www.lk-ind.com & 713-926-2623
Page. 13
Troubleshooting
Common Issues
Issues that may occur during centrifuge operation include excessive vibration, broken tubes, broken
or malfunctioning LCD screens, cushions stuck in shields, etc. For issues that cannot be identified
and resolved by the user, more technical troubleshooting details can be found on the L-K Industries
website. Alternatively, contact the L-K Industries Tech Helpline for assistance.
Motor
If the motor does not run when the “PUSH TO RUN” button is pushed, make sure there is power to
the motor (green indicator light on). If the light is off, press the “MOTOR POWER ON” button. Ensure
that the sliding door is completely closed. The door locking mechanism consists of a proximity switch
that uses a sensor to determine whether the door is closed. When the door is closed, the switch
closes a circuit feeding power to the motor. Also, check to make sure the “EMERGENCY MOTOR OFF
SWITCH” is not pushed in.
If the motor stalls or does not come up to speed properly or the heaters do not turn on, check the
fuses inside the front panel. Contact the L-K Industries Tech Helpline if assistance is needed in
checking or changing fuses.
If using the Countdown Timer during operation, make sure there is time remaining. Once the timer
runs out, the motor will automatically shut down. If the timer is not being used (i.e. for tests longer
than the typical preset time), turn the timer to the “OFF” position.
When the motor controller is functioning properly, the green indicator light will be lit. If the green
light does not turn on when the “MOTOR POWER ON” button is pressed, there are several
possibilities for the error. Use a screwdriver to open the front panel of the unit and view fault codes
on the LCD screen of the motor controller Contact the L-K Industries Tech Helpline for help
troubleshooting fault codes.
Heaters & Temperature Controller
If
the temperature displayed on the temperature controller has dropped significantly, the
temperature inside the bowl may have reached high enough temperature to open the manual
reset mechanical thermal switch on top of the lid. This will disconnect power to the heaters. Check
the switch on top of the lid to see if it has been tripped. Ensure that the button on the switch snaps
back into place.
If the manual thermal switch has not been tripped, contact the L-K Industries Tech Helpline for
assistance.
Lid and Door Assembly
The following are possible sources of failure of the lid and door locking mechanism:
• Sliding Door – Add grease for smoother opening and closing.
• Proximity Switch & Sensor – These work together to detect door position and allow power to the
motor; failure of either prevents the motor from running.
• Magnet – This is mounted inside the sliding door and aligns with the sensor when the door is
closed; can become detached.
• Solenoid & Locking Pin – These work together to lock the door during motor operation; locking pin
may be misaligned with the door.
Contact the L-K Industries Tech Helpline to troubleshoot problems with the lid and door assembly.