Using The Troubleshooting Guide - Fresenius Medical Care 2008K Troubleshooting Manual

A. It is assumed the troubleshooter is certified on 2008 K machines and knows how to use the required test
equipment (see page 11).
B. Wear gloves!
C. Always perform INITIAL CHECKS
when Troubleshooting is complete
D. Procedures are arranged in 'flow chart' style that logically isolates to malfunctioning component(s). Read
each procedure THOROUGHLY then proceed as directed. Pay particular attention to 'Cautions' and
'Notes'.
E. Be CAREFUL to maintain your location as you read. Missing or skipping steps will lead to error!
F. Sometimes alternate procedures are 'called'. When this occurs, NOTE the procedure and page number
before proceeding to the 'called' procedure in case you need to return.
G. Do NOT calibrate or 'swap' parts unless instructed. If possible, return the machine to the state where the
malfunction was first observed. NEVER swap parts between malfunctioning machines!
H. If 'possibilities' are suggested, for example: Two possibilities: 1) Bad actuator board; 2) Bad test board;
swap the listed parts in one at a time, with known good, (i.e. tested) and test the machine in between for
the symptom that you are troubleshooting.
IMPORTANT!
I. ALWAYS turn the machine OFF before replacing a circuit board or unplugging ribbon
cables. Observe Electrostatic Discharge (ESD) Precautions when working inside the electronic card cage!
J. Calibration may be required after replacing a component. See
K. Referring to Figure 1
ground, connect the meter's ground (black) lead to the metal card cage i.e. chassis ground.
L. Some procedures vary depending upon the optional DiaSafe
are two types:
®
1. DiaSafe Filter Plus: Mounted externally on the rear panel of the machine
2. Old Style DiaSafe
Continued on next page

USING THE TROUBLESHOOTING GUIDE

(page 6) before beginning. Always perform
.
(page 3), if (and ONLY if) asked to measure voltages or resistances with respect to
Figure 1 – Ground Lead
®
Filter: Mounted inside, on the floor of the hydraulic compartment
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
FINAL CHECKS
Appendix B (page 261).
®
filter. Referring to Figure 2A
(page 10)
(page 4), there
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