Thermo Fisher Circulating Water Bath 2869

Ensure a new temperature probe is installed into the bath

Connect the temperature probe connector to J302 on CPU board

Is the power switch in the OFF position?

Press and hold the SETPOINT key while turning Power ON

End the LED display test by pressing SETPOINT

Adjust display to read 0012 and press SETPOINT

Remove nuts and disconnect wires

Remove two hex nuts from heater ends using a 13/16" socket

Reconnect wires and secure nuts

Is the heater securely installed?

Remove connectors from CPU board

Remove connector J102 from power supply board with care to avoid bending pins

Remove four nuts from CPU board and remove CPU board and Keyboard/Display board

Remove J201 from CPU board with care to avoid bending pins

Reverse removal procedure to install new board

Clean the bath with mild soapy water.

Rinse the bath with distilled water.

Add formaldehyde or quaternary ammonium germicide if algae or microorganisms are present.

Ensure the following chemicals are never used

Limit the use of necessary chemicals to a maximum of four hours.

Clean surfaces immediately after using chemicals.

Remove connector J302 from CPU board

Remove rubber grommet from temperature sensor

Carefully slide sensor through the control housing and remove

Remove temperature sensor fitting

Hold small nut on fitting firmly with a wrench