Check the device power on or not

Check adaptor connect well or not

Check the fuse fail or not

Check supply fail or not

Turn on/off frequently lead to compressor start up delay

Open doors frequently

Store too much cooked foods

No use in a long time

Low temperature, adjust higher

Normal, cryogen working

Normal

Normal, after speed comes to stable, noise slows down

Low battery protection, please lower theprotection level from H-M-L

Fan overload, turn off and then on 5mins later. If showF2 again, please contact with after-sale.

Fan overload, turn off and then on 5mins later. If showF3 again, please contact with after-sale.

Compressor's speed too low or too high, turn off andthen on 5mins later. If show F4 again, please contactwith after-sale.