Gasboy 1000 Series FMS Diagnostic Manual - Manual (Page 134)

Replacement Instructions
03/07/03 7-15
REPLACING A PUMP OVERRIDE SWITCH
WARNING
To avoid electrical shock and possible equipment damage you
must turn off the circuit breaker which provides system power as
well as the circuit breakers for all attached pumps/dispensers.
Remove Old Switch
1. Locate the relay module in the Series 1000 post which contains the inoperable pump override
switch.
2. Record the positions of all field wiring as it is attached to the Pump Power Terminal Block of
the relay module. Label any unmarked or common colored wires to make them easily
identifiable later.
3. Disconnect all of the field wiring from the Pump Power Terminal Block by loosening the
screws and removing the wires.
NOTE: If there is enough slack in your field wiring, you may not need to disconnect all the
wiring.
4. Locate the two mounting screws (one at each end of the relay module). Loosen the
mounting screws until the relay module may be pulled forward and away from the mounting
bracket.
5. There are four relay drive wires (red, violet, orange, and black) attached to the relay module.
Loosen the screw on each relay until the relay drive lines may be removed.
6. Locate the inoperable pump override switch on the relay module. Begin sliding the wires off
the switch by pulling them back towards the relays. Be sure to note the wire positions so you
can re-attach them correctly to the new switch.
7. Locate the retaining ring on the front of the switch. Grasp it firmly and turn it
counterclockwise until the ring is removed from the switch. Remove the switch by pulling it
out of the rear of the bracket.
Install New Switch
8. Insert the new switch and turn the retaining ring clockwise to secure it.
9. Attach the six wires to the switch by sliding the wire terminals firmly onto the switch contact
lugs.
10. Attach the four relay drive wires to the relay module. See page 3-6 for proper positioning of
wires.
11. Position the relay module into the vacated slot of the mounting bracket lining up the mounting
screws with holes in the mounting bracket. Tighten the mounting screws until the relay
module is secure.
12. Attach all field wiring to the proper positions of the Pump Power Terminal Block. Use the
positions that were recorded in Step 2.