Fresenius Medical Care 2008K2 Troubleshooting Manual page 280

c) Per the Figure below, measure at the back side of the SENSOR BOARD'S X2
pin 13
connector at
d) Figure right, does the meter's numeric AND units display
read more than 12,000 Ω (12.0
More than 12,000 Ω (12.0
Yes
performed correctly and the "no voltage to the heater" problem
continues, see parts a through c below:
a)
Swap in a known good Power Logic Board!
b)
Place the machine into Dialysis Program or Heat Disinfect!
c)
Measure for DC voltage again at the Sensor Board's motherboard
connector pin C1 (VERY front pin). A good signal is 3.6 volts DC or
less. If a bad signal is measured the motherboard may be bad.
Less than 12,000 Ω! See parts A THROUGH C below:
No
A) ENSURE the machine was OFF prior to the measurement!
B) Referring to the Figure below, unplug the Sensor Cable.
C) Repeat the measurement at the SENSOR BOARD'S X2 connector at
pin 13
Yes
No The Sensor Board is bad
Figure 46 – Sensor Board / NTC #2 Check
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
(bottom row, 7 pins from the rear of machine).
KΩ
)?
KΩ
)! Assuming all procedures were
. More than 12,000 Ω (12 KΩ) now?
More than 12,000 Ω. TWO (2) possible bad components;
1) Bad Sensor Board cable OR; 2) Bad distribution board.
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