Fresenius Medical Care 2008K Troubleshooting Manual page 48

F- 10.0.0 CFS #10 ACTING 'OPEN'
a) Referring to the Figure (right) assure the CFS #10 pressure
transducer is plugged into position x10, "CFS". If not this is
the problem!
b) Insert one of the resistor plugs, from the four-resistor
Temperature set, into the CFS #10's distribution board
position x10, "CFS". This simulates a good CFS transducer.
c) From debug screen 10, does ACFS go to 0 volts?
Yes The electronics are working properly. See procedure number
No a) ASSURE the resistor plug is placed properly before continuing! If not, return to procedure
number
b) Leaving the resistor plug installed for now, four possibilities: 1) Bad actuator board
2) Bad sensor board
a
Swap in a known good actuator board and place the machine into Dialysis program.
Call debug screen 10. If ACFS = 0 the previous actuator board is bad
b
Swap in a known good sensor board (see
Options
'CONFIRM' key (the "x" turns blue). Place the machine into Dialysis program. Call
debug screen 10. If ACFS = 0 the previous sensor board is bad
c
The cable can be checked for continuity. NOTE three (3) CFS TRANSDUCER
connections will be checked and proceed to page 228,
THE SENSOR BOARD
F- 10.0.1 CHECK CFS TRANSDUCER
a) CAREFULLY return the CFS transducer to distribution board position x10, "CFS".
b) Turn Dialysate flow OFF (Dialysate Flow on/off LED blinks). From debug screen 10, is ACFS between 3.6
and 6.5?
Yes See procedure number
No The CFS transducer #10 is bad (see
F- 10.0.2 VERIFY CFS
a) Turn Dialysate Flow On (Dialysate Flow on/off LED off) and IMPORTANT allow 30 seconds for transitions
to occur before continuing.
b) Call debug screen 0 and CAREFULLY watch Flow Error for two minutes or until if Flow Error = 1.
Proceed accordingly:
Flow Error = 1 (constant or intermittent): CFS transducer #10 is bad (see
Flow Error = 0 (constant): Problem solved! Do NOT continue to troubleshoot Flow Errors!
F- 11.0.0 CFS #10 ACTING 'SHORTED'
IMPORTANT!
a) Turn Dialysate flow OFF (Dialysate Flow on/off LED blinks).
b) Remove the red dialyzer connector and hang it over the dialyzer holder.
IMPORTANT!
c) Close the shunt door. Ignore "Emptying" related messages.
d) Call debug screen 4. Is PDIA (left column) remaining between 4.0 and 6.0?
F- 10.0.0 (page 46).
b
; 3) Bad sensor cable
Hardware Options. Set T and C (Test and Calibration) to "Yes". Press the
CABLE.
F- 10.0.2 (page 46).
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
Section 1 – Flow Errors In Dialysis Program
c
; 4) Bad distribution board.
Figure 4A, page 8). Enter Service Mode
Figure 21, page 43).
F- 10.0.1 (page 46).
SECTION 17 - CHECKING
Figure 21, page 43).
Page 46
a
:
.