Fresenius Medical Care 2008K Troubleshooting Manual page 197

PHT- 4.4.0 AUTOMATED VALVE LEAK TESTS ON VALVE #24 AND #25
Valve #24 and/or #25 may be leaking internally:
a) Enter Service Mode
b) Select the [Valve Number] data box. It turns bright yellow. Use the up/down arrow keys (K machine) or
2
+/- keys (K machine) until the [Valve Number] data box = Valve #24.
c) Press the 'CONFIRM' key to begin the tests. When complete read the [TEST STATUS] box:
"Failed": Repeat the test. If (and ONLY if) the valve fails again two possibilities: 1) Bad actuator
board; 2) Bad (leaking internally) valve. See
"Passed": Repeat
see procedure number
PHT- 5.0.0 CHECK VENOUS PRESSURE STABILITY
a) Call debug screen 1.
b) Referring to the Figure (right), attach a piece of tubing,
with a syringe attached, to the P
Detector module.
c) Push on the syringe plunger until VEN is
approximately 300 mmHg then clamp
the syringe.
d) A decrease of greater than 3 mmHg in 30 seconds
may indicate a leak inside the Level Detector
module.
IMPORTANT!
e) Do NOT detach the tubing so that
VEN remains about 300 mmHg for subsequent
procedures.
f) See procedure number
PHT- 5.1.0 CHECK SECONDARY CIRCUIT / CHECK DIALYSATE PRESSURE
a) ASSURE the Bypass LED is off (i.e. flow through the external flow indicator).
IMPORTANT!
b) Turn Dialysate flow OFF (Dialysate Flow on/off LED blinks).
c) Referring to the Figure (right), attach the four way test assembly to the
dialyzer lines. If using a NEO-2 meter attach to the top pressure port.
d) Hang the assembly over the dialyzer holder.
e) Assure all assembly connections are TIGHT!
IMPORTANT!
f) Close the shunt door!
g) Pull on the syringe plunger. Are you able to create
approximately -250 mmHg AND hold it (+/- 20
mmHg per minute) on the external meter?
Yes Clamp the syringe tubing to hold
pressure then see procedure
number PHT- 5.2.0
No Remove the tubing from the P
port and see procedure number
PHT- 5.3.0
Diagnostics Valve Leak Test. Allow the [Test Status] data box = "Ready".
PHT- 4.4.0 parts b and c to test Valve #25. If BOTH valves #24 and #25 pass
PHT- 7.0.0 (page 198).
port, at the Level
ven
PHT- 5.1.0 (page 195).
(page 196).
ven
(page 196).
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
Figure 35 A (page 79) to locate the valve.
Section 10 – Pressure Tests Failing
Page 195