Specifications
A64192AA2 FINAL
6-17
Connection Unit
Connection Unit Error Recovery
6
2-45 SL45 Sample Tube Unloading 
Arm cylinder SL45 did 
not fully extend / retract 
and was unable to 
activate its limit sensor. 
The limit sensors are 
AS48 (up) and AS47 
(down).
Connection 
Unit Side 
View
C-2 1. Press PAUSE/RUN to clear the error.
2. If the problem persists:
a. Open the right-side tabletop safety cover.
b. Ensure proper cassette alignment or clear 
any obstructions.
c. Replace covers.
d. Press PAUSE/RUN to clear the error.
3. If the problem persists, call your Beckman 
Coulter Representative.
2-47 SL47 Sample tube(s) pusher 
cylinder SL47 did not 
fully extend and misses 
activating its limit 
sensor. It may not be 
able to push tubes up to 
unload them from 
cassette. The limit 
sensors are AS49 (up) 
and AS50 (down).
Connection 
Unit Side 
View
D-2 1. Press PAUSE/RUN to clear the error.
2. If the problem persists:
a. Open the right-side tabletop safety cover.
b. Ensure there are not too many labels on a 
tube not allowing tubes to be pushed up 
to unload.
c. Ensure proper cassette alignment or clear 
any obstruction.
d. Replace covers.
e. Press PAUSE/RUN to clear the error.
3. If the problem persists, call your Beckman 
Coulter Representative.
2-48 SL48 Vertical Load Elevator 
cylinder SL48 did not 
fully extend / retract 
and misses activating 
its limit sensor. The 
error occurs as the 
loading holder moves 
the sample tube carrier 
up or down. The limit 
sensors are AS51 (up) 
and AS52 (down).
Connection 
Unit Side 
View
D-5 1. Press PAUSE/RUN to clear the error.
2. If loading elevator does not move up or down:
a. Look into the Conveyor cover hole for the 
Elevator carrier.
b. Verify there are no obstructions in the 
path of the Elevator carrier.
c. Press PAUSE/RUN to clear the error.
3. If the problem persists, call your Beckman 
Coulter Representative.
2-49 SL49 Loading Elevator 
cylinder SL49 did not 
fully extend / retract as 
the loading holder 
moved the sample up 
or down and misses 
activating its limit 
sensor. The limit 
sensors are SN42 
(down) and SN43 (up).
Connection 
Unit Side 
View
D-5 1. Press PAUSE/RUN to clear the error.
2. If loading elevator does not move up or down:
a. Look into the Conveyor cover hole for the 
Elevator carrier.
b. Verify there are no obstructions in the 
path of the Elevator carrier.
c. Press PAUSE/RUN
 to clear the error.
3. If the problem persists, call your Beckman 
Coulter Representative.
Tab le 6. 1 Connection Unit Error Codes  (Continued)
Keypad 
Display Sensor
a
Problem
Sensor 
Diagram
Grid 
Ref Solution










