Fresenius Medical Care 2008K Troubleshooting Manual page 237

1. Valve #30: Repeat the Automated Valve Leak Test on Valve #29. Proceed accordingly:
Passes: The previous actuator board is bad
Fails: Referring to
previous actuator board is probably good!
2. Any other valve besides valve #30: Repeat the Automated Valve Leak Test on the NOTED
leaking valve. Proceed accordingly:
Passes: The previous actuator board is bad
Fails: Referring to
valve. The previous actuator board is probably good!
AUTOTEST- 6.0.0 TROUBLESHOOT DIALYSATE PRESSURE CALIBRATION
An "Operator Error" message occurred during DIALYSATE PRESSURE Calibration. Check the following:
1. ASSURE the four way assembly has been installed properly and its tubing is not pinched
2. ASSURE the shunt door is closed!
3. ASSURE the transducer protector at the external pressure meter is not wet
4. ASSURE that Dialysate flow is turned off when instructed
5. The [Dial Pressure Reference] data box normally stabilizes at approximately 100 at 0 mmHg and
approximately 140 at -250 mmHg if the above 4 steps are performed correctly and the dialysate pressure
transducer (#9) is good.
6. Turn the machine off, back on, and attempt the DIALYSATE PRESSURE calibration again. If the
"Operator Error" message reoccurs, proceed to page 177,
troubleshoot a potential dialysate pressure transducer problem.
Automated Valve Leak Test Theory:
#69 for leaks to atmosphere (Integrity Of System ("IOS")), and for valves that are not closing due to
mechanical failure or a bad actuator board.
Appropriate pressure is achieved during each "Prep" phase. Referring to
require 'negative' pressure (approx. -300 mmHg), achieved with the UF pump #22, others require 'positive'
pressure (approx. +300 mmHg), achieved with loading pressure. During each "Testing" phase (except "IOS"),
the 'valve to be tested' is closed and a leak path to is opened. During "IOS" all valves are closed to isolate
Chamber #69. Pressure transducer #9 is read for 30 seconds. If pressure remains stable (+/- 25 mmHg) a
leak is not indicated. NOTE: Valves #39, #41, and #28, are not tested.
Table 29 - Valve Pressures
Tests Requiring Negative
Pressure (approx. -300 mmHg)
during the "Prep" phase
Figure 39 (page 85) or
Figure 39 (page 85) or
Automated Valve Leak Tests check Air Removal Chamber
Valve #43
Valve #31
Valve #33
Valve #35
Valve #37
Valve #26
Valve #24
Valve #25
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
Section 18A – Automated Valve Leak Tests
Figure 40 (page 85), replace valve #30. The
Figure 40 (page 85), replace the NOTED leaking
SECTION 9- TMP PROBLEMS
Table 29,
Tests Requiring Positive
Pressure (approx. +300 mmHg)
during the "Prep" phase
IOS
Valve #32
Valve #34
Valve #36
Valve #38
Valve #29
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(page 235), some tests
Page 235