Use and Care Manual

31
Poor cooling effect.
① .
The air lter is dirty or blocked.
② .
There are heat sources or too many people inside the room.
③ .
The door or window is open.
④ .
There is obstacle at air inlet or air outlet.
⑤ .
The set temperature is too high.
⑥ .
There is refrigerant leakage.
⑦ .
The performance of room temperature sensor becomes worse
Poor heating effect
① .
The air lter is dirty or blocked.
② .
The door or window is not rmly closed.
③ .
The set room temperature is too low.
④ .
There is refrigerant leakage.
⑤ .
The outdoor ambient temperature is lower than -5°C(20°F).
⑥ .
Control loop is abnormal.
Note: After checking above items and taking relevant measures to deal it them, if the air conditioner
still is not operating normally, please stop operation immediately and contact the local service center.
Only ask qualified service technician to check and repair the unit.
7.2 Routine Maintenance
NOTICE
① .
When the filter hasn't been installed, do not operate the air conditioner, otherwise, dust
would come into the unit.
② .
Do not remove the air filter except for cleaning. Unnecessary handling may damage the
lter.
③ .
Do not clean the unit with gasolene, benzene, thinner, polishing powder or liquid insecticide,
otherwise it would cause discoloration and deformation .
WARNING! Do not wet the indoor unit may cause electric shock or re hazard.
Increase the frequency of cleaning if the unit is installed in a room where the air is extremely
contaminated.( cleaning the lter once every 3 months.)
If dirt becomes impossible to be cleaned, replace the air lter.
U-match Series Cassette Type Unit