Xerox Phaser 8400 Service Manual page 186

Check Menu Value Key Table (Continued)
1 Start Power
(watts)
2 Initial Pumping
Power (watts)
3 Max Pressure
Pumping Power
4 Pumping Time
To Max(sec)
5 No Pressure
Pumping Power
(watts)
6 Pressure Decay
Time (sec)
General Troubleshooting
Reports initial peak pumping
power after pump power on.
This reflects the inrush current
to the pump motor. An unusual
value could indicate a defective
motor (windings/brushes/etc.).
Reports minimum pumping
power after start up peak (R1).
This is the first value to reflect
the system pressure. If the
volume is normal (hose/
printhead), then the drop is
large and the pressure rises
slowly. If the volume is small
(hose pinched plugged near the
pump), then the drop is minimal
and the pressure rises quickly
Reports average pumping
power just before maximum
pressure is reached. May
indicate the efficiency of the
pump, leaks, and/or the setting
of the pressure relief valve.
Reports the time from pump on
until the pressure relief valve
opens. May indicate the
conditions discussed in R3, as
well as the system volume.
Reports the average pumping
power after the pressure has
fully decayed. May indicate
pump motor condition/efficiency.
Reports the time between purge
valve opening and the point
when the pumping power
(relative to the current
pressure), fades back into the
ripple of the no pressure
pumping power ( see the R5
discussion above). This time
could indicate the operation of
the purge valve and the
condition of the bleed orifice
(plugged, etc,).
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