Fresenius Medical Care 2008K Troubleshooting Manual page 201

PHT- 8.0.0 PERFORM ON-LINE PHT (IF ACTIVE)
This procedure checks the balancing chamber valves for internal leaks using the
machine's On Line PHT (Pressure Holding Test) function (if active). Call debug screen 1.
Is NPHT (upper right) remaining = 720?
Yes On Line PHT is not activated. See procedure number
recommends that ONLINE PHT is activated!
No a) Initiate the test by pressing and holding numeric key pad #1 key for 5 seconds or until
PHTACT = 1. When PHTACT = 0 (test complete) repeat the test by pressing and holding
numeric keypad #1 until PHTACT = 1.
b) When PHTACT = 0 again, from screen 1, check PHT0 and PHT1 then refer to
(page 199).
Table 22 – On Line PHT Results
PHT0
Less than 25
Greater than 25
Less than 25 Greater than 25
Greater than 25 Greater than 25
PHT- 8.1.0 TROUBLESHOOT THE SECONDARY SIDE
A. Assure the dialyzer lines are in the shunt and the door is closed.
B. Remove the tubing with syringe (if still attached) from the P
C. NOTE this procedure and page number in case you need to return here. Proceed until a problem is
located:
a) Perform SECTION 12- INDUCED POSITIVE PRESSURE TESTS
external water leak. If a leak is not located continue with PHT- 8.1.0 part b.
this may be the problem!
b) Perform SECTION 11- INDUCED AIR LEAK TESTS
leak. If an air leak is not located continue with PHT- 8.1.0, part c.
may be the problem!
c) Replace the DiaSafe
. If they do NOT pass continue with PHT- 8.1.0, part d.
Tests
NOTE
d) nine leak tests will be performed: 1) IOS; 2) Balancing Chamber Valves #31 through #38.
See SECTION 18A – AUTOMATED VALVE LEAK TESTS
e) After repairs and the Pressure Tests pass perform also procedure number
INTEGRITY CHECK
PHT1
From the 'Test & Options' screen, perform automated Pressure
Tests (Negative and Positive) twice. Do they pass?
Less than 25
Yes See procedure number
No
Note this page and procedure number then proceed to page 230,
SECTION 18A – AUTOMATED VALVE LEAK TESTS
Less than 25
balancing chamber valves #31 through #38. If a leak is not located
return to
Note this page and procedure number then proceed to page 230,
SECTION 18A – AUTOMATED VALVE LEAK TESTS
balancing chamber valves #31 through #38. If a leak is not located
return to
Secondary Volumetric Leak: See procedure number
(page 199).
®
filter per procedure then repeat the
(page 200).
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
PHT- 8.1.0
Response:
PHT- 9.0.0
See procedure number PHT- 8.1.0
PHT- 1.0.0 (page 190).
PHT- 1.0.0 (page 190).
port.
ven
(page 202) to locate a possible hydraulic air
automated Pressure (Negative and Positive)
(page 230).
Section 10 – Pressure Tests Failing
(page 199). NOTE! Fresenius
Table 22
(page 200).
(page 199)
to check
to check
PHT- 8.1.0
(page 208) to locate a possible
If a leak is located
If a leak is located this
PHT- 9.0.0, UF
Page 199