Fresenius Medical Care 4008 E Technical Manual page 64

Rinse Failure F13
In case of F07, F08 and F13, the "DO NOT SWITCH OFF !!" message can, in addition, be
alternately displayed.
However, this message is displayed only if a mandatory rinse program is requested, since the
concentrate and bicarbonate lines still have to be emptied before the machine is switched off.
Rinse-free program with following Dis or HDIS or mandatory rinse as
individual program in Dis I to V.
Pressure drop during the monitoring phase on PSW_104 (S124) (bicar-
bonate) or PSW_102 (S123) (concentrate) or pressure build-up impos-
sible.
– Check switching point of pressure switch.
– Check loading pressure.
(Possibly splinter or contamination in orifice 151; remove tube and
blow through tube from both ends)
– Check negative pressure and orifice (89).
(For this purpose, remove and purge the tubing from both
ends)
– Check check valve (117/118) and filter (119/120).
– Check CDS valve (102/104).
– Verify tightness of CDS path.
– Check acknowledgement of pressure switch on P.C.B. LP 633:
Bicarbonate: X633L/ A19
Concentrate: X633L/ A20
– Cartridge filter upstream of degassing pump clogged or wrong filter
(filter for disinfectant container) installed. Filters can be distin-
guished by different adapters.
Fresenius Medical Care 4008 4/08.03 (TM)
1-57