Fresenius Medical Care 2008K Troubleshooting Manual page 247

OVER- 4.0.2 CHECK THE FLOAT SWITCH #5 (Slow Overflow)
a) Referring to the Figure (right), unplug the float from distribution
board position labeled "FLOAT-SW" (3
left).
b) Using a flashlight, check inside the vacant x5 and position for
'white' corrosion or damaged male pins that may cause false
signals.
c) If the distribution board is okay, watch for one minute. Does
the dripping continue?
Yes Replace the actuator board (see
No Replace float switch #5 (see
OVER- 5.0.0 CHECK VALVE #39 (Slow Overflow)
Valve #39 opens in the Cleaning Programs to relieve deaeration pressure. This is especially important in
Heat Disinfect to prevent boiling which may cause vent tubing overflow!.
a) Re-attach the 'air gap chamber' tubing.
b) Referring to Figure 102
deaeration pumps input nozzle. Assure the gauge reads 0 inHg before attaching it.
c) Place the machine into Rinse program. Gauge pressure between 0 and -15 inHg?
Yes Valve #39 is okay! See procedure number
No See procedure number
OVER- 5.0.1 ISOLATE VALVE #39 / ACTUATOR BOARD
a) IMPORTANT! Allow Rinse program to continue for seven minutes.
b) Referring to Figure 102
chamber. Touch valve #39's (black) solenoid. Is it warm (i.e. energized)?
Yes The actuator board is okay. Valve #39 is bad.
No NOTE that VALVE #39 (ONLY) will be checked and proceed to page 78,
TROUBLESHOOTING
OVER- 5.0.2 FINAL CHECKS
a) Turn the machine off.
b) Referring to the Figure (right), remove the heater and check its
port into the top of the hydro block/hydro chamber for heat
related damage (i.e. melting). If (and ONLY if) damage is
located it will be necessary to replace the hydro block/hydro
chamber.
c) Reinstall the heater.
d) All systems that cause vent tubing overflow are initially
checking okay. If overflow continues, float switch #5 may be
bad (see Figure 28, page 59).
rd
connector from the
Figure
Figure 28, page 59).
(page 246), attach the deaeration gauge between the inlet (clear tubing) and the
OVER- 5.0.1
(page 246), valve #39 is mounted to the bottom of the hydro block or hydro
VALVES.
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
Section 20 - Troubleshooting Overflow From The Vent Tube
4A, page 8).
OVER- 5.0.2 (page 245).
(page 245).
Page 245