Fresenius Medical Care 2008K Troubleshooting Manual page 154

CO- 9.0.0 CHECK BICARB DEBUG SIGNAL
a) Referring to the Figure (right), unplug the BIC Reed Switch
from distribution board position labeled x12, "BIC-SW" (9
connector cap from the left).
b) From debug screen 2, watch BICOUT for several minutes
in the event of an intermittent failure. Does BICOUT
REMAIN = 1?
Yes Referring to the Figure (right), replace Bicarbonate
reed switch #12.
No a) Using a flashlight, check inside the vacant
x12 position for 'white' corrosion or
damaged male pins that may cause false
signals.
b) Leaving the BIC Reed Switch unplugged, three
possibilities: 1) Bad actuator board; 2) Bad
Function board*; 3) Bad distribution board.
* Swap in a known good function board. Enter Service
Mode Options
(Test and Calibration) to "Yes". Press the 'CONFIRM'
key (the "x" turns blue). From debug screen 2, if
BICOUT = 1 the previous function board is bad.
CO- 10.0.0 TROUBLESHOOTING OLC
Call debug screen 0. Referring to the Figure (right), two checks:
1. Is the Post Dialyzer TEMP data box greater than 34°C?
2. Is the Post Dialyzer COND data box greater than 0 mS?
Yes (to both): See procedure number
No (to one OR both): NOTE a problem with either or both the
Figure 62 – Heat Exchanger Check
Hardware Options. Set T and C
CO- 10.1.0
Post Dialyzer TEMP or COND sensor
then see procedure number
10.2.0 (page 154).
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
Section 5 – Conductivity/ On Line Clearance Problems
th
(page 153).
CO-
Page 152