Fresenius Medical Care 2008K Troubleshooting Manual page 146

Table V- On Line PHT
PHT0
Less than 25
Greater than 25 Less than 25
Less than 25 Greater than 25
Greater than 25 Greater than 25
CO- 5.5.2 TROUBLESHOOTING LEAK FAILURE
NOTE this procedure and page number in case you need to return here:
NOTE
a) nine leak tests will be performed: 1) IOS; 2) Balancing Chamber Valves #31 through #38. See
SECTION 18A – AUTOMATED VALVE LEAK TESTS
b) If a leak is not located see procedure number
CO- 5.6.0 TROUBLESHOOTING UNSTABLE CONDUCTIVITY
NOTE this procedure and page number, in case you need to return here:
1. Re-check loading pressure. Per
NEVER
dropping below the specified minimum. Watch both levels for two minutes. If (and ONLY if) it
is not 'okay' proceed to page 18, procedure number F- 2.0.4.
2. If not already performed in THIS Troubleshooting session, perform
SECTION 19 - TESTING FOR A LEAKING BALANCING CHAMBER
DIAPHRAGM (page 238).
3. If the machine is OLC equipped ASSURE that a 'strong' spring was not
accidentily installed at the output port of the concentrate pumps. Both
springs in each pump should be 'weak'.
4. Perform SECTION 12 - INDUCED POSITIVE PRESSURE TESTS
(page 208) to check for external water leaks.
5.
See procedure number
CO- 5.7.0 CHECK HYDRO BLOCK/ HYDRO CHAMBER
This procedure pressurizes the Hydro Block / Hydro Chamber to
approximately 20 psi to locate a potential external leak. A clamp and the 274
resistor plug, from the two-resistor OLC set, is required.
a) Referring to the Figure (right), at the top of the hydro block, tie wrap
the segment of vent tubing that is attached to the float.
b) Referring to the Figure (below, right), place the 274
two-resistor OLC set, into the float's distribution position labeled
rd
"FLOAT-SW" (3 connector cap from the left). This simulates a
closed float switch and opens incoming water valve #41.
c) If the 274 plug is placed correctly vent tubing overflow occurs
within 30 seconds.
d) Clamp the vent tubing. This pressurizes the Block/Chamber to
approximately 20 psi (per incoming water regulator #61).
PHT1
See procedure number
Less than 25
See CO- 5.5.2
See CO- 5.5.2
Secondary Volumetric Leak: Proceed to page 199, procedure
number
Table 21 (page 129), it MUST be fluctuating to its maximum AND
CO- 5.7.0 (page 144).
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
Section 5 – Conductivity/ On Line Clearance Problems
Response:
CO- 5.6.0
(page 144).
(page 144).
PHT- 8.1.0.
(page 230).
CO- 5.6.0 (page 144).
plug, from the
(page 144).
Page 144