Error Messages During Dialysis - Fresenius Medical Care 4008 E Technical Manual

1.1.6

Error messages during dialysis

Error message
Voltage Failure
24 V Switched Off
CPU-II failed
Profile time diff.
Cyclical PHT F01
Cyclical PHT F02
Description
The 24-V/12-V supply voltages are drifting.
The machine enters the safe state and must be switched off/on.
– The 12-V or 24-V operating voltage is outside of the permissible
range:
24 V: > 26 V / < 22.5 V
12 V: > 13.5 to 15 V / < 10.5 V
– Check the power supply unit.
– Power supply unit okay: Check the voltages applied to P.C.B.
LP 633:
+12 V: X633R/A, C31
+24 V: 24V_EM: X633L/B20
The 24-V supply voltage has fallen below 5 V.
The machine enters the safe state and must be switched off/on.
– Check the power supply unit.
– Power supply unit okay: Check the voltages at P.C.B. LP 633:
+24V_EM: X633L/B20
– Remove all plug-in modules. As soon as the machine is running:
reconnect each plug-in module individually with the machine
switched off; determine the defective module and repair it.
– Completely loosen the hydraulic compartment connections.
Caution: J1 must now be fitted on P.C.B. LP 630 since, without it,
the machine would not be able to perform the watchdog test. Be
absolutely sure to remove the jumper again for hemodialysis opera-
tion.
With the machine running, check the short circuit in the hydraulic
compartment for 24-V supply and the valves and pumps for short
circuit.
CPU2 fails to communicate via the serial interface.
The machine enters the safe state and must be switched off/on.
– The software versions of CPU1 and CPU2 are mismatching.
– Hardware defect on CPU2.
Deviation in time between CPU1 and CPU2.
The error message is emitted 60 seconds after the start of the profile.
– The clock module on CPU1 (IC14) is defective; or calibrate the time
in case of layout < D.
Balancing error.
– System leakage.
– Applicable to Diasafe machines: On CPU II, the DIP switch array 2,
switch 1, is not set to "ON".
Balancing error.
– System leakage.
– Applicable to Diasafe machines: On CPU II, the DIP switch array 2,
switch 1, is not set to "ON".
Fresenius Medical Care 4008 4/08.03 (TM)
1-71