Fresenius Medical Care 4008 E Technical Manual page 42

Error description:
Error message
F01 pos. Pressure
F24 pos. Pressure
F25 pos. Pressure
F26 pos. Pressure
F27 pos. Pressure
F02 pos. Pressure
F03 pos. Pressure
F04 pos. Pressure
Description
The CPU1 mandatory priming program was not completed (10 sec).
– The solenoid valve V43 is not closed.
V24 valve error.
– Acknowledgement (V24, X637/C1) → X632/A4, 24 V are missing.
No pressure increase above 150 mmHg (change in pressure) after
valve switching.
– Control signals of V24 and V24B mistaken for each other.
– Leakage in the external system (shunt interlock, dialysate lines,
etc.).
– If the HDF filter test was skipped: Clamp the HDF filter.
No pressure compensation after opening of V43 (–125 mmHg to
55 mmHg).
– V24 got stuck (mechanically open).
– V43 not open.
– V26 leaking.
No pressure compensation after opening of V43 (–125 mmHg to
55 mmHg).
– V24 got stuck (mechanically open).
– V43 not open.
– V189 (retentate valve) leaking.
The loading pressure cannot be measured via the solenoid valve V26 in
the hydraulic system (P-Dial. < 600 mmHg, 15 sec).
– Solenoid valve V26 mechanically not open.
– Solenoid valve V43 mechanically not closed.
The balancing chamber is switched to passage during this test sequence. V24, V24B
and V43 are closed; V26 is open.
The hydraulic system cannot be deaerated via the solenoid valve V43;
the zero point of –125 to 55 mmHg has not been reached (15 sec).
– Solenoid valve V26 mechanically not closed.
– Solenoid valve V43 mechanically not open.
– Zero point outside the –125 to 55 mmHg range.
The balancing chamber is switched to passage during this test sequence. V24, V24B
and V26 are closed; V43 is open.
The first working point (220 digits) of the differential amplifier cannot be
set.
– Pressure variations are too large.
– 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.
– The acknowledgement (P_DIAL, X633L/B6) → X632/A29 is defec-
tive.
Fresenius Medical Care 4008 4/08.03 (TM)
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