FloTech Programmable CheckMate Retain / Overfill Monitor
16 10466 REV N FT208 CheckMate
System will not load and one or more RED sensor LEDs are lit in the inactive
compartments:
Follow these instructions for top or bottom sensors.
1.
Remove onboard monitor cover.
2.
Check the sensor inputs on TB3 and TB4 that are not being used (inactive sensor inputs). Make sure
there are no wires connected.
3.
Go to the PROGRAMMING section of this manual and repeat this procedure, making certain to
accurately program the unit.
4.
If the monitor still does not function properly, contact FloTech Technical Service for further
instructions.
System will not load and one or more RED sensor LEDs are lit in the active
compartments:
Follow these instructions for top or bottom sensors.
1.
Remove onboard monitor cover.
2.
Go to TB3. Remove sensor wire from the terminal block that corresponds with the lit LED. Example:
If LED TOP #3 is lit, remove the sensor wire to terminal T3 (RED).
3.
Select a compartment where the LED is NOT lit and exchange that wire with the suspect wire.
Example: exchange failed sensor wire TOP #3 (RED) with the working TOP #2 wire (GRN).
4.
If the lit sensor LED does not move to the new position, the monitor is defective. Example: LED TOP
#3 top stays lit after the sensor wires are switched. Replace the onboard monitor chassis with a FloTech
model FT207 replacement chassis.
5.
If the lit sensor LED moves to the new switched compartment, the problem is with the sensor or wiring.
Example LED TOP #3 go out and LED TOP #2 lights, return the wires to the original positions.
6.
Open all the sensor caps and check each wiring connection. Look for pinched wires that may short the
sensor signal to ground. Also, look for defective crimp connections.
7.
Measure voltage across the failed sensor wires (Black to Red). Voltage should measure 8-10 VDC.
8.
If steps 6 and 7 check OK, replace the sensor with a FloTech FT150.
NOTE: A quick test of the sensor can be accomplished by connecting the sensor directly to the onboard
monitor. Example: Remove sensors wires from monitor ground (WHT) and the TOP sensor 1 (BRN) and
connect the sensor to be tested. If the sensor is good the RED TOP #1 LED with NOT light. If the sensor is
defective the Diagnostic LED WILL light.
System will not load, has no green AUX LED and no green PERMIT LED, power
LED is lit and no red sensor LEDs are lit.
1.
Check the TB2 AUX input. This input must have a closed switch or jumper connected to allow the
monitor to load. The AUX input has its own green LED. This LED must be lit to send a permissive
signal to the load rack.
2.
Check to see if a jumper is connected to TB2 AUX. If TB2 AUX has no connections, add a jumper.
3.
If TB2 AUX has a wire connection, follow the cable to the switch. This switch is typically connected to
a vapor recovery interlock or to a brake air lines interlock. Activate the switch and see if the AUX green
LED is lit. If not repair the air switch. If the air switch appears OK, then check the monitor by
installing a jumper wire to force the AUX LED on. If the Aux LED can’t be forced on, then replace the
monitor.
