Fresenius Medical Care 4008 E Technical Manual page 47

Error description:
Error message
F01 UF-Function
F02 UF-Function
F03 UF-Function
F04 UF-Function
F05 UF-Function
F06 UF-Function
F07 UF-Function
F09 UF-Function
F11 UF-Function
F12 UF-Function
1-40
Fresenius Medical Care 4008 4/08.03 (TM)
Description
The pause between the strokes of the UF pump 1 was shorter than
220 ms. Correct volume delivery is not ensured due to too short a
return.
– CPU1 issued too high a pump rate.
The pulse time for the UF pump 1 is shorter than 180 ms. Correct
volume delivery is not ensured due to too short an emission time.
– The monoflop on P.C.B. LP 634 is defective (IC42/R82/C47).
The pulse time for the UF pump 1 is longer than 500 ms. A maximum
rate of 5000 ml/h is not possible.
– The monoflop on P.C.B. LP 634 is defective (IC42/R82/C47).
No activity of the UF pump 1 during the test (5 sec).
– Acknowledgement (UF_P1, X637/B23) → X632/A7, no LOW puls-
es.
– Control line (UF_P1, X634L/ABC23) → X637/B23, no LOW pulses.
The UF pump 1 cannot be stopped by CPU2.
– Control line (UF_P_EN, X632/C28) → X634R/A22, 5 V are missing.
– The reset input at IC42/pin 3 on P.C.B. LP 634 is defective.
The UF pump acknowledgement of CPU1 is defective.
– Acknowledgement (UF_P1, X637/B23) → X622L/C14, no LOW
pulses.
The change in pressure after a stroke is less than 20 mmHg.
– The UF pump 1 is mechanically defective.
– Control line (UF_P1_CTL, X632/C27) → X634R/A24, no LOW
pulse.
Dialysate pressure is outside the measuring range (15s).
– UF pressure transducer defective
– D/A converter (IC11) on P.C.B. LP 632 defective
– Operational amplifier (IC1/IC3) on P.C.B. LP 632 defective
The pause between the strokes of the UF pump 2 was shorter than 220
ms. Correct volume delivery is not ensured due to too short a return.
– CPU1 issued too high a pump rate.
The pulse time for the UF pump 2 is shorter than 180 ms. Correct
volume delivery is not ensured due to too short an emission time.
– The monoflop on P.C.B. LP 634 is defective (IC42/R65/C45).