2008T Troubleshooting Guide
P/N 490292 Rev. A
TMP- 4.2.0 ISOLATE SECONDARY CIRCUIT
a) Open the shunt door to close valve #24 and #25. This isolates the external dialysate lines (see Figure
71 C (below)).
b) Attempt to achieve -250 mmHg then clamp the syringe tubing. Can you achieve -250 and HOLD it
(+/- 15 mmHg per minute) now?
Yes -250 mmHg achieved and HOLDS! Proceed to
page 511, procedure number TMP- 4.4.0.
No -250 cannot be achieved and / or held! See procedure number TMP- 4.3.0 (page 510).
Figure 71 C - Isolation Area
(excludes dialysate lines)
TMP- 4.3.0 -250 LEAKING / ISOLATE DIALYSATE LINES
a) Trace the to and from dialyzer lines to where they attach to the rear
of the machine.
b) INSIDE the machine, clamp the clear (non-braided) tubing, at BOTH
dialysate line connectors.
c) Can you achieve -250 mmHg and HOLD it (+/- 15 mmHg per minute)
now?
Yes -250 mmHg achieved and HOLDS!
IMPORTANT! Remove the clamps then see
procedure number TMP- 4.4.0 (page 511).
No -250 cannot be achieved and / or held! FIVE (5) possibilities, 1) Leaking dialyzer quick
connectors and/or O-rings; 2) Leaking external flow indicator fittings; 3) Leaking optional
fluid sample port; 4) Leaking dialyzer line connections at the rear of the machine;
5) Leaking external dialysate line filter O-ring/housing.
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