Error Messages - Fresenius Medical Care 4008 HDF Technical Manual

Error description:
Error message
F11 UF-Function
F12 UF-Function
F 13 UF-Function
F14 UF-Function
F15 UF-Function
F16 UF-Function
F17 UF-Function
F20 UF-Function
Description
The interval between the strokes of the UF2 pump was less than
220 ms. Correct delivery of the required volume is not safeguard-
ed because the stroke return travel is too short.
– A pump rate which was too high was signalled by the CPU 1.
The pulse time for the UF2 pump is less than 180 ms. Correct
delivery of the required volume is not safeguarded because the
discharge time is too short.
– Monoflop on LP 634 defect (IC 42/R65/C45).
The pulse for the UF2 pump is longer than 500 ms. A maximum
rate of 5000 ml/h is not possible.
– Monoflop on LP 634 defect (IC 42/R65/C45).
UF2 pump not active during the test (4 s).
– Acknowledgement (UF_P2, X637/B26) → X632/C7 no LOW
pulse
– Control line (UF_P2, X634L/A–C24) → X637/B26 no LOW
pulse
The UF2 pump cannot be stopped by the CPU2.
– Control line (UF_P_EN, X632/C28) → X634R/A22 no 5 V.
– Reset input to IC 42/pin 13 on LP 634 defect.
The UF pump acknowledgement from CPU1 is faulty.
– Acknowledgement (UF_P2, X637/B26) → X633/C23 no LOW
pulse
The change in pressure after a UF2 pump stroke less than
20 mmHg.
– UF2 pump mechanically defect.
– Control line (UF_P2_CRTL, X632/B24) → X634R/C11 no
HIGH pulse.
Difference in pressure between UF pump stroke and UF2 pump
stroke more than 20 %.
– Stroke rate for UF pump or UF2 pump not set correctly.
Fresenius Medical Care 4008 HDF 3/11.97 (TM)
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