SwitchGauge troubleshooting.cdr
Contents
1. This could be a bad earth on sender signal wire 4 IF NO OPEN CIRCUIT FOUND TEST THE OHMS DIRECTLY ON THE SENDER TERMINALS if an ohms reading is obtained the float may have fallen off the sender or the float may be caught on a baffle or the wiring to the switch is faulty If no ohms found at the sender it is a faulty sender and will need to be removed to check the above symptoms NOTE if tank is definitely full but an empty reading of 2 5 ohms found float may be damaged and sitting on bottom of tank NOTE If gauge reading does not move or change after transferring or adding fuel the sender float arm may be caught on internal baffling or the sender itself maybe damaged For More Information On Products Features Faq Visit www thelongranger com au Long Range Fuel and Water Tanks gt THE LONG RANGER THE BIG TANK FOR A BIG COUNTRY YELLOW GREEN LED PUMP LIGHT FUEL GAUGE PUSE SWITCH X RED LIGHT FLASHED WHEN Inbuilt testing for an intermittent signal a If after reading the auxiliary tank level for around 10 minutes the unit is unable to obtain an in range reading from the sender it will presume the sender is faulty and flash the display at the rate 2 5 seconds on 0 5 seconds off While in this fault warning mode the unit will remain displaying the last good reading it was able to obtain The fault mode flashing will stop if a good signal becomes available If the unit detects a faulty sender at the time of switc2. 10 Ohms Red Lamp On gt 10 Ohms lt 300Ohms 1 Green Lamp On gt 20 Ohms lt 50 Ohms 2 Green Lamps On gt 50 Ohms lt 70 Ohms 3 Green Lamps On gt 70 Ohms 4 Green Lamps On For More Information On Products Features Faq Visit www thelongranger com au
3. Long Range Fuel and Water Tanks LN j d Tana TETRA con ZN TESTING PROCEDURE PAGE 1 YELLOW PUMP LIGHT GREEN LED FUEL GAUGE PE SWITCH X SWITCH GAUGE BASIC OVERVIEW B With ignition turned on the LED bar graph will be light red when empty amp green when tank is full To turn pump on push the button yellow indicator will illuminate only when on Note If button does not push in correctly the 20mm mounting hole maybe a little tight Note When tank nearing dead empty the red light will flash while the switch is in the on position This indicates to the user that transfer is complete and the pump needs to be turned off The switch has the following built in features Automatic Dimming Surge Damped and Low level warning If no lights come on check switch power connections Is 12v being supplied to fuse and switch Is earth wire from switch connected correctly If connections are OK switch may be faulty TRANSFER PUMP OPERATION Once power confirmed to the switch press the push button to activate the transfer pump The yellow pump light will be illuminated and you will here the transfer pump If pump is working but not pumping check direction of fuel flow on outlet If transfer pump is not activated check transfer pump power connections Is 12v being supplied to pump Is earth wire on pump connected correctly If connections are correct but pump still not working pump may be faulty connect direct to battery to c
4. h on it will display the normal low level flashing of the red lamp and then flash the fault signal i e 2 5 seconds on 0 5 second off after approximately 10 minutes if a good signal is not obtained Inbuilt test to determine if the switch is faulty In order to check the circuitry and microprocessor operation a factory test can be initiated by connecting a 180 Ohm resistor from the White wire to ground instead of the 0 90 Ohm sender and cycling the Red wire from Off to On In this test mode each lamp will cycle on one at a time with full brightness including the Amber lamp staying on for about one second When this step is complete all the lamps will come on under dimming control to allow the operator to test the dimming function by shining a light into the sensing window beneath the pushbutton or else blocking ambient light entering the same window After a further five seconds the unit will switch to normal operation The LongRanger Switch Gauge Specification Part Number ELSWGAONOFF12V05 Power Supply Voltage 8 to 18 volts DC Normal Operating Current 85mA DC max not including the switch load Operating Temperature 20 C to 85C Switch Current Rating 5A DC Circuit Breaker Trip Current 8 5A DC Resistive Sender Input 0 90 Ohm Typical Optional Voltage Input 0 5 Volts or 0 12 Volts Factory Calibration Resistive Sender Calibration 0 90 Ohm Resistive Calibration Nominal switch points lt 5 Ohms Red Lamp Flashing gt 50hms lt
5. onfirm 4mm Sheathed Wire 5 Amp Inline Fuse a a a E a Rice Joiner Termina T m m y Bue Joiner Terminal gt J Connect to ignition I 9 eseeeeefonen 4 lt Yellow White power source 12v a I 12 volt signal wire gt Blue ScotchLok Terminal A 1 I or solder From auxiliary tank ft and fuel filter 1 3 VDO auxiliary tank Earth point I I gauge sender Blue 6mm Eye Terminal Fuel pump lt Red Femal I xS Spade Terminal Brown gt I earth I lt Red Male I Black_y h Spade Terminal ame earth en ne i amp Red Female lt To transfer junction Spade Terminal For More Information On Products Features Faq Visit www thelongranger com au Long Range Fuel and Water Tanks 3 THE LONG RANGER THE BIG TANK FOR A BIG COUNTRY YELLOW GREEN LED PUMP LIGHT FUEL GAUGE PE SWITCH X LED GAUGE OPERATION APPROX SLITRES LEFT A short delay 0 5 seconds after powering switch gauge the bar graph display will instantly indicate the fluid level in the auxiliary tank Once the unit is on and displaying fluid quantity the gauge movement is damping so that the display is not susceptible to surge with spasmodic movement of the fuel If it is required to test the fluid quantity sender at different scale positions it will be necessary to cycle the power to the unit from Off to On to get an instant reading or else wait about 2 5 min
6. utes for the gauge to acquire the new reading At very low fluid quantities where the sender inputs a value of 10 Ohms the red light will display At 5 Ohms or less the display will flash continuously 0 5 seconds off 0 5 seconds on as a final low quantity warning while transferring fuel Night Time Dimming function Shining a torch into the small window beneath the push button when the ambient light is low can test the dimming function This will cause the display brightness to step up to the maximum Blocking light to the same window in high ambient light conditions will cause the display to dim down If gauge stays on empty 1 IS THE GAUGE WIRED CORRECTLY AS PER THE DIAGRAM It is possible to have an empty light with the sender incorrectly connected 2 CHECK WHITE AND BLACK WIRES AT SWITCH PLUG FOR CONTINUITY If tank empty there should be a reading of approx 2 5 Ohms If tank full there should be approx 90 Ohms lf an ohms reading found the gauge could be faulty the float may have fallen off the sender or the float may be caught on a baffle or it could be a bad earth for switch If the sender is suspect it will have to be removed to check the above symptoms If the gauge is suspect it can be tested by using another working sender if available or a resistor up to 90ohm or the inbuilt factory test below using a 180 Ohms resistor a resistor is available from dick smith for under 50cents 3 IF NO OHMS READING CHECK WIRING FOR OPEN CIRCUIT
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