T- 1.3.90 Isolate Ntc #2/Temp Control - Fresenius Medical Care 2008K2 Troubleshooting Manual

T- 1.3.90 ISOLATE NTC #2 / TEMP CONTROL
a) Return to Calibrate Sensors → Temp Control
b) Press 'CONFIRM' to turn the [TEMP DAC] data box pale yellow / white.
c) ENSURING the shunt door is CLOSED the external flow indicator's 'bob' MUST be moving up and down!
d) WITHOUT LOOKING AWAY, watch the external meter for seven (7) minutes OR until if it EVER
exceeds 39°.0 C even if only once. TWO (2) possible scenarios:
1) IF (and ONLY if) the meter NEVER exceeds 39.0° C! Press 'CONFIRM' twice to save the
calibration THEN proceed to
2) IF the meter exceeds 39.0° C! TWO (2) possible scenarios i or ii below:
i.
IF NTC #2 was NOT replaced in THIS troubleshooting session: See parts a and b below:
a) Replace
218).
b) Repeat procedure number
ii.
IF NTC #2 WAS replaced in THIS session: TWO (2) possible bad components (see
COMPONENT LIST below). Replace each, with known good, one at a time and in between
repeat procedure number
COMPONENT LIST: 1) Sensor Board
1
To LOCATE these boards refer to
2
To prevent "Cond Offset Failure" place the machine into T and C Mode (refer to
OPERATING MODES
page 302
NTC #2
* with a known good. *To LOCATE NTC #2 refer to
T- 1.3.90
T- 1.3.90 (page 243) to test the new component.
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LEFT BLANK INTENTIONALLY
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
, procedure number T- 7.0.0.
(page 243)
1,2
; 2) Functional Board
Figure 4A (page 9)
Figure 42 (page
1,2
Page 243