Fresenius Medical Care 2008K Troubleshooting Manual page 46

F- 9.0.2 CHECK FLOW RELIEF VALVE #78
Referring to Figure 21 (page 43) and using pliers (i.e. do NOT use a plastic clamp) quickly clamp and
unclamp the white tubing at the top of Flow Relief Valve #78 several times. Does pressure reach or exceed
Table L's (page 43) maximum pressure?
Yes Replace Flow Relief Valve #78 with a known good then see
No. Two possibilities: 1) Bad flow pump #21; 2) Bad flow pump motor (possibly bad brushes);
F- 9.0.3 CHECK FLOW MOTOR
a) Enter Service Mode
b) Press the 'CONFIRM' key to start the flow pump. Assure its running counterclockwise!
c) Referring to Figure 21
able to reach the maximum pressure indicated in
Yes a) NOTE: If the adjustment screw had to be turned fully clockwise (i.e. threads not
visible) two possibilities: 1) Bad flow pump head (#21); 2) Bad flow pump motor
(possibly bad brushes). After repair calibrate Flow Pressure!
b) Return to Dialysis program (remember to press the "CONFIRM' key). If a Flow Error
reoccurs see part c.
c) Read this step completely! Return to procedure number
you return here, two possibilities: 1) Bad flow pump head (#21); 2) Bad flow pump motor
(possibly bad brushes).
No Two possibilities: 1) Bad flow pump head (#21); 2) Bad flow pump motor (possibly bad brushes).
F- 9.0.4 CHECK CFS CIRCUIT
a) Attach to concentrate and return to Dialysis program
(remember to press the 'CONFIRM' key).
b) Referring to the Figure (right), insert one of the resistor
plugs, from the four-resistor Temperature set, into CFS
#10's distribution board position x10, "CFS". This
simulates a good CFS (#10) transducer.
c) From debug screen 10, does ACFS go to 0?
Yes See procedure number
No a) ASSURE the resistor plug was placed correctly before continuing! If not, repeat
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. NOTE that three (3) CFS TRANSDUCER connections will
be checked and proceed to page 228,
BOARD
Calibrate Hydraulics
(page 43), adjust Flow Relief Valve #78 (clockwise increases pressure). Are you
F- 9.0.5 (page 45).
F- 9.0.4 (page 44) from part b.
b
; 3) Bad sensor cable
Hardware Options. Set T and C (Test and Calibration) to "Yes". Press the
CABLE.
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
Section 1 – Flow Errors In Dialysis Program
Flow Pressure.
Table L (page 43)?
c
; 4) Bad distribution board.
Figure 4A, page 8). Enter Service Mode
SECTION 17 - CHECKING THE SENSOR
F- 9.0.3 (page 44).
F- 1.0.3 (page 15) however if
a
:
Page 44