Beckman Coulter Optima XL Series Instruction Manual page 91

Troubleshooting and Maintenance
9-4
!
WARNING
After removing the panel, listen carefully for any
sounds coming from the drive. Then touch the fan
housing (see Figure 9-3) to feel if it is vibrating and
listen again. Do not proceed if any sound or vibration
is emitted from the housing.
5. Vent the vacuum chamber by slowly turning the small setscrew on the
vacuum solenoid valve to the right (clockwise) as shown in Figure 9-3
until you hear the air released into the chamber. If you hear a whining
noise, close the valve and wait, because the rotor is still spinning.
6. About 10 seconds after the hissing noise stops, turn the setscrew to the left
(counterclockwise) until it stops.
7. Push down on the interlock pin with your finger (Figure 9-3) while
opening the chamber door with your free hand. (If the rotor is still
spinning, close the door and wait.) Be very careful not to touch any
wires or circuitry.
!
WARNING
Do not attempt to run the instrument before
returning the front panel to its correct position.
Figure 9-3. Interior View of Instrument (Panel Removed)
Door
Lock
System
Screw
Fan housing
Spring-loaded
Interlock Pin
Vacuum
Solenoid