Troubleshooting
03/07/03
4-11
Quantity shows on 9800A displays but fuel management system records incorrect or zero
quantity. This problem pertains only to 9800A’s connected to non-CFN fuel management
systems.
Possible Cause
Checks
Corrective Action
Pulser output rate switches
don’t match system pulser
rate.
Check the settings of SW2-1
through SW1-4 on the CPU
PCB.
Change the CPU PCB switch
settings or change the fuel
management system pulser
rate accordingly.
NOTE: Changing the pulser
rate switches may require
replacement of your Weights
and Measures seal.
Fuel management system
pulser input circuitry not
compatible.
The 9800A requires the fuel
management system to "pull
up" the pulser signal to a DC
voltage between 5VDC and
24VDC.
Call GASBOY Technical
Service for assistance.
Defective CPU PCB.
Using an oscilloscope, check
the signal between GND (TP2)
and the following pins of P2 on
the pump I/F PCB.:
Pin 5-Side 1 1000:1;
250:1, international
Pin 6-Side 2 1000:1;
250:1, international
Pin 10-Side 1 below 1000:1;
below 250:1 international
Pin 11-Side 2 below 1000:1;
below 250:1 international
Replace the CPU PCB if a
+5VDC square wave signal is
not measured on the
appropriate pins.
NOTE: Replacing the CPU
PCB may require replacement
of your Weights and Measures
seal.
Defective Pump I/F PCB.
Using an oscilloscope, check
the signal between GND (TP2)
and P1 pin 1 (side 1) or P1 pin
2 (side 2) on the pump I/F
PCB.
Replace the Pump I/F PCB if
the pulser signal is not
measured on the appropriate
pins.
Replace the power supply if
0VDC is measured on both
sides of F1 or F2.
Summary of Contents for 9800A Series
Page 8: ......
Page 11: ...Chassis Wiring 03 07 03 2 3 115VAC 60 CYCLE PUMP WIRING...
Page 12: ...GASBOY Series 9800A 2 4 03 07 03 115VAC 60 CYCLE DISPENSER WIRING...
Page 13: ...Chassis Wiring 03 07 03 2 5 230VAC 50 CYCLE PUMP WIRING...
Page 14: ...GASBOY Series 9800A 2 6 03 07 03 230VAC 50 CYCLE DISPENSER WIRING...
Page 15: ...Chassis Wiring 03 07 03 2 7 115VAC 60 CYCLE FRONT LOAD OPTION PUMP WIRING...
Page 16: ...GASBOY Series 9800A 2 8 03 07 03 115VAC 60 CYCLE FRONT LOAD OPTION DISPENSER WIRING...
Page 17: ...Chassis Wiring 03 07 03 2 9 230VAC 50 CYCLE FRONT LOAD OPTION PUMP WIRING...
Page 18: ...GASBOY Series 9800A 2 10 03 07 03 230VAC 50 CYCLE FRONT LOAD OPTION DISPENSER WIRING...
Page 19: ...Chassis Wiring 03 07 03 2 11...
Page 20: ......
Page 39: ...Electronic Head Assembly 03 07 03 3 19 Connectors Relay Drive Pump Motor Power...
Page 60: ......
Page 65: ...Replacement Instructions 03 07 03 5 5...
Page 72: ...GASBOY Series 9800A 5 12 03 07 03...
Page 75: ......
Page 76: ...APPENDIX PARTS LIST...
Page 77: ......