Fresenius Medical Care 4008 E Technical Manual page 62

The pressure switches are designed as make contacts.
Specifications:
Delta pressure switch:
Alcatel-SEL-pressure switch:
Envec pressure switch:
Error message
Rinse Failure F05
Rinse Failure F06
Rinse Failure F07
Switching point 700 mbar ±20 mbar
Switching range 675 – 805 mbar
Switching range 700 mbar ±20 mbar
Description
Rinse-free program with following Dis or HDIS or mandatory rinse as
individual program in Dis I to V.
It was impossible to open the pressure switch for PSW_104 (S124)
(bicarbonate).
– Pressure on distribution piping > 500 mbar (according to specifica-
tion, the permissible pressure is max. 500 mbar) pressure peaks on
distribution piping: Frequently occurs in distribution pipings with
user points if e.g. several patients are disconnected simultaneously
and disinfection is started.
– Switching point of pressure switch too low:
Desired value = 700 mbar ± 20 mbar
– Check acknowledgement of pressure switch on P.C.B. LP 633:
Bicarbonate: X633L/ A19
Rinse-free program with following Dis or HDIS or mandatory rinse as
individual program in Dis I to V.
It was impossible to open the pressure switch for PSW_102 (S123)
(concentrate).
– Pressure on distribution piping > 500 mbar (according to specifica-
tion, the permissible pressure is max. 500 mbar) pressure peaks on
distribution piping: Frequently occurs in distribution pipings with
user points if e.g. several patients are disconnected simultaneously
and disinfection is started.
– Switching point of pressure switch too low:
Desired value = 700 mbar ± 20 mbar
– Check acknowledgement of pressure switch on P.C.B. LP 633:
Concentrate: X633L/ A20
Rinse-free program, Dis, HDIS, or mandatory rinse in Dis I to V.
Pressure drop during the monitoring phase on PSW_104 (S124) (bicar-
bonate) or pressure build-up impossible.
– Check switching point of pressure switch
– Check loading pressure
(possibly splinter or contamination in orifice 151, remove tube and
purge tube from both ends).
– Check negative pressure and test orifice (89).
(For this purpose, remove and purge the tubing from both
ends)
– Check check valve (118) and filter (120).
– Check CDS valve (104).
– Verify tightness of CDS path.
– Check acknowledgement of pressure switch on P.C.B. LP 633:
Bicarbonate: X633L/ A19
– 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)
1-55