Wd- 1.0.0 Isolate 24V- B Power Supply - Fresenius Medical Care 2008K2 Troubleshooting Manual

WD- 1.0.0 ISOLATE 24V- B POWER SUPPLY

a) Per the Figure below, locate the motherboard's nine (9) pin TEST Connector.
b) Spread the card cage side panels open then gently drop the front panel down to access the
motherboard's nine (9) pin TEST Connector.
pin 8
c) Measure at (second pin from right) as seen in the Figure above. TWO (2) possible scenarios:
1) IF (and ONLY if) more than 3.0 volts DC: Leaving the "WD: Fail Long Pulse" OR "WD: Fail Short
Pulse" banner up see procedure number
2) IF less than 3.0 volts DC: Read before performing! Turning the machine off in between, one at a
time, swap in the listed components (see Component List (below)) with known good, then test the
machine in between each. Turn the machine off and on several times, allowing twenty (20)
seconds in between, to test each component!
Component List: 1) Sensor Board
1, 2
To prevent "Cond Offset Failure", place the machine into T and C Mode (refer to
MODES, page Error! Bookmark not defined.)) for each board.
WD- 1.0.1
1;
2) Actuator-Test Board; 3) Functional Board
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
(page 572).
2
OPERATING
Page 571