CANNON Instrument Company | Troubleshooting
stirring motor on rear panel. Visually check for
working motor by connecting it to an outlet with the
Bath does not heat
• Sensors are not operational. Check sensor
connections on rear panel.
• Temperature is set lower than current bath
temperature. Check temperature setting. It must be
above the existing bath temperature for heat to turn
on.
• Bath fluid level is too low. Add fluid per manual
instructions. Refer to Filling the Bath if needed.
Bath control is outside specific limits
Bath fluid viscosity is too high. If the fluid is too
viscous at the desired temperature, the stirring will be
inadequate resulting in poor control.
• Stirring motor or impellor is not operating properly.
Check stirring motor and impeller.
• Faulty RTD probe. Remove control RTD probe plug
and check resistance with an ohmmeter (apx. 100W at
Bath top surface temperature is too
high
• Defective fan. Check cooling fan on rear panel and in
top assembly.
Air bubbles in the bath fluid
• Fluid level is too low. Add fluid per manual
instructions. Refer to Filling the Bath if needed.
• Stirring impeller is on the shaft on the wrong
orientation. See Appendix I: Correcting Shaft &
Impeller Misalignment.
• Bath fluid is too viscous for operation at this
temperature. Replace with appropriate fluid. Refer to
Appendix II: Choosing a Temperature Bath Liquid
if
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