Fresenius Medical Care 2008K Troubleshooting Manual page 194

d) Referring to the Figure (right), check through the clear
concentrate input tubing for large air bubbles. If air is seen
this may be the problem!
e) THOROUGHLY (use a flashlight) check for external water
leaks, inside the hydraulic drawer, and the entire length of
the external dialysate lines all the way to where they
connect at the rear of the machine. If a leak is located this
is probably the problem!
f) Referring to the Figure (below right), check the external flow
indicator for scoring (the inner tube appears cloudy) that may
restrict flow and cause pressure failures. Normally the tube is
very clear. If (and ONLY if) scoring is located repair or
replace the flow indicator as this may be the problem.
g) See procedure number
PHT- 1.0.4 CHECK STATIC UF OUTPUT
a) Referring to Figure 72
Fluid Sample Connector from the Fluid
Sample port. Two checks for external water
leaks:
1. If (and ONLY if) leaking from the Fluid
Sample Connector rebuild the UF Pump
AND replace check valve #63 (yellow
insert). A leak from the Fluid Sample
Connector may be the problem!
2. If (and ONLY if) leaking from the male Fluid Sample port, check valve #64 (orange insert) is bad. A
leak from the Fluid Sample port may be the problem! If (and ONLY if) no leaks from the
Connector or port see part b.
b) See procedure number
PHT- 1.0.4 (page 192).
(page 192), remove the
PHT- 1.0.5 (page 193).
Figure 72 – UF Fluid Sample / Check Valves
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
Section 10 – Pressure Tests Failing
Page 192