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SECTION 18B - MANUAL BALANCING CHAMBER VALVE LEAK TESTS
A. These tests should be performed if a leaking balancing chamber valve is strongly suspected and
Diagnostic Valve leak test did not identify it or to validate an Diagnostic Valve leak failure.
B. Intensive work is done inside the distribution board, plugging and unplugging valves. Referring to
Figure 95
(page 533), ensure that all balancing chamber valves (#31 through #38) have their distribution
board connectors labeled correctly and are plugged into their correct positions.
C. A leak is verified through the top balancing chamber valve OUTPUT nozzles (after the tubing is
removed). Ignore small water crowns that may appear. If a valve is leaking it will continually drip.
TOP SIDE LEAK PROCEDURE (Valves #31 through #34)
a) Referring to
Figure 96
top-side balancing chamber valves (#31 through #34).
b) Unplug valve #30 from distribution board position labeled V30, "DRAIN-V" and leave it unplugged until
instructed OTHERWISE.
c) Place both dialyzer quick connects into a bucket of water and close the shunt door.
d) Unplug all eight balancing chamber valves from the distribution board positions "V31" through "V38".
e) Turn the machine on and return to Dialysis Program ("Select Program" → 'Dialysis' → 'CONFIRM').
f)
Ignoring Flow Errors, call debug screen 1. ENSURE that DEAP AND FLWP are less than 255.
Theory: All eight balancing chamber valves are closed (unless one is leaking). The following procedures
open the bottom valves, one at a time, using 24 volts from valve 30's distribution board connector. Since
the deaeration pump (P20) and Flow Pump (P21) are running the bottom valves are pressurized. If a top
side valve is not sealing properly, a water leak will be seen through its exposed nozzle.
g) Plug valve #35 into valve #30's distribution board position (V30, DRAIN-V). Watch the top side balancing
chamber valve nozzles. Replace any valve that is seen leaking (either valve #31 or valve #32).
h) Unplug valve #35 leave it unplugged and plug valve #36 into valve #30's position (V30, DRAIN-V). Watch
the top side balancing chamber valve nozzles. Replace any valve that is seen leaking (either valve #31
or valve #32).
i)
Unplug valve #36 leave it unplugged and plug valve #37 into valve #30's position (V30, DRAIN-V). Watch
the top side balancing chamber valve nozzles. Replace any valve that is seen leaking (either valve #33
or valve #34).
j)
Unplug valve #37 leave it unplugged and plug valve #38 into valve #30's position (V30, DRAIN-V). Watch
the top side balancing chamber valve nozzles. Replace any valve that is seen leaking (either valve #33
or valve #34).
k) Unplug valve #38 and leave it unplugged. None of the top side balancing chamber valves are leaking.
Continue with
BOTTOM SIDE LEAK PROCEDURE
Figure 95 – Distribution Board
(page 534), turn the machine off and remove the clear OUTPUT tubing from all four
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
(page 534).
Page 533
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