Brand: Haier
Category: Refrigerators
Document Type: Manual
Language: EN
Manual for DW-40L508
Uploaded: Nov. 21, 2025, 8:42 p.m.
Warranty Information
The freezer is guaranteed for one year, with main components guaranteed for three years.
The freezer adopts computer control and digital temperature display, adjustable from +20°C to -45°C, with a normal operating range of -20°C to -40°C. It features power-on time delay protection and an internationally famous compressor. It's designed for cryopreservation of blood, biomaterials, vaccines, electronic components, and low-temperature testing. Regular maintenance includes cleaning and defrosting. The manual covers installation, use, temperature adjustment, display and alarm functions, routine maintenance, fault clearance, and equipment scrapping. It also details battery maintenance and optional temperature recorder installation.
Troubleshooting and error codes
| Alarm | State | Fault code | Indication | Buzzer |
|---|---|---|---|---|
| High temperature alarm | When the internal temperature is higher than the set temperature for high temperature alarm | E9 | The indicator flashes | When the freezer is turned on for the first time, the buzzer alarm function is activated after 5 hours according to the default settings; in normal operation, the buzz alarm is given after 15min |
| Low temperature alarm | When the internal temperature is lower than the set temperature for low temperature alarm | E10 | The indicator flashes | The buzzer alarm is given after 30s |
| Power-down alarm | Power-down of the freezer | / | The indicator flashes; black screen and actual internal temperature show alternately | |
| Over-high ambient temperature alarm | Ambient temperature above 38°C | E14 | The indicator flashes | Buzz alarm |
| Main sensor fault alarm | Internal main sensor at fault | E6 | The indicator flashes | Buzz alarm |
| Ambient temperature sensor at fault | Ambient temperature sensor at fault | E0 | The indicator flashes | |
| Low battery charge level or battery switch is not on | Battery charge is not on or the battery switch is not on | E5 | The indicator flashes 3 times |