Figure 4-1. Removing The Control Head Cover - Beckman Coulter Optima L Series Instruction Manual

Cover Latch
Remove Key

Figure 4-1. Removing the Control Head Cover

!
WARNING
After removing the panel, listen carefully for
any sounds coming from the drive. Then touch
the fan housing (Figure 4-3) to feel if it is
vibrating and listen again. Do not proceed if
any sound or vibration is emitted from the
housing.
4. Vent the vacuum chamber by slowly turning the screw on the
vacuum solenoid valve to the right until you hear the air released
into the chamber. If you hear a whining noise, close the valve and
wait, as the rotor is still spinning.
5. About 10 seconds after the hissing noise stops, turn the screw to
the left until it stops.
Troubleshooting and Maintenance
Access to
Cover Latch
4-3