Fresenius Medical Care 2008K2 Troubleshooting Manual page 594

a) Trace Valve #28's wires from the
distribution board to the valve's
(black) solenoid. THREE (3)
checks:
Check #1: If a wire is pinched or
insulation is damaged this
may be the problem!
Check #2: If the wires DO NOT terminate properly at the solenoid terminals this may be the
problem!
Check #3: If the solenoid terminals are corroded this may be the problem!
b) Figure right, open Valve #28's female
distribution board connector cap.
c) If the wires ARE NOT connected between the
TOP and BOTTOM terminals this is the
problem!
d) Measure resistance (Ω), between the TOP and
BOTTOM terminals. Between 40 and 100 Ω?
Between 40 and 100 Ω! THREE (3) possible bad components (see COMPONENT
Yes
LIST below). One at a time, swap in each component and in between perform the
®
DiaSafe
swapped in was the problem.
COMPONENT LIST: 1) Actuator-Test Board; 2) Actuator cable; 3) Distribution
board.
Less than 40 Ω OR more than 100 Ω. TWO (2) possible bad components: 1) Bad
No
valve #28 blue wire harness OR; 2) Bad valve #28.
test until the syringe plunger is drawn indicating the last component
LEFT BLANK INTENTIONALLY
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
Page 590