Fresenius Medical Care 2008K Troubleshooting Manual page 21

Yes See procedure number
No Allow 45 seconds then call debug screen 0. If (and
ONLY if) Flow Error = 1 (constant or intermittent) see
procedure number
F- 2.0.5 TROUBLESHOOT HIGH LOADING PRESSURE
Referring to Figure 6 (page 13), adjust loading pressure valve #65's screw counterclockwise but no more than
five turns. Does pressure adjust to its specified maximum per
Yes Allow 45 seconds then call debug screen 0. If (and ONLY
if) Flow Error = 1 (constant or intermittent) see procedure
number F- 2.0.6
No Remove valve #65 from the hydro block/ hydro chamber and check for debris* at the valve port.
*
Debris may indicate: A) Old style hydro block ONLY: 1) 'Rod baffle' degradation in chamber
E (see Figure
debris (if the restrictor o-rings are/were broken). B) New Style hydro chamber AND Old Style
hydro block: 1) Inadequate acid clean cycles (causing excessive bicarbonate precipitate); 2)
inadequately filtered incoming water.
NOTE (Loading Pressure): The deaeration pump creates loading pressure and can be easily heard. It
should run at a constant speed (i.e. tone). If it 'stalls' its tone decreases indicating a bad motor or
brushes. In this event, loading pressure falls below minimum resulting in a "Flow Inlet Error" and/or "Low
Flow Error" and/or "High Flow Error" message! A bad float causes similar symptoms!
F- 2.0.6 CHECK FLOW MOTOR ROTATION
Referring to Figure 7 (page 15),
deaeration motor (i.e. counterclockwise)?
Yes See procedure number
No NOTE the FLOW MOTOR ONLY will be checked then proceed to page 60,
TROUBLESHOOTING
F- 2.0.8 ISOLATE THE 'IN BYPASS' CIRCUIT / CHECK FLOW STABILITY
With the shunt door OPEN:
a) Call debug screen 1. If NPHT is less than 600 press and hold the "1" numeric keypad until
NPHT is greater than 600. Ignore an "On Line PHT Failed" message if it occurs.
b) Call the Home screen. NOTE the selected Dialysate Flow rate. ASSURE
it is NOT set to "a300", "a500" or "a800". IMPORTANT! If Dialysate flow
rate is or was changed allow three minutes for stabilization. If flow is
manually changed remember to press the 'CONFIRM' key.
IMPORTANT!
c) Do NOT reset alarms!
d) Call debug screen 6 and CAREFULLY watch BC Switch for one minute. Referring to
is BC Switch remaining between the indicated times for the NOTED selected flow rate?
Yes The 'In Bypass' circuit is okay. See procedure number
No a) Call the Home screen and check the selected flow rate. It may have defaulted to a
different rate other than what was noted above (idle flow option). If (and ONLY if) flow
rate has changed repeat procedure number
b) There is a problem with the 'In Bypass' circuit. See procedure number
F- 15.0.0 (page 53).
F- 2.0.6 (page 19).
(page 19).
28, page 59); 2) Excessive o-ring lubrication at the restrictor o-rings; 3) O-ring
IMPORTANT
, is the Flow motor shaft rotating in the same direction as the
F- 2.0.8 (page 19).
MOTORS.
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
Section 1 – Flow Errors In Dialysis Program
Table 1 (page 18)?
F- 3.0.0 (page 20).
F- 2.0.8 (page 19).
Table P (page 20),
F- 5.0.0 (page 25).
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