Fresenius Medical Care 4008 E Technical Manual page 34

Error description:
Error message
F01 Accumulator
F02 Accumulator
F03 Accumulator
F95 Accumulator
Description
CPU1 failed to complete the battery test within 5 sec.
– The "test completed" information transmitted via the serial interface
is missing.
The battery charge is insufficient for 15 min emergency operation
(maybe no battery connected).
– The battery voltage (U_ACCU, ...) → X633L/B21 dropped below
17.6 V.
– Acknowledgement (U_ACCU, ...) → X633L/B21 of the battery volt-
age defective.
The test circuit on P.C.B. LP 639 defective.
– The test level is incorrect (TESTBATT, X634R/C23) → X639/A10,
the 12-V pulse is missing (100 ms).
– Power supply unit LP639 SI5 or in 4008B/S systems fuse in the
base defective.
– R39 on P.C.B. LP639 (4008E/H) or P.C.B. LP647 (4008B/S) defec-
tive, possibly caused by flickering power supply unit.
System error.
Fresenius Medical Care 4008 4/08.03 (TM)
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