Fresenius Medical Care 2008K Troubleshooting Manual page 86

VE- 2.0.0 CHECK SOLENOID CIRCUIT(S)
As NOTED previously, in some cases, more than one valve may need to be checked! ONLY the
NOTED valve(s) needs to be checked!
a) Referring to Figure 38
at their correct location AND the connectors are aligned properly. If not, this is the problem!
b) Referring to Figure 39
valve(s) blue two-wire harnesses from the distribution board to the valve's
(black) solenoid. If a harness is not plugged into the solenoid terminals
(see Figure right) this is the problem!
IMPORTANT!
c) Referring to the Figure (below, right), ASSURE the
NOTED valve(s) blue wiring harnesses are not pinched between the
rear panel and the UF pump, bicarbonate (Bic) pump or the blood leak
sensor. If pinched, this may be the problem!
d) CAREFULLY check each NOTED valve(s) blue
harness for damage (exposed wires, pinched, etc).
If damage is located this may be the problem!
e) Check each NOTED valve(s) the solenoid(s) and
terminals for rust or corrosion. If rust is located
this may be the problem!
f) Referring to the Figure (below, right), remove the
cap from each NOTED valve's female distribution
board connector. All valves, with the
EXCEPTION of valve #26, should be soldered
between pins 1 and 5 (top and bottom). Valve
#26 should be soldered between pins 2 and 5
(second from top and bottom)!
g) Measure resistance ( ) between the
terminals, of all NOTED valves, where
the blue wires are soldered. Is the
meter's numeric AND units display
indicating between 40 and 100
Yes See procedure number
No The valve's solenoid or its blue wiring harness is bad.
Replace BOTH!
(page 84), assure the NOTED valve(s) are plugged into the distribution board
Figure 38 – Distribution Board
(page 85) or Figure 40 (page 85) trace the NOTED
?
VE- 2.0.1 (page 85).
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
Troubleshooting Valve Errors
Page 84