Fresenius Medical Care 2008K Troubleshooting Manual page 121

T- 5.0.2 CHECK DEBUG VALUES
From debug screen 4, note TEMP and ATEM (respectively NTC #3 voltages from the sensor and actuator
boards). Referring to Table 17
Table 17 – Debug Screen 4 TEMP Values
TEMP (Volts DC)
Greater than 5.5
Greater than 5.5
Greater than 5.5
Between 4.5 and 5.5
Between 4.5 and 5.5
Between 4.5 and 5.5
Less than 4.5
Less than 4.5
Less than 4.5
T- 5.0.3 TROUBLESHOOT TEMPERATURE DISPLAY
Six possibilities (see Figure
board; 4) Bad sensor board; 5) Bad distribution board; 6) Bad motherboard.
T- 6.0.0 VERIFY HEATER / INCOMING WATER TEMPERATURE
a) ASSURE incoming water temperature is remaining between 10° and 25° C (50° and 77° F)
b) IMPORTANT! Turn the machine off.
c) Referring to the Figure (right) rotate the
heater 180°. Tighten the bracket screws
evenly! The heater MUST be perfectly
vertical to maintain proper flow geometry.
d) Connect to concentrate and place the
machine into Dialysis program (remember
to press the 'CONFIRM' key).
e) From the Home screen allow ten minutes
then watch Temperature. If still unstable
see procedure number
T- 6.1.0 CHECK AIR REMOVAL SYSTEM
a) Turn Dialysate flow OFF (Dialysate Flow on/off LED blinks) and allow one minute for the deaeration
pump to stop.
b) Referring to the Figure (above, right), tee a gauge to the input of the deaeration pump.
IMPORTANT!
c) Turn Dialysate flow ON (Dialysate Flow on/off LED off). Referring to
(page 260), is Deaeration pressure okay?
Yes See procedure number
No See procedure number
(page 119), proceed accordingly:
ATEM (Volts DC)
Greater than 5.0
Between 3.5 and 5.0
Less than 3.5
Greater than 5.0
Between 3.5 and 5.0
Less than 3.5
Greater than 5.0
Between 3.5 and 5.0
Less than 3.5
4A, page 8); 1) Bad test board; 2) Bad actuator board; 3) Bad power logic
T- 6.1.0 (page 119).
T- 6.2.0 (page 120).
T- 6.1.1 (page 120).
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
YOUR RESPONSE:
See procedure number
Bad sensor board (see Figure
See procedure number
Bad actuator board (see
See procedure number
Bad actuator board (see
See procedure number
Bad sensor board (see Figure
See procedure number
Section 4 – Temperature Problems
T- 5.0.3 (page 119).
4A, page 8).
T- 5.0.3 (page 119).
Figure 4A, page 8).
T- 7.0.0 (page 121).
Figure 4A, page 8).
T- 5.0.3 (page 119).
4A, page 8).
T- 5.0.3 (page 119).
Appendix A
Page 119