Reading The Digital Inputs Of Cpu I - Fresenius Medical Care 4008 E Technical Manual

5.5

Reading the digital inputs of CPU I

Explanation:
All UF displays show 0000; red, yellow, green traffic light off: low level at latch on P.C.B. LP 633
All UF displays show 1111; red, yellow, green traffic light on: high level at latch on P.C.B. LP 633
If high level is applied, an audible alarm is simultaneously sounded. This tone can be suppressed by
pressing the Alarm Tone Mute key. In this case, the Alarm Tone Mute LED is illuminated.
CPU1: RD DIGITAL INP
Confirm
key
I: CPU1_COND_V84
V84 CD recognition
IC 19/2
Check by pulling off/short-circuiting the
sensors
I: CPU1_LDA1
LD alarm, channel 1
IC 19/3
Check whether LD in alarm/alarm-free
state
I: CPU1_OD_IN
LD optical detector
IC 19/4
Check whether OD detects dark/light
I: CPU1_FL_SWITCH1
Float switch
IC 19/5
Generate water deficiency in calibra-
tion mode: 0
Open V 41 until water exits the vent
tubing: 1
I: CPU1_CI
Balancing chamber switching pulse
IC 19/6
5-10
Fresenius Medical Care 4008 4/08.03 (TM)
I: CPU1_ABG_BYP
Not used
IC 19/7
I: CPU1_ABG_ON
Not used
IC 19/8
I: CPU1_ABG_ALARM
Not used
IC 19/9
I: CPU1_V43
Valve 43
IC 13/2
Check by opening/closing the valve
I: CPU1_V26
Valve 26
IC 13/3
Check by opening/closing the valve
I: CPU1_V24b
Valve 24b
IC 13/4
Check by opening/closing the valve