Fresenius Medical Care 2008K2, Troubleshooting Manual

Page: 299 / 676

2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
Page 295
T- 5.0.0 CHECK TEMP (SCREEN 4)
From debug screen 4, is TEMP LESS THAN 1.0?
Yes TEMP is less than 1.0! See procedure number T- 5.0.1 (page 295).
No TEMP is more than 1.0! Proceed to
page 297
, procedure number T- 5.0.3 .
T- 5.0.1 TEMP LESS THAN 1.0
a)
Turn the machine OFF!
b) Open the card cage.
c) Figure right, now place the
274
Ω
from the TWO-RESISTOR SET in
the
2nd
distribution board position
from the left, “MON-NTC”.
d)
Set your CALIBRATED
volt meter to resistance (Ω)!
e)
Connect the meter’s black lead to chassis ground (see Figure 2 , page 4)).
f) Per Figure 53 below, measure at the solder side of Sensor Board’s ‘X2’ connector at pin 12 (top row, 6
pins from the rear of the machine).
Figure 53 – NTC #3 Checks
g) Figure right, reading the meter’s numeric AND
units display LESS than 300
Ω
(Yes or No)?