Carrier Container Refrigeration Unit 69NT40-511-18

Inspect the refrigeration unit for paint damage

Clean the damaged area to bare metal using a wire brush, emery paper, or equivalent method

Apply zinc-rich primer to the cleaned area

Has the primer dried completely?

Apply finish coat of paint to match original unit color

Select the method for temperature stabilization

Set the unit 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

Enter 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 compressor cycles off?

Remove the refrigerant charge per section 6.3

Remove the condenser coil guard

Unsolder discharge line and remove the line to the receiver or water-cooled condenser (if so equipped)

Remove coil mounting hardware and remove the coil

Install replacement coil and solder connections

Leak-check the coil per section 6.4

Evacuate the unit per section 6.5

Charge the unit with refrigerant per section 6.6.1

Turn unit power OFF and disconnect power supply.

Remove and save any cover over wiring and probe holder, if present.

Cut cable 5 cm (2 inches) from shoulder of defective sensor and discard the defective probe only.

Save cap and grommet assembly for reuse on the replacement probe.

Cut one wire of existing cable 41 mm (1-5/8 inches) shorter than the other wire.

Cut one replacement sensor wire (opposite color) back 41 mm (1-5/8 inches).

Ensure excess capillary tube is secured to the power head assembly and wrapped with 'Presstite'.

Ensure thermal bulb is tightly secured to the suction line and wrapped with 'Presstite'.

Pump down the unit per section 6.3.

Remove insulation (Presstite) from expansion valve bulb and power assembly and then remove thermal bulb from the suction line.

Loosen flare nut and disconnect equalizing line from expansion valve.

Remove capscrews and lift off power assembly and remove cage assembly. Check for foreign material in valve body.

Ensure the area below the center of the suction line (4 o’clock position) is clean for positive bulb contact.