctly. It indicates that no analog channel has been selected for the engine coolant temperature sender. The engine will not start while this message is displayed.

 

  1. "NO WARNINGS ACTIVE" - This message is shown on the WARNING/STATUS screen when there are no active warnings or shutdowns.

 

  1. "NOT IN AUTOMATIC MODE" - This message is displayed when the iGUARD is not in AUTO mode. NFPA-110 & NFPA-99 require that the not in auto warning trip the common alarm - Alerting the user that the system will not start automatically if it is left as is. The only way to clear this alarm is to put the set back in AUTO or to use the iGCON software tool to disable AUTO mode.

 

  1. "NOT READY TO START" - This message indicates that the engine is not ready to start because it has not wound down to zero RPM/freq since the engine was turned off. This message will self clear when the engine reaches no RPM/freq.

 

  1. "NOTHING LOGGED" - This message is displayed on the SHUTDOWN HISTORY screen when it has been cleared after powerup if it is set to log all events, or if there have been no Error Stops (ES) since the last time it was reset, if the controller is set to log only Error Stops.

 

  1. "OIL FILTER BLOCKED" - The digital input connected to an oil filter differential pressure gage (typically a Murphy DP20 series differential pressure gage) is made. This indicates that the pressure differential across the filter is too high, and the filter media should be replaced. This is a warning only and will not keep the set from running, however, running a set with a clogged oil filter will degrade performance, load capacity, and reliability.

 

  1. "OIL LEVEL LOW" - The digital input connected to the oil level switch (the switch makes when the oil level is too low) is active. As long as this input is active, the engine will not attempt to start, as the engine cannot run safely with no oil.

 

  1. "OIL LEVEL TOO HIGH" - The digital input connected to the oil level switch (the switch makes when the oil level is too high) is active. This is a warning indication only, and will not prevent the set from running.

 

  1. "OIL PRESSURE LOW"" - As a warning/status message, this indicates that the low oil pressure warning setpoint for the engine has been exceeded. As an ES (Error Stop) message - the cause of shutdown - the engine oil pressure fell below the low oil pressure shutdown setpoint.

 

  1. "OIL TEMP. HIGH"" - As a warning/status message, this indicates that the high oil temperature warning setpoint for the engine has been exceeded. As an ES (Error Stop) message - the cause of shutdown - the engine oil temperature exceeded the high coolant temperature shutdown setpoint.

 

  1. "P.F. LIMIT EXCEEDED" - As a warning/status message, this indicates that the power factor limit warning setpoint for the set has been exceeded. As an ES (Error Stop) message - the cause of shutdown - the power factor exceeded the power factor limit shutdown setpoint for longer than the duration of the nuisance timer.

 

  1. "PARAMETERS HAVE BEEN RESET TO FACTORY DEFAULT" - This message indicates that the user has reset the user configuration that was in the iGUARD to the factory default.

 

  1. "POWER FAIL OR UNKNOWN" - This message appears in the SHUTDOWN HISTORY when the system stopped for an indeterminate reason.

 

  1. "POWERED DOWN STANDBY" - This message appears on the iGUARD display when the low power standby is active (The standby timer is both enabled, and has counted down to zero) The iGUARD turns the power off to as much of itself as it can (including the blue LED backlight on the display) and waits for a remote start contact. If it receives a remote contact it immediately turns everything back on and initiates a start sequence. If the system needs to be started manually from the standby state, the user will have to press the start button twice - once to 'wake up' the controller, and then again to start it.

 

  1. "PRESS ACK/ALARM AGAIN TO RESET IGUARD" - This message is specifically to let the user know that if they want to reset the iGUARD after a fault (Error Stop) shutdown, they must press the acknowledge alarm key again to return the iGUARD to a state where it can run.

 

  1. "REVERSE POWER DETECTED" - This message indicates that all the CT's are wired the same, but that they are reversed with respect to forward AC current flow OUT of the generator.

 

  1. "REVERSE POWER PHASE A" - This message indicates that the CT for this one phase is either truly flowing backwards (NOT likely!), the CT is reversed with respect to the other two, or there is a problem with the order of the CT's or the voltage connections.

 

  1. "REVERSE POWER PHASE B" - This message indicates that the CT for this one phase is either truly flowing backwards (NOT likely!), the CT is reversed with respect to the other two, or there is a problem with the order of the CT's or the voltage connections.

 

  1. "REVERSE POWER PHASE C" - This message indicates that the CT for this one phase is either truly flowing backwards (NOT likely!), the CT is reversed with respect to the other two, or there is a problem with the order of the CT's or the voltage connections.

 

  1. "RUN TO DESTRUCT" - This message indicates that a digital input programmed for control of the run to destruct function is active. There is a trace that also must be cut to enable this. This mode of operation disables all shutdowns, allowing the unit to be used in applications where a "Battle Short" or "Run to destruction" mode is required.

 

  1. "STANDBY IN>" - This message show the remaining time on the standby timer. When the timer reaches zero, it will cause the iGUARD to enter the "POWERED DOWN STANDBY" mode. (See that entry for more details.

 

  1. "STARTUP BYPASS TIMER" - This message shows the time remaining that the warnings and shutdowns typically active when starting a set are ignored.  After this timer reaches zero, any shutdowns and warnings will perform normally.

 

  1. "STOP PRESSED" - This message indicates that the red STOP button has been pressed and the iGUARD will go through a shutdown sequence.

 

  1. "YOU NEED HIGHER ACCESS LEVEL" - This message is displayed when the user is attempting to do or change something and they do not have a high enough password.

 

  1. "RESETTING IGUARD" - This message is displayed when the user has pressed ACK / ALARM after an Error Stop (ES) to get the unit back into a mode where it can be started.
     

J1939 Suspect Parameter Number (SPN) Displays

In cases where the iGUARD is connected to an ECU equipped engine, the iGUARD will show of text-translated active fault code (FM1) messages for both warnings and shutdowns. These are taken directly from the J1939 standard and the SPN (Suspect Parameter Number) for the 'standard' messages that the iGUARD displays are below:

 

 1. "SPN:"

 2. "ENGINE SPEED",

 3. "BATTERY VOLT. SWITCHED",

 4. "FUEL DELIVERY PRESSURE",

 5. "FUEL LEVEL",

 6. "ENGINE OIL LEVEL",

 7. "ENGINE OIL PRESSURE",

 8. "ENGINE COOLANT TEMP.",

 9. "ENGINE - PERCENT TORQUE",

10. "ENGINE - STOP LAMP",

11. "ENGINE - WARNING LAMP",

12. "ENGINE - PROTECT LAMP",

13. "ENGINE- MALFUNCTION LAMP",

14. "ACCEL. PEDAL POS.",

15. "COOLANT LEVEL",

16. "NO MESSAGE AVAILABLE",

 

J1939 Failure Mode Indicator Number (FMI) Displays

In cases where the iGUARD is connected to an ECU equipped engine, the iGUARD will show of text-translated active fault code (FM1) messages for both warnings and shutdowns. These are taken directly from the J1939 standard and the FMI (Failure Mode Indicator) for the 'standard' messages that the iGUARD displays are below:

 

 1. "FMI:",

 2. "J1939 MESSAGES [] ",

 3. DATA VALID BUT ABOVE NORM. OPERATIONAL RANGE- MOST SEVERE LEVEL",

 4. DATA VALID BUT BELOW NORM. OPERATIONAL RANGE- MOST SEVERE LEVEL",

 5. "DATA ERRATIC, INTERMITTENT, "R INCORRECT",

 6. "VOLTAGE ABOVE NORMAL OR SHORTED TO HIGH SOURCE",

 7. "VOLTAGE BELOW NORMAL OR SHORTED TO LOW SOURCE",

 8. "CURRENT BELOW NORMAL OR OPEN CIRCUIT",

 9. "CURRENT ABOVE NORMAL OR GROUNDED CIRCUIT",

10. "MECHANICAL SYSTEM NOT RESPONDING OR OUT OF ADJUSTMENT",

11. "ABNORMAL FREQUENCY OR PULSE WIDTH OR PERIOD",
"ABNORMAL UPDATE RATE",

12. "ABNORMAL RATE OF CHANGE",

13. "ROOT CAUSE NOT KNOWN",

14. "BAD INTELLIGENT DEVICE OR COMPONENT",

15. "OUT OF CALIBRATION",

16. "SPECIAL INSTRUCTIONS",

17. "DATA VALID BUT ABOVE NORM. OPERATIONAL RANGE - LEAST SEVERE LEVEL",

18. "DATA VALID BUT ABOVE NORM. OPERATIONAL RANGE - MODERATELY SEVERE LEVEL",

19. "DATA VALID BUT BELOW NORM. OPERATIONAL RANGE - LEAST SEVERE LEVEL",

20. "DATA VALID BUT BELOW NORM. OPERATIONAL RANGE MODERATELY SEVERE LEVEL",

21. "RECEIVED NETWORK DATA IN ERROR",

22. "RESERVED FOR SAE ASSIGNMENT",

23. "NOT AVAILABLE OR CONDITIONS EXIST",

 

 

 
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