Fresenius Medical Care 2008K Troubleshooting Manual page 26

d) Allow 20 seconds then call debug screen 1. ASSURE VERR is remaining less than 5.
e) Call debug screen 2. Watch FLWOUT CAREFULLY for 45 seconds. Is
it cycling between 1 and 0 now?
Yes See procedure number
No See procedure number
F- 4.2.0 CHECK FLOW ERROR
Call debug screen 0 and watch Flow Error for two minutes or until
if Flow Error = 1. Proceed accordingly:
Flow Error = 1 (constant or intermittent): Return to procedure number
Flow Error = 0 (constant): A Flow problem is not present. Do not continue at this time.
F- 4.3.0 CHECK SOLENOID RESISTANCE ( )
a) CAREFULLY trace the blue wire harnesses from valve #24 AND #43 to the valve's (black) solenoid. See
Figure 35 A (page 79) to locate valve #24;
1) ASSURE the harnesses are NOT 'pinched' against the rear hydraulic panel. If the harnesses are
'pinched' and/or damaged this may be the problem!
2) ASSURE both harnesses are plugged into the solenoid terminals. If not plugged in this is the
problem!
IMPORTANT!
b) Turn the machine off!
c) Open the card cage and place an ohm ( ) meter's lead at chassis ground (see
d) Referring to Figure 8
(rear) side pins are arranged in two rows. Odd numbered in the bottom row, even numbered in the top.
e) CAREFULLY measure resistance at the solder (rear) side of the P2 connector (two measurements):
1. Pin #46 (TOP row, third pin from the FRONT of the machine) = valve #43
2. Pin #29 (BOTTOM row, eleventh pin from the FRONT of the machine) = valve #24
f) Is the meter's numeric AND units display for both measurements indicating
between 40 and 100
Yes Two possibilities: 1) Bad actuator board; 2) Bad function board.
No NOTE which valve(s) is exhibiting bad resistance then see procedure number
25).
Figure 8 – Checking Solenoid Resistances (V43, V24)
F- 4.2.0 (page 24).
F- 4.3.0 (page 24).
Figure 35 B
(page 24), at the top of the actuator board is a large connector (P2). The solder
?
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
Section 1 – Flow Errors In Dialysis Program
F- 1.0.3
(page 79) to locate valve #43. Two checks:
(page 15).
Figure 1, page 3).
F- 4.4.0 (page
Page 24