Carrier Container Refrigeration Unit 69NT40-511-15

Checking the Refrigerant Charge

Ensure compliance with environmental laws

Is the controller set point at --25_C (--13_F)?

Is the suction modulation valve fully open?

Connect the gauge manifold to the compressor discharge and suction service valves

For Units equipped with receiver

Partially block the condenser coil inlet air

Enter the compressor discharge pressure

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).

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 resistance thermometer

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

Open the manual liquid line valve

Ensure a pressure regulator is used with the nitrogen cylinder

Ensure no oxygen is present near the refrigeration system

Remove switch as outlined in section 6.12.1

Connect ohmmeter or continuity light across switch terminals

Connect hose to a cylinder of dry nitrogen