T- 1.3.17 Temp 6.0 Or Lower/Isolate Ntc#3 Circuit - Fresenius Medical Care 2008K2 Troubleshooting Manual

T- 1.3.17 TEMP 6.0 OR LOWER / ISOLATE NTC# 3 CIRCUIT
Call debug screen 5. WITHOUT LOOKING AWAY, watch TPRE (top, middle column) for one (1) minute
noting its highest and lowest values. TWO (2) possible scenarios 1) or 2) below:
1) IF (and ONLY if) TPRE changes more than +/- twenty (20)! TPRE is unstable: Leaving the 6.04
KΩ plug installed, swap in the listed components (see COMPONENT LIST below), one at a time, with
known good, then return to Dialysis Program and repeat procedure number
test each new component until TPRE does not change more than +/- 20.
COMPONENT LIST: 1) Power Logic Board
motor.
a
To LOCATE these boards refer to
the machine into T and C Mode (refer to
defined.))
2) IF TPRE does NOT change more than +/- 20 (twenty)! TPRE is stable! Perform parts a THROUGH g
below:
Turn the HEATER Switch ON!
a)
b) To avoid error, read parts c THROUGH h below BEFORE performing them
c) Turn the machine off and replace NTC #3* with a known good . *To LOCATE NTC #3 refer to
42 (page 218).
d) Figure right, ENSURE the new NTC #3 is plugged
nd
2
into the distribution board position from the left,
"MON-NTC"!
e) Turn the machine on and return to Dialysis Program
("Select Program" → 'Dialysis' → 'CONFIRM')!
f) From the Home screen, set [Dialysate Flow] to 500
ml/min and press 'CONFIRM'.
g) WITHOUT LOOKING AWAY, watch the [Temperature] window for up to ten (10) minutes. Does it
EVER exceed 39.0° C even if only once?
Yes Exceeds 39.0° C! See procedure number
probably okay!
No NEVER exceeds 39.0° C! The original problem (High Temperature) is no longer occurring!
See (ABOVE) procedure number
a
; 2) Sensor Board
Figure 4A
OPERATING MODES
T- 1.0.8
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
a,b
; 3) Deaeration motor; 4) Flow
b
(page 9). To prevent "Cond Offset Failure" place
(page Error! Bookmark not
T- 1.3.40 (page 241). The old NTC #3 is
(page 222).
T- 1.3.17 (page 240) to
Figure
Page 240