Brand: SANYO
Category: Commercial Solutions
Document Type: Manual
Language: EN
Manual for MDF-U72V
Uploaded: Nov. 21, 2025, 6:34 p.m.
Manual Publish Date: 2005-04-05
Warranty Information
Refer to Sanyo sales agency for battery replacement and recycling.
Starting Up the Unit:
- Connect the power cord to a suitable outlet and turn on the power switch.
- If a back-up system is installed, turn off its switch.
- Ensure the battery switch is ON.
- If an audible alarm sounds, press the BUZZER key to silence it.
- Set the desired chamber temperature (refer to page 18).
- Confirm the chamber temperature has reached the set point.
- Turn on the back-up system switch if installed.
- Test the alarm system by pressing the ALARM TEST key.
- Once confirmed, gradually add articles to the freezer.
Operation After Power Failure: The freezer automatically resumes operation with the previously set temperature after a power failure, as settings are stored in nonvolatile memory.
Troubleshooting and error codes
| Malfunction | Possible Cause | Remedy |
|---|---|---|
| Chamber is not cooled at all | Circuit breaker of power source is active. | None |
| Voltage is too low. (Status code "--2" displayed) | Call an electrician. | |
| Power switch is not ON. | Turn on the power switch. | |
| Large amount of articles stored at once. (Status code "--3" displayed) | Reduce the load. | |
| Direct sunlight. | Relocate the unit away from direct sunlight. | |
| Cooling is poor | Ambient temperature is too high. (Status code "--1" displayed) | Recheck air-conditioning of installed site. |
| Inner door latch not closed completely. Outer door not sealed firmly. | Ensure doors are closed properly. Check for frost buildup. | |
| Air intake vent is blocked. | Clean the air intake vent. | |
| Condenser filter is clogged. | Clean the filter when the filter check lamp is lit. | |
| Set temperature not inputted properly. | Re-enter the set temperature. | |
| Heating source nearby. | Relocate the unit away from heat sources. | |
| Access port rubber cap and insulation not set correctly. | Ensure the access port is properly sealed. | |
| Too many unfrozen articles stored. | Store articles in small batches. | |
| Independent inner door installed. | Adjust ambient temperature or set chamber temperature higher. | |
| Alarm test key cannot actuate alarm | Power switch is OFF. | Turn power switch ON. |
| Part of the alarm system is faulty. | Contact service personnel. | |
| Noise | Unit not installed on sturdy floor. | Ensure floor is level and sturdy. |
| Something touching the frame. | Check for obstructions. | |
| Unit not leveled with leveling feet. | Adjust leveling feet. | |
| Immediately after start-up, or high load condition. | Normal operation, noise decreases as it cools. | |
| Back-up test switch does not operate normally | Liquid CO2 tank is empty. | Inquire with CO2 supplier. |
| Valve of CO2 tank not opened. | Inquire with CO2 supplier. | |
| Ambient temperature is too high. | Move tank to a cool location. Inquire with CO2 supplier. |