4
Unused
●
Maintenance
1
Leave Unused
：
If the unit is not used for long time, please disconnect power
supply and maintain as the following procedures. For next time operation, ensure
there is not any water around the liners to avoid the seal of door is frozen.
2
Note
：
Any electric heater, metal tool or edge tool CAN NOT be used during defrost
operation.
Note
：
DO NOT sprinkle water on the faces of cabinets, which may decrease
insulating property of electric parts and rust metal parts.
DO NOT use hot water, corrosive cleanser and organic solve
nt!
5
Service after sale
Some unexpected failures may arise during running. Please pay attention to the running
status of your ULT freezer. If any exceptional case arises, please check and solve it
according to the following introductions. If the problem is not solved well, please contact
our service center for details.
Problem
Possible Cause
℃
4 storage refrigerator
does not operate
Power outage has occurred.
The plug is bad or not securely plugged-in.
Fuse is blown.
Voltage is too low or too high.
Compressor does not work
Power in control panel is off.
Temperature setting is wrong.
Temperature is higher than
setting
Frost in inner wall is too thick
The door is not closed properly or is opened too frequently.
Overfull materials are put into chamber.
Ambient temperature is too high.
Too great noise
Freezer is not leveled well.
Freezer leans upon the wall.
8