Fresenius Medical Care 2008K Troubleshooting Manual page 70

NW- 4.0.1 ISOLATE VALVE #41 / ACTUATOR BOARD
Referring to the Figure (right), touch valve #41's (black)
solenoid. Is it warm (i.e. energized)?
Yes The actuator board is okay. Replace valve #41.
No NOTE that VALVE #41 (ONLY) will be
checked and proceed to page 78,
TROUBLESHOOTING
NW- 5.0.0 CHECK FLOAT AND VALVE #41
A 1000 ml graduated cylinder (or larger) is required for
this procedure:
IMPORTANT!
a) Turn the water off!
b) Referring to Figure 31
block/ hydro chamber (from valve #41). CAUTION! Do NOT remove the vent tubing!
c) Direct the tubing opening into the cylinder.
IMPORTANT!
d) Turn the water on and measure flow for one minute. Greater than 800 ml?
Yes See procedure number
No Low incoming water (RO source) flow or a restriction at, to or from valve #41 is indicated.
NW- 5.1.0 CHECK WATER SYSTEMS
a) Turn the water off and reattach the tubing.
b) CAREFULLY return the float to distribution board position
labeled "FLOAT-SW" (4
CAREFUL to avoid the empty position on the left)
c) Turn the machine off.
d) Referring to the Figure (right), remove the heater and
check its port into the top of the hydroblock/hydrochamber
for heat related damage (i.e. melting). If (and ONLY if)
damage is located it will be necessary to replace the
hydroblock/hydrochamber.
VALVES.
(page 68), remove the clear tubing that vertically enters the top of the hydro
NW- 5.1.0
Figure 31 – Inlet Water Tubing
th
position from the left, BE
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
(page 68).
Section 2 – "No Water" Message
Page 68