
Carrier Reefer Container User Guide
Check out our comprehensive Carrier reefer user manual. We will update the manual with answers to our clients’ frequently asked questions and our newest instruction videos.



Contents
1. Power requirement
- The reefer container requires a 32A/400V 5-pin connection to operate.
- Using 16A/400V power is prohibited and may cause equipment failure.
2. Startup
- Connect the container to the power supply.
- Start the machine by pressing the ON/OFF button for 2 seconds.
- The machine will start and initiate the startup process.
- After the process is complete, you can begin using it.
3. Ventilation
- When the frozen load is between -0°C and -40°C, the ventilation disc must be kept closed.
- We recommend adjusting the ventilation disc to suit the load inside the container. This can help preserve, for example, fresh food. Here are some general guidelines:
- Onions 10-40 m3/h
- Apples 10-60m3/h
- Bananas 25-60m3/h
- The ventilation is adjusted using the ventilation disc on the machine. Refer to section 4 for detailed instructions on ventilation adjustment.
4. Ventilations adjustment
The adjustment disc on top of the controller at the machine end operates manually.
- Turn off the machine.
- Loosen the wingnut.
- If the disc is stuck, gently nudge the disc loose with a flat object (e.g. screwdriver).
- To adjust the airflow amount, turn the disc counterclockwise to increase airflow and clockwise to decrease it. Align the dot on the outer edge of the disc with the corresponding label marked on the disc (e.g., 50m³/h = 20%).
- Finally, tighten the wingnut to secure the disc in place.

5. Temperature adjustment
Note: You can find the same instructions in the accompanying video (with English subtitles). If you don’t see the video, enable cookies by clicking the round blue icon in the bottom left corner.
- The indoor temperature of the container can be seen on the left screen.
- Press the blue arrow keys on the control panel to adjust the indoor temperature. Press the left arrow key to raise the temperature and right arrow key to lower the temperature.
- When the temperature on the left screen starts to blink, confirm the desired temperature by pressing the ENTER button (above the arrow keys).
6. Cargo storage
- Do not exceed the maximum loading height limit marked inside the container with labels.
- The cargo should be placed on pallets to allow air circulation on the floor.
- Do not place cardboard boxes at the machine end without pallets, as this prevents air circulation.
- Do not place shelves at the machine end in a way that fills both the bottom and top of the wall with goods. The machine will not function properly, causing freezing.
7. Locking
- The container must be locked with a separate padlock.
- If the container has an access door, also secure it with a separate padlock.
8. Washing / Cleaning / Maintenance
- Maintenance washing is done with a pressure washer. However, avoid the openings at the machine end.
- Wipe off any spilled food waste or other products as quickly as possible.
- If cleaning agents must be used, their pH value should be between 7-9 and they must be suitable for food and stainless steel/aluminium surfaces. Using the wrong agent can damage the container’s surfaces and machinery.
- When renting a reefer container, remember that the use of cleaning agents is prohibited without separate permission from MC Containers.
9. Lights and alarm
- The lights are operated by a switch located next to the door inside the container.
- The container’s alarm is activated by a button located above or below the light switch.
10. Door usage
- If the container is equipped with an internal emergency opener (strap), do not pull the door closed using it, as it will damage the mechanism.
- Keep the doors closed whenever you are not inside the container.
- If the internal temperature of the container is between 0°C and -40°C, the doors may be tight due to the vacuum formed inside. Do not force the doors open. Instead, turn off the machinery, open the ventilation disc to 20%, wait 5 minutes, and then open the door. After closing the doors, reverse these steps.
11. Storing the container when not in use
- If you turn off and plan to store the container, we recommend the following actions:
- Wash the container thoroughly.
- Open the ventilation disc to approximately 20% to allow air circulation.
12. Prohibited use
- The container must not be used to store chemicals or products that contain or produce sulfur dioxide (SO₂).
- The container must not be used to store chemicals that react with aluminum or stainless steel.
- If there is a chemical spill in the reefer container you have rented, you must immediately notify MC Container in writing.
13. In case of malfunction
- Check that the container has been packed according to this user guide’s section 6. “Cargo storage”. Faulty packing of the container may prevent the container from functioning properly.
- Check the possible fault codes shown on the container’s screen. Container automation recognizes the errors in 99 % of situations. If there is no fault code, 90 % of the errors are caused by faulty packing or disturbances in power supply.
- Check the definition of the occurred fault code from the container’s manual.
- Contact us for assistance.