Gasboy Gilbarco Interface Unit - Manual (Page 29)

Gilbarco Interface Unit v2.1 Installation 21
Gasboy CFN Series
Initial power-up and checkout
Perform each step in order. If you get an incorrect result at any time, correct the cause before
proceeding to the next step.
Power up
With the interface unit connected to the pumps and the pumps turned on, apply power to the
interface unit and observe the lamps visible through the window on the front of the interface
unit.
Lamp check
Two green lamps (DC and BOK) on the lower board in the interface unit should be lit. The red
lamp (BAD) on the lower board should not be lit.
If no lamps are lit, the power supply is not delivering correct power. If the red lamp (BAD)
is lit, wait about a minute.
If it does not go out, the battery on the lower board is bad, the battery jumper is out, or the
battery fuse is blown. Correct the condition and try again.
Now the red light should be out, and the green light next to it should be on.
DC power check
The DC power OK lamp, to the left of the battery OK lamp, should also be lit. Even if it is, check
the DC voltage at CPU board P9 pins 1 and 64. This should be 5.00 to 5.05 volts. If the voltage
is not within these limits return to the factory.
If the leftmost green lamp still does not light, adjust the DC power fail potentiometer on the
lower board. This adjustment may be facilitated by powering down the unit, removing the three
screws on the bottom that secure the circuit boards, and raising the two boards as a unit until a
screwdriver may be inserted into the adjusting shaft. Take care not to short the bottom of the
current loop board to the case when you apply power. Alternately, you may use a small offset
screwdriver.
Turn the potentiometer clockwise 1/4 turn then cycle power ten times using the switch on
the back panel of the unit. The green LED should come on eight or nine out of ten tries. Repeat
the adjustment until it does.
If the LED comes on at each of the ten tries, back the potentiometer off a little until you are
able to get it to come on just eight or nine out of ten tries.
When you have completed the preceding, turn the screwdriver shaft 1/3 of a turn clockwise.
Remove power and fasten the boards back into the unit, then apply power again.
Remaining interface lamp check
L9 to L12 should now all be off. If L12 alone of these is on, you have omitted K7 on the CPU
board, or else U8, MID400, is burned out. Correct this. If lamps from L9 to L11 are on, the
current loop interface needs repair.Note which of L9 to L12 were lit and report this to phone
support. Chapter 3 Hardware, has some information about the meanings of lamps L9 to L12,
under "Front panel CPU LEDs" on page 32.
At this point, you should see blinks on L1 and L5, nothing on L2-L4, L6 lit, and L7 and L8
indicating current loop status. A connected current loop will cause its associated lamp to blink.
Universal distribution box lamp check
Check the lamps in the Gilbarco distribution boxes according to Gilbarco instructions.