P- G.5.5 Symptom Not Present/Isolate Sensors And Pumps - Fresenius Medical Care 2008K2 Troubleshooting Manual

P- G.5.5 SYMPTOM NOT PRESENT / ISOLATE SENSORS AND PUMPS
IMPORTANT! To prevent damage turn the machine OFF!
a)
IMPORTANT!
b) Reconnect the Sensor Board cable!
c) One of 13 Sensors (NTC #2 - NTC #44) or one of five (5) Pumps (#16 - #22) may be causing the
problem. This procedure locates the bad component.
-
d) With the machine off, per the Figure above, your choice, unplug ONE of the Sensors or ONE of the
Pumps from the Distribution board.
ENSURE the meter's black lead remains connected to chassis ground!
e)
IMPORTANT! Turn the machine ON (fan running)!
f)
g) IGNORE grinding and / or UF and / or acid and / or bicarb pump alarms and / or Flow Errors.
h) Re-measure +12 and / or +5 volts (within range now?). If the screen is on select the 'Dialysis' button but
DO NOT press 'CONFIRM' THEN call debug screen 1. If the symptom was intermittent allowing
sufficient time, does the symptom you were troubleshooting reoccur?
Yes Symptom reoccurs! Repeat parts d through h until ALL 13 Sensors (including Blood Leak) AND
ALL 5 pumps have been unplugged OR until the symptom does NOT reoccur indicating the last
component plugged in or its cable is the problem.
NOTE: If after ALL components have been unplugged AND the symptom reoccurs, turn the
machine off and replace the Sensor Board cable with a known good then repeat parts e
through h. If the symptom reoccurs see procedure number
No Screen on and / or good voltages! The last component unplugged or its cable may be causing the
problem.
Figure 118 – Distribution Board
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
P- G.5.6 (page 615).
Page 614