Gasboy CFN Series Diagnostic Manual - Manual (Page 220)

GASBOY CFN Series
6-30 12/26/02
PUMP CONTROL UNIT PROBLEMS
NOTE: PPC CPU board is a generic term used in the following section to describe the CPU
board found in the pedestal pump control unit. The more specific names of CMOS Pump
Control CPU board and EXPMUX CPU board will be used when required.
Pump Control Unit is Dead. No LED's lit.
Possible Cause Checks Corrective Action
No AC power to Pump
Control Unit. Check if the PPC breaker is
off or tripped.
Check if 115VAC is being
switched through PPC
breaker.
Check if 115VAC is measured
at the PPC TB202 terminal
block.
Turn the breaker on, if off.
Replace breaker if 115VAC is
not being switched.
Repair wiring problem
between electric panel and
PPC is no voltage is
measured.
PPC power switch is off. Check if the PPC power
switch is off. Turn the PPC power switch
on, if off.
Blown fuse. Check if the 1 amp fuse on
the PPC power supply
assembly is blown Replace fuse, if blown.
Defective power supply. Check the LED's. If not lit,
measure the power supply
voltages at the P1 connector
on the PPC Motherboard
between pin 5 (DC ground)
and pins 1 (+5VDC), 2
(+12VDC), and 4 (+5VDC). Replace the PPC Power
Supply PCB if the proper
voltages are not measured.