Carrier Container Refrigeration Unit 69NT40-511-16

Prepare an ice-water bath at 0°C (32°F)

Ensure the ohmmeter is calibrated and ready for use

Sensor Placement and Initial Check

Place the sensor in the ice-water bath

Check air temperature/data readout on the control panel

Is the air temperature/data readout 0°C (32°F)?

Cut wires to 25.4 cm (10 inches) from the back of the mounting stud of the defective sensor and discard.

Cut one of the two wires 25.4 mm (1.0 inch) shorter than the other wire.

Cut one replacement sensor wire back 25.4 mm (1.0 inch).

Strip back insulation on all wiring 6.35mm (1/4 inch).

Evacuate the unit as per section 6.5

Open the manual liquid line valve

Inspect for moisture in system after unit is in operation

Select the method for temperature stabilization

Set the unit's set point to 0°C (32°F)

Allow the unit to pull down to 0°C (32°F)

Enter the number of compressor ON-OFF cycles observed

Record the temperature indicated by the thermometer when the compressor cycles off

Does the temperature differ from 0°C (32°F) by more than 0.6°C (1°F)?

Open door and remove chart nut and platen.

Push voltage indicator test switch. Is the voltage indicator in the red or white zone?

Replace battery if voltage indicator points to the red or white zone.

Place recorder bulb in ice bath for 10 minutes.

Rotate the chart by hand and check the stylus indicated temperature.