This document is the user manual for the MR.FROZEN DC 12/24V Freezer, a portable freezer designed for various applications, including solar power systems and vehicle use.
Function Description:
The MR.FROZEN DC 12/24V Freezer utilizes a high-performance DC compressor, offering excellent cooling capabilities with low noise and minimal vibration. Its cabinet features super-thick foam insulation, ensuring superior heat preservation and energy efficiency. The freezer is equipped with a microcomputer for precise temperature control and accurate internal temperature display, making operation straightforward via button presses. It supports two compressor operating modes: "Max" for full-speed operation and "Eco" for economical running. The freezer can be directly powered by DC 12V or 24V sources. A key feature is its three-level battery voltage protection system (H/M/L), which prevents excessive battery discharge when connected to a solar power system or a standalone battery. Users are advised to set the protection to "H" when ample power is available and "L" when power supply is limited. The device also includes a memory recovery function, retaining set temperature, cut-off voltage, and Max/Eco mode settings even after being powered off.
Important Technical Specifications:
The manual provides specifications for several models:
-
MR FROZEN BD/BC-108:
- Volume: 3.3 Cu.ft [94 L]
- Freezer Temperature Range: -0.4°F to 50°F
- Input Voltage: 12/24V
- Refrigerant: R134a
- Power Consumption: 65W
- Defrost: Manual
- External Dimensions: 22-51/64 x 21-57/64 x 33-1/2 IN
-
MR FROZEN BD/BC-158:
- Volume: 4.8 Cu.ft [136 L]
- Freezer Temperature Range: -0.4°F to 50°F
- Input Voltage: 12/24V
- Refrigerant: R134a
- Power Consumption: 70W
- Defrost: Manual
- External Dimensions: 29-1/2 x 21-57/64 x 33-1/2 IN
-
MR FROZEN BD/BC-208:
- Volume: 6.2 Cu.ft [175 L]
- Freezer Temperature Range: -0.4°F to 50°F
- Input Voltage: 12/24V
- Refrigerant: R134a
- Power Consumption: 75W
- Defrost: Manual
- External Dimensions: 35-45/64 x 21-57/64 x 33-1/2 IN
-
MR FROZEN BD/BC-268:
- Volume: 7.7 Cu.ft [218 L]
- Freezer Temperature Range: -0.4°F to 50°F
- Input Voltage: 12/24V
- Refrigerant: R134a
- Power Consumption: 84W
- Defrost: Manual
- External Dimensions: 42-13/64 x 22-1/2 x 33-45/64 IN
-
MR FROZEN BD/BC-358:
- Volume: 11.6 Cu.ft [328 L]
- Freezer Temperature Range: -0.4°F to 50°F
- Input Voltage: 24V
- Refrigerant: R134a
- Power Consumption: 125W
- Defrost: Manual
- External Dimensions: 50-5/11 x 23-13/32 x 34-27/32 IN
-
MR FROZEN BD/BC-508:
- Volume: 16.8 Cu.ft [475 L]
- Freezer Temperature Range: -0.4°F to 50°F
- Input Voltage: 24V
- Refrigerant: R134a
- Power Consumption: 164W
- Defrost: Manual
- External Dimensions: 60-3/64 x 26-37/64 x 34-1/4 IN
Cable Size Recommendations:
The manual provides a table for recommended cable sizes based on cross-section (mm² and AWG) for both 12Vdc and 24Vdc systems, indicating maximum lengths in feet and meters to ensure proper power delivery. For example, a 2.5 mm² (AWG 12) cable is suitable for 3.2 ft (1 m) at 12Vdc, while a 10 mm² (AWG 7) cable can extend up to 8.2 ft (2.5 m) at 12Vdc or 16.4 ft (5 m) at 24Vdc.
Operating Voltage Fuse:
Cut-off Voltage Data Sheet:
This feature protects the battery from over-discharge. The cut-off voltage and recovery voltage vary depending on the selected level (L, M, H) and the system voltage (12V or 24V).
- 12V System:
- L: Cut-off at 10.0V, recovers at 11V
- M: Cut-off at 10.7V, recovers at 11.7V
- H: Cut-off at 11.5V, recovers at 12.5V
- 24V System:
- L: Cut-off at 21.6V, recovers at 23.0V
- M: Cut-off at 22.6V, recovers at 24.0V
- H: Cut-off at 24.6V, recovers at 26.0V
Usage Features:
- Operation Panel: The panel includes buttons for temperature display, Max/Eco mode selection, voltage cut-off switch (UVP), power on/off, and temperature adjustment (up/down).
- Power On/Off: Press the power switch for 3 seconds.
- Temperature Setting: Press the "SET" button once to set the temperature, then use the up/down buttons.
- Max/Eco Mode: Press the corresponding button to switch between quick freezing (Max) and power-saving (Eco) modes.
- UVP Setting: Press the "UVP" button to cycle through H, M, L battery protection levels.
- Initial Setup: Before connecting to power, let the unit stand upright for approximately 2 hours to prevent cooling system malfunctions. It is recommended to store contents only after the cabinet temperature drops below 0°C.
- Storage Practices: Maintain appropriate gaps between stored items for better cold air circulation and heat exchange. Always cool food or drinks before placing them in the freezer.
- Reboot Delay: A 5-minute power-off time is necessary before rebooting the freezer to protect the compressor.
- Energy Saving: Avoid opening the door more than necessary or for extended periods. Choose an appropriate temperature setting to prevent unnecessary freezing and power waste.
- Pre-cooling: Set a lower temperature before an expected power outage to allow the compressor to work longer and reduce door openings during the outage.
Maintenance Features:
- Cleaning: Clean the freezer with a soft cloth moistened with lukewarm water. Do not use solvents, abrasive cleaners, scourers, or scrapers, as these can damage the freezer. Dry the cabinet completely with a soft, dry cloth after cleaning.
- Long-term Storage: If the refrigerator will be disabled for a long time, cut off power, clean it, and leave the door open for a few days to ensure the interior is dry.
- Electrical Safety: Prevent water drops from entering the vents to avoid damage to electrical components. After maintenance, check that the DC plug is properly seated, not overheated, and that the DC power cord has no cracks or scratches.
- Defrosting: Water vapor may form ice on the inner cabinet, reducing cooling performance. Defrost the freezer when the frost layer reaches 5-7mm.
- Freeze contents at the lowest temperature for a period to prevent melting during power-off.
- Power off the freezer, remove contents, and prevent them from melting.
- Open the door and wipe off the frost layer as it melts.
- Dry the cabinet with a clean towel, then power on the freezer and return the contents.
- Caution: Do not use sharp items to defrost to avoid damaging the evaporator.
Troubleshooting (Common Issues and Solutions):
- No Cooling Function: Check if voltage is normal, power cord is connected well, and adapter is connected well.
- Bad Cooling Effect: Ensure the product is not exposed to sunlight or heat sources, compressor/condenser is not covered with dust, content inside is not excessive or hot, and door seal is good.
- Non-stop Operation: Check for excessive frost, high ambient temperature, or too many hot items inside.
- Big Noise: Ensure the floor is even and stable, the product is installed evenly, and the back of the freezer is not too close to the wall.
- Error Indications:
- Err0: Malfunction of temperature sensor.
- Err1: Over voltage or under voltage.
- Err2: Big current on cooling fan.
- Err3: Bad heat dissipation and lock-rotor of compressor.
Normal Phenomena (Not Troubles):
- Frost on the surface due to high ambient temperature or frequent door opening (can be wiped off).
- Sound of water flow or boiling, which is normal refrigerant flow.
- Compressor and condenser heating during operation.
- Compressor working for a long time when storing too much hot food or when ambient temperature is very high.
For unresolved issues, contact the distributor or local service center; do not disassemble without expert guidance.
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