Fresenius Medical Care 2008K Troubleshooting Manual page 24

F- 3.5.0 ISOLATE ACTUATOR BOARD / VALVE #43
This procedure isolates between the actuator board and valve #43. Distribution board position "AIR-SEN"
should remain EMPTY (i.e. FILACT = 1) for now:
a) Referring to Figure 310
restrictions (possibly white or clear 'bio-growth'). If a restriction is located this is the problem!
IMPORTANT!
b) Allow four minutes for valve #43's solenoid to become warm (if the actuator board is
okay). After four minutes CAREFULLY touch valve #43's (black) solenoid. Is it warm (i.e. energized)?
Yes The actuator board is okay. Replace valve #43 (it is not opening).
No NOTE that VALVE #43 (ONLY) will be checked and proceed to page 78,
TROUBLESHOOTING
F- 3.6.0 CHECK DIALYSATE PRESSURE TRANSDUCER
The dialysate pressure transducer (#9) senses flow in Filling Program. This procedure checks its response.
Distribution board position "AIR-SEN" should remain EMPTY (i.e. screen 1, FILACT = 1) for now:
Call debug screen 0. Is the PDial window varying drastically up and down sometimes showing positive (+)
values?
Yes See procedure number
No Dialysate pressure transducer #9 is bad (see
F- 3.7.0 TROUBLESHOOTING INTERMITTENT FLOW ERRORS
a) Referring to the Figure (right), using a flashlight, CAREFULLY
check the (blue) CFS and dialysate pressure transducers for
signs of (rust colored) external leakage. Replace a leaking
transducer as this may be the problem!
b) CAREFULLY return the air sensor connector to distribution
board position "AIR-SEN".
c) Allow 30 seconds. Call debug screen 1 and assure
FILACT = 0 constant indicating the air sensor is
plugged in correctly.
Continued on next page!
(page 22), using a flashlight, check through the output tubing at valve #43 for
VALVES.
Figure 310 – Valve #43
F- 3.7.0 (page 22).
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
Section 1 – Flow Errors In Dialysis Program
Figure 70, page 185).
Page 22