Cannon CT-500, Instruction & Operation Manual

Page: 37 / 49

CANNON Instrument Company | Troubleshooting 29
Troubleshooting
Refer to Table 4 to address issues with your CT-500 constant temperature bath.
Table 4: Troubleshooting Common Issues
Problem Probable Cause
Bath does not appear to have power
Power cable is not connected to outlet or rear electrical
drawer.
Over-temperature control is set too low.
Electric power is out.
Fuse needs replaced.
Bath Liquid not agitated
Check connection of stirring motor on rear panel.
Check impellor attachment to motor.
Bath has power but does not heat
Check connections for sensors on rear panel.
Check temperature setting – it must be above existing bath
temperature for heat to be applied.
Bath fluid level is too low.
Limit Control Temperature Adjust dial may be set too low.
Turn completely clockwise, then press PUSH TO RESET
button.
Bath control outside of specific limits
Bath fluid viscosity may be too high. if the fluid is too
viscous at the desired temperature the stirring will be
inadequate, resulting in poor control.
Check stirring motor and motor impeller for normal
function.
Possible thermistor problem. Remove thermistor probe
plug and check resistance with an ohmmeter (call CANNON
for information on correct values for resistance at bath
temperature).
Air bubbles in bath fluid
Fluid level may be too low.
Stirring impeller is on shaft with the wrong orientation.
Bath fluid is too viscous for operation at this temperature.