Fresenius Medical Care 4008 E Technical Manual page 111

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Fresenius Medical Care 4008 4/09.03 (TM)
Description
General checks
Power failure alarm
Check level sensor
Check valves 91; 99 and 100
This check will not be applicable if:
– CDS is activated – P.C.B. LP 631 SH2 SW8 set to ON
– the hydraulics test is activated – P.C.B. LP 631 SH2 SW7 set to ON
Check of the hydraulics
Check all pressures with undamped pressure gauges!
Check the water inlet pres-
sure (reduced) and correct, if
necessary.
Check the balancing cham-
ber loading pressure and
correct, if necessary.
Check the negative degas-
sing pump pressure
Check the balancing cham-
ber relief pressure at a flow
of 800 ml/min (relief valve
78).
Expected value / function
Dialysis mode;
Continuous sound after removing the power plug.
Text displayed: Emergency operation
The extracorporeal blood circuit incl. all monito-
ring functions is maintained.
Draw in air via the dialysate couplings.
The air separation pump is activated.
If more air is detected, the machine will switch to
the fill program, depending on the dialysate flow.
Text displayed when the OD senses opaque fluid:
Fillprogram
Check externally for tightness and proper function.
Controlled via the diagnostics program.
Connect a pressure gauge before MV41 to
measuring point A in the hydraulic unit.
With the valve MV41 closed the pressure should
range between 0.9 and 1.4 bar.
Connect a pressure gauge to the pressure side of
the degassing pump (measuring point B in the hy-
draulic unit).
The pressure should be between 1.2 and 1.3 bar.
Connect a pressure gauge to the suction side of
the degassing pump (measuring point D in the hy-
draulic unit).
The negative pressure should be between 0.81
and 0.85 bar.
Connect a pressure gauge to the pressure side of
the flow pump (measuring point C in the hydraulic
unit).
The maximum pressure should be between 2.0
and 2.1 bar.