DC Inverter U-match Series Duct Type Unit
35
Failure
Possible Reasons
Poor cooling effect.
①
.
The air filter is dirty or blocked.
②
.
There is heat source or too many people inside the room.
③
.
The door or window is open.
④
.
There is obstacle at the air intake or 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 filter is dirty or blocked.
②
.
The door or window is not firmly closed.
③
.
The set room temperature is too low.
④
.
There is refrigerant leakage.
⑤
.
The outdoor ambient temperature is lower than -5°C (23°F).
⑥
.
Control loop is abnormal.
After carrying out the check of the above items and taking relevant measures to
solve the problems found but the air-conditioning unit still does not function well, please
stop the operation of the unit immediately and contact the local service agency
designated by
TOSOT
. Only ask professional serviceman to check and repair the unit.
8.2 Routine Maintenance
Only a qualified service person is allowed to perform maintenance.
Before accessing to terminal devices, all power supply circuits must be
disconnected.
Do not use water or air of 50°C (122°F) or higher for cleaning air filters and outside
panels.
①
.
Do not operate the air conditioner with the filter uninstalled, otherwise dust would come into the
unit.
②
.
Do not remove the air filter except for cleaning. Unnecessary handling may damage the filter.
③
.
Do not clean the unit with gasolene, benzene, thinner, polishing powder or liquid insecticide,
otherwise it would cause discoloration and deformation of the unit.
WARNING!
Do not wet the indoor unit in case of electric shock or fire hazard.
Increase the frequency of cleaning if the unit is installed in a room where the air is
extremely contaminated.
(As a yardstick for yourself, consider cleaning the filter once a
half year.)
