Fresenius Medical Care 4008 E Technical Manual page 43

F05 pos. Pressure
F06 pos. Pressure
F07 pos. Pressure
F08 pos. Pressure
F09 pos. Pressure
F10 pos. Pressure
F11 pos. Pressure
1-36
Fresenius Medical Care 4008 4/08.03 (TM)
Test detuning results in a change in the measuring range of more than
95 mmHg (60 sec).
– The operational amplifier (IC2) on P.C.B. LP 632 is defective.
– Acknowledgement (P_DIAL, X633L/B6) → X632/A29, change in
voltage too large.
– Detuning defective (P_DETADJ, X632/C20) → X633R/C22.
– The balancing chamber valve V36 or V38 (old water valve) is
leaking.
Test detuning results in a change in the measuring range of less than
85 mmHg (60 sec).
– The D-A converter (IC11) on P.C.B. LP 632 is defective.
– Acknowledgement (P_DIAL, X633L/B6) → X632/A29, change in
voltage insufficient.
– Detuning defective (P_DETADJ, X632/C20) → X633R/C22.
– V26 is leaking.
After detuning in the test there is a difference (P.diff > ±9 mmHg)
between the display and the differential amplifier.
– The voltage divider R23/R9 or the operational amplifier IC2 is
defective.
– The operational amplifier IC1/IC3 is defective.
– The balancing chamber valve V36 or V38 (old water valve) is
leaking.
Test detuning results in a change in the measuring range of more than
400 mmHg (20 sec).
– The operational amplifier (IC2) on P.C.B. LP 632 is defective.
– Acknowledgement (P_DIAL, X633L/B6) → X632/A29, change in
voltage too large.
– Detuning defective (P_DETADJ, X632/C20) → X633R/C22.
Test detuning results in a change in the measuring range of less than
350 mmHg (20 sec).
– The D-A converter (IC11) on P.C.B. LP 632 is defective.
– Acknowledgement (P_DIAL, X633L/B6) → X632/A29, change in
voltage insufficient.
– Detuning defective (DIAL_DET_ADJ, X632/C20) → X633R/C22.
The second working point (116 digits) of the operational amplifier
cannot be set correctly.
– The D-A converter (IC11) on P.C.B. LP 632 is defective.
– The operational amplifier (IC1/IC3) on P.C.B. LP 632 is defective.
Change in the dialysate pressure after closing of the solenoid valve V43
(zero point change of ±20 mmHg within 15 sec).
– The solenoid valve V24B is not closed.
– The balancing chamber valve V36 or V38 (old water valve) is
leaking.
The balancing chamber is switched to passage during this test sequence. V43, V24B
and V26 are closed; V24 is open.