6 Osmetech OPTI™ Repair Procedures
Service Manual – Osmetech OPTI™ Analyzer
6-39
Peristaltic Pump Motor
Removal
The peristaltic pump assembly is comprised of the pump motor and the peristaltic
pump cartridge. During operation the peristaltic pump provides the necessary
pump flow to move reagents, calibration gas and samples.
The peristaltic pump uses a stepper motor which is controlled by the main board
and turns the pump roller in the pump cartridge to generate a small vacuum.
To remove the pump motor:
•
Open the lower portion of the analyzer housing for access to the pump
motor assembly and disconnect the pump motor cable
J7
from the main
board.
•
Open the printer cover and remove the pump cartridge.
•
Open the printer cover and remove the four (4) pump motor mounting
screws, accessed from the top (see Figure below).
•
Remove the peristaltic pump motor by sliding the assembly out from the
lower portion of the analyzer housing.
Figure 32: Peristaltic Pump mounting screws (circled)
Installation
For reinstallation, reverse above steps.
Verification
To test the pump motor go to
DIAG3 – Pump
and press
ENTER
. The pump
should turn counterclockwise for a brief moment, and then it should switch
clockwise and rotate smoothly, without excessive noise through all speeds. If any
of these conditions are not met the pump motor must be replaced.
Important Note
In case the pump hesitates on the fast speed, replace the pump cartridge and
repeat the test.
