P- H.4.1 Isolate "5V High" Or "5V Low" Or "12V Power Fail"; P- H.4.2 Heat-Related Failure? - Fresenius Medical Care 2008K2 Troubleshooting Manual

2) IF any "24V" alarm OR "Loading Software....Please Wait" lasts longer than one (1) minute:
page 625
Proceed to
3) IF a "24V" alarm has never occurred but "Failed Sending Data To Actuator Board" has: If the
"Actuator Board" alarm reoccurs one of the card cage boards may be interfering with communication
between the Actuator-Test Board and the Functional Board. The most likely culprit is the Actuator-
Test Board itself.
4) ALL other scenarios: See procedure number
P- H.4.1 ISOLATE "5V High" OR "5V Low OR "12V Power Fail"
The following procedure describes how to use the debug screens to monitor +5 and +12 volts:
a) Select the screen's 'Dialysis' button but
b) Call debug screen 1 and locate 5V Est AND 12V Est (Figure right):
•
5V Est: If EVER less than 4.8 ("5V Low") OR more than 5.3 ("5V High") OR
unstable (changes more than +/- 0.1) see procedure number
•
12V Est: If EVER less than 11.7 OR more than 12.3 ("12V Power Fail") OR unstable (changes
more than +/- 0.1) see procedure number
c) At the bottom of the screen, select the 'Dialysate' tab, THEN press 'CONFIRM' to return to Dialysis
Program!
d) Call debug screen 1.
e) WITHOUT LOOKING AWAY, watch 5V Est AND/OR 12V Est for ten (10) minutes or longer. Does 5V
Est OR 12V Est become UNSTABLE (changes more than +/- 0.1)?
Yes Unstable! See procedure number
No a) To generate cabinet temperature place the machine into Heat Disinfect then call debug
screen 1. If debug does not appear press 'Escape' then call screen 1.
b) If 5V Est OR 12V Est BECOME unstable see procedure number
If Heat Disinfect completes without a voltage-related alarm occurring the
Troubleshooting Guide cannot locate an immediate problem!

P- H.4.2 HEAT-RELATED FAILURE?

a) The most likely cause of this failure is the Power Logic Board (see Figure 4A and NOTE A (page 9)).
Replace it with a known good then see part b
b) Repeat procedure number
SUFFICIENT TIME! If the problem reoccurs next try a known good Sensor Board then see part c.
c) Repeat procedure number
SUFFICIENT TIME. If the problem reoccurs see procedure number
, procedure number P- H.4.5.
P- H.4.1
DO NOT
P- H.4.2
P- H.4.2
P- H.4.1 (page 624) to watch 5V Est AND/OR 12V Est.. ALLOW
P- H.4.1 (page 624) to watch 5V Est AND/OR 12V Est.. ALLOW
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
(page 624).
press CONFIRM yet!
P- H.4.2 (page 624).
(page 624).
(page 624).
P- G.5.0
P- H.4.2 (page 624).
page 610
( ).
Page 624