Model 686CS Instruction Manual
D00312132
Revision F, October 2015
21
7
Troubleshooting and Maintenance
The Constant Speed Mixer, Model 686CS is a heavy-duty machine that requires
minimal daily maintenance.
Before using the mixing blades, weigh them and record the weight.
Replace blades when the weight changes by 10%. See API
Specification 10A, Specification for Cements and Materials for
Well Cementing, section 7 on mixing devices.
Always install the mixing blades so that the blade tips curve
upward and the beveled edges are visible. See Figure 5-1.
Here are a few tips for caring for the Model 686CS:
•
The mixing container should be washed thoroughly after each batch to remove
deposits that can cause wear.
•
Check the blades in the mixing container daily for wear.
•
Replace blades when they have lost 10% mass.
•
Ensure that the blades turn freely in the container. If the blades drag, inspect
the area around them for deposits or other material. If this problem cannot be
readily fixed, replace the container.
•
If the controller does not respond to changes from the control pad, unplug the
mixer from the power source to reset it.
•
The motor and controller do not have any user-repairable items. If the motor
fails to start or does not maintain speed properly, return the blender to Fann for
repair.
•
If the display or programming buttons stop working properly, return the unit to
Fann for repair.
