P- G.5.6 Symptom Still Present/Isolate The Actuator Cable - Fresenius Medical Care 2008K2 Troubleshooting Manual

P- G.5.6 SYMPTOM STILL PRESENT / ISOLATE THE ACTUATOR CABLE
IMPORTANT! To prevent damage turn the machine OFF!
a)
IMPORTANT!
b) Return the ribbon cable to the Sensor Board.
c) Figure below, unplug the Actuator-Test board's ribbon cable.
IMPORTANT! Turn the machine on (fan running)!
d)
e) If possible, place the machine in Dialysis Program.
Ignore all hydraulic alarms and possible grinding!
f)
ENSURE the black lead remains connected to chassis ground!
g)
h) Re-measure +12 and / or +5 volts (within range now?). If the symptom was intermittent call debug
screen 1 to watch 5V Est and / or 12V Est. Allowing sufficient time, does the symptom you were
troubleshooting reoccur?
Yes Symptom reoccurs! See procedure number
No Screen on and/or good voltages! The actuator cable may be causing the problem.
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
P- G.5.9 (page 616).
Page 615