Carrier Container Refrigeration Unit 69NT40-511-7

Turn power OFF and remove power plug

Remove screws securing the panel covering the evaporator section (upper panel)

Disconnect the defrost heater wiring

Disconnect the sensor from the coil

Checking the Refrigerant Charge

Set the controller set point to -25°C (-13°F)

Ensure the suction modulation valve is fully open

Connect the gauge manifold to the compressor service valves

Is the refrigerant level between the sight glasses for units with receiver?

Is the refrigerant level at the center line of sight glass for water-cooled condenser?

Adding Refrigerant to System (Full Charge)

Evacuate unit and leave in deep vacuum

Place cylinder of R-134a on scale and connect charging line

Handling of Controller/DataCORDER

Ensure all safety precautions are followed

Obtain a grounding wrist strap and a static dissipation mat

Disconnect and secure power to the unit

Place strap on wrist and attach the ground to an unpainted metal area on the refrigeration unit frame

Carefully remove the Controller/DataCORDER and place it on the static mat

Is the refrigeration unit service completed?

Re-install the module into the refrigeration unit after service work

Removing and Installing the Controller/DataCORDER Module

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).

Remove the protective guard from lower section of the unit.

Remove all refrigerant using a refrigerant recovery system.

Locate the compressor junction box and remove wiring.

Disconnect wiring from compressor terminals and remove compressor junction box.

Remove bolts from service valve flanges.

Remove compressor plate mounting bolts.

Remove compressor and mounting plate.

Remove high pressure switch (HPS) from compressor and check operation of switch.