Fresenius Medical Care 2008K Troubleshooting Manual page 59

F- 16.0.5 CHECK INCOMING WATER CIRCUIT
This procedure simulates a 'down' float and should open valve #41 to flood chamber C and cause overflow
from the vent tubing:
IMPORTANT!
a) Remove the clamp(s) from the vent tubing.
b) Referring to the Figure (right), place the
two-resistor OLC set, into the float's distribution board position labeled
"FLOAT-SW".
c) After no more than 40 seconds is there strong flow from the vent tubing?
Yes See procedure number
No a) ASSURE
"FLOAT-SW". If not, repeat procedure number
b) See procedure number
F- 16.0.6 PREPARE TO CHECK FLOAT
a) CAREFULLY return the float connector to distribution board position labeled "FLOAT-SW".
60 ml syringe
b) Connect an empty
c) Remove the syringe; push the air out, and repeat steps b - c. After no more than ten tries are you able to
establish continuous 60 ml (or greater) in 30 seconds?
Yes See procedure number
No Recheck the restrictor for debris. If no debris and assuming all above procedures have
been performed correctly, the hydro block or hydro chamber may be bad.
F- 16.0.7 CHECK THE FLOAT
a) This procedure requires up to five minutes determining if the float is working. Follow the instructions
exactly to avoid the unnecessary (and difficult) labor of removing the float.
b) Allow flow to continue into a bucket for up to five minutes. Does it stop?
Yes Replace float switch #5 (see
the machine into RINSE program for three minutes to eliminate an air lock.
No a) Reattach the deaeration pump's tubing
b) Turn Dialysate flow ON (Dialysate Flow on off LED off) and allow one minute.
c) Adjust loading pressure valve #65 per
achieve good loading pressure return to procedure number
d) If the problem occurs again in the near future see procedure number
F- 16.0.8 TROUBLESHOOT INCOMING WATER CIRCUIT
Call debug screen 0, is the dot adjacent to valve #41 blue (indicating valve #41 is open)?
Yes Assure the water is on.
No Three possibilities: 1) Bad actuator board; 2) Bad sensor board cable*; 3) Bad distribution
board.
* The sensor cable can be checked for continuity. NOTE that you are checking one (1) FLOAT connection
and see SECTION 17 - CHECKING SENSOR BOARD CABLE
274
resistor plug, from the
F- 16.0.6 (page 57).
274
resistor plug is placed properly at distribution board position labeled
F- 16.0.8 (page 57).
to the deaeration pump's clear INLET tubing and pull on the plunger.
F- 16.0.7 (page 57).
Figure 28, page 59). IMPORTANT! After replacement place
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
Section 1 – Flow Errors In Dialysis Program
F- 16.0.5.
Table 1 (page 18). If (and ONLY if) unable to
F- 15.0.0
(page 228).
(page 53).
F- 19.0.0 (page 58).
Page 57