40 Psi Or More/Isolate Valve #78 - Fresenius Medical Care 2008T Troubleshooting Manual

F- 9.0.27 40 PSI OR MORE / ISOLATE VALVE #78
Turn the machine OFF!
a)
b) Replace Valve #78* with a known good!
*To LOCATE Valve #78 refer to the Figure previous page.
c) Enter Service Mode → Calibrate Hydraulics → Flow Pressure.
d) Press 'Enter' THEN ENSURE the FLOW MOTOR shaft is rotating!
e) Can you adjust the new Valve #78's screw to a gauge pressure of between 35 and 36 psi (Yes or No)?
Yes Pressure adjusts to between 35 and 36 psi! Figure
right, if Valve #78's screw is turned so that no threads
are visible TWO (2) possible bad components: 1) Bad
Flow Pump head OR; 2) Bad Flow Pump motor
(possibly brushes).
No CANNOT adjust to between 35 and 36 psi! TWO (2)
possible bad components: 1) Bad Flow Pump head OR;
2) Bad Flow Pump motor (possibly brushes)
.
LEFT BLANK INTENTIONALLY
2008T Troubleshooting Guide
P/N 490292 Rev. A
Page 104