Fresenius Medical Care 4008 E Technical Manual page 97

If not enough air was separated and the fluid level is still below the level sensor (6), the
FILL PROGRAM is activated.
The pump (21) fills either chamber A1 or chamber A2. Valves (36), (38), and (30) are closed. The
valve (43) opens. The air can escape into the drain.
1st cycle:
2nd cycle:
Filling is performed in this way to prevent a change in conductivity. As is the case in the standard
program, here as well one stroke of the concentrate pump is still accomplished per balancing
chamber cycle (30 ml).
A fill program is always activated at the beginning of hemodialysis (to fill the dialyzer). Should it be
activated during the hemodialysis procedure (OD dark), this is shown on the display.
1-90
Fresenius Medical Care 4008 4/08.03 (TM)
Chamber F1 is filled. This forces the fluid from chamber A1 into chamber A2. The
fluid is then forced into the seconary air separator (88b) by chamber A2 via the
dialyzer.
Chamber F2 is filled. This forces the fluid from chamber A2 into chamber A1. The
fluid is then forced into the secondary air separator (88b) by chamber A1 via the
dialyzer.
Note
Repeated activation of the fill program during treatment indicates a defect
(leakages).