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iGUARD Troubleshooting
Total system:- Controller is blank or "dead"
- Controller loses its settings
- Controller resets or goes off during crank
- Controller won't go into AUTO mode
- Keypad sluggish or hard to operate
- Keypad is too sensitive
- Keypad isn't working
- Display won't show anything, but unit appears to be functional otherwise
- Display scrolling speed too slow/fast
- Display won't scroll
- Stopping display from scrolling
- Shows too many/not enough parameters
- Backlight won't quit flashing
- Backlight won't come on
- Audible annunciator turn off/turn on
- Controller needs updating
- Resetting the controller after an error shutdown
- Troubleshooting digital inputs
1. Controller is blank or "dead"
a. Check that J1 (power plug) is fully inserted into the receptacle - Easiest method is to unplug and re-plug. Should be able to feel a slight click when the connector seats and latches.
b. Check operation of any system power switches - Easiest method is to toggle them a couple of times and measure the DC voltage.
c. Check any fuses with an Ohm meter for continuity - Sometimes fuses look fine but are blown under the end cap. The only way to be sure is to physically check continuity with an Ohm meter.
d. Check operation of any system circuit breakers with voltmeter - Many circuit breakers are only designed to function at rated current/voltage for a single operation. Some inexpensive "self resetting" breakers won't reset, if the overcurrent event was sufficiently large. If the circuit breaker has tripped:
i. For some types of thermal breakers, it may take as much as a couple of minutes to cool down enough to reset.
ii. Verify that the circuit breaker will reset and latch in an operating position.
iii. Verify that there is not a large voltage drop from the circuit breaker by measuring the DC voltage across the circuit breaker itself. There should be no more than a few millivolts.
e. Check that the RED wire is on +V battery and the BLACK wire is on -V battery - Reversed polarity on the power connections will cause no harm, but the controller will not operate.
f. Verify that the wires between the battery and the controller are not cut, broken, or crushed.
g. Check that any power connectors - ¼" quick connects, circular quick connects etc, crimp terminals, and screw terminals - are fully seated.
h. Check that the cranking battery voltage is at least nominal for the system:
i. 12V system - battery should be at least 10VDC
ii. 24V system, Battery should be at least 18VDC
i. Check that the battery ground terminal(s) are connected
j. Check that any crimp terminal is actually making connection. This will require a firm physical tug on each wire crimp to check.
2. Controller loses its settings - If the controller will not maintain it's user settings, please contact the technical services group at Murphy. (918) 317-4100
3. Controller resets or goes off during crank
a. Check that the cranking battery is charged properly
i. 12V system - battery should be at least 10VDC
ii. 24V system, Battery should be at least 18VDC
b. Check that battery voltage is not falling below 5VDC for longer than 100mS.
c. Check that battery voltage is recovering to a minimum of 6V during operation
d. Check that the controller supply wires are tied directly to the battery posts and NOT to the starter motor - Large cranking currents cause voltage drops across the battery cables, which can easily cause the available supply voltage to fall below the minimum operating voltage
e. Check that the battery is sized for the starter motor current requirements
f. Check that the battery does not need maintenance
g. Check that the battery is not defective (bad cell)
h. Check that the battery charging alternator is being excited, and that it is producing a battery charging current in operation.
4. Controller won't go into AUTO mode
a. Has controller been programmed for "Manual mode only"? (NO auto mode allowed)
b. Is security level set to make mode change impossible?
c. Is there a digital input programmed for AUTO/MAN selection? (This always over-rides the front panel)
5. Keypad is sluggish or hard to operate
a. Make sure that the center of the finger is pressed on the center of the button. Keypad operation is based on touch technology, and that is based essentially on the area of the finger that covers the correct (outlined) area of the keypad.
b. If the keypad seems slow, remove your finger, count slowly to three and try again. If the keypad chip is self calibrating it will take a couple of seconds to clear
c. Increase the sensitivity of the keypad setting
6. Keypad is too sensitive - Decrease the keypad sensitivity
a. If the keypad works seemingly intermittently - try removing your finger for a slow count of three and then try again. If the keypad chip is in the process of self calibrating it can occasionally seem to quit working. This gives it time to clear and operate properly
b. The keypad will not operate with a tool - screwdriver tips, sticks, etc. - but only with an actual fingertip.
c. Cycle power
d. If the system still won't respond at all, please contact the Murphy technical services group (918) 317-4100
8. Display won't show anything, but unit appears to be functional otherwise
a. Touch a key on the keypad. Does the unit come up and display? It could be in low power sleep mode.
b. Is the temperature below -20C? If so, the LCD display may be too cold to display anything.
c. The unit may be configured for zero power mode. The remote start contacts also supply power to turn the controller on, so the controller will be non-responsive without that signal.
d. Is the backlight on or flashing? If so and there are no text/graphics, then please contact the Murphy technical services group (918) 317-4100
9. Display scrolling speed too slow/fast
a. Press ENTER and NEXT at the same time. The top line of the display will change to temporarily show the scrolling rate
b. The selections are 4 sec, 8 sec & 12 sec.
a. Press ENTER and NEXT at the same time. The top line of the display will change to temporarily show the scrolling rate
b. The display will not scroll unless it is on the parameters screen. Press NEXT (or BACK) until a screen that shows the parameters as 3 parameters x 3 parameters , a 2 parameter x 2 parameter, or a single parameter is on-screen.
11. Want to stop display from scrolling - Press EXIT & NEXT keys at the same time to turn scrolling OFF
12. Shows too many/not enough parameters - The only way to adjust how many parameters are shown is with the iGCON tool. This allows the user to select how the data is displayed.
13. Backlight won't quit flashing - The system is either currently in alarm, or there is at least one unacknowledged latching alarm. Press the "ACK ALARM" key. The flashing should stop, unless the system has shutdown on a fault. Then you should see a message to press the ACK ALARM key twice more to reset the controller.
a. Check that the backlight is not disabled in the controller setup
b. Still off? Please contact the Murphy technical services group (918) 317-4100
15. Audible annunciator turn off/turn on - If the audible annunciator is wanted/needed and it is not sounding, or if it is sounding and it is not wanted, check the setup to enable/disable the on-board audible annunciator
16. Controller needs updating - See the section on communications
17. Resetting the controller after an error shutdown
a. Press the "ACK ALARM" key three times - The display will indicate that you must press the acknowledge key some number of times to cause a reset.
b. Cycle power to the controller (OFF, wait a few seconds and then back ON)
18. Troubleshooting digital inputs - The fastest way to see if something is working is to get into the I/O test screen
a. Are the commons for the digital connectors (pin 1 of J5 and J6) tied to +V battery?
b. Is there a physical connection between the digital input and the device that is supposed to activate it?
c. Is the device actually providing a ground connection when active?
d. Is the Molex® connector seated with the mechanical latch made?
e. Is the wire inserted fully in the Molex® connector?
f. Is the iGUARD programmed properly? This can be verified by entering a password that will allow access to the level 3 (or higher) parameters. (Default is PAS3 - Check your documentation!), and then navigating to the Operating Parameters Screen. Once there, use the UP/Down arrows to navigate to the "I/O TEST" menu item, and press enter.
i. Using the left/right/up/down arrows, scroll through the displays until you see "Digital inputs" and then use the UP/DOWN arrows until you see one that is labeled for the function you are wanting. (for instance digital input 1 is defaulted to OVERSPEED) Use a jumper wire to make the input to the iGUARD go to ground.
ii. Look at the I/O test screen for digital input 1. It should be reading "1" when ground is applied to the input.
iii. If the input state does not change then there is a wiring error between the switch and the controller.
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