DC Inverter Duct Type Air Conditioner Installation and Operation Manual
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9. Troubleshooting and Maintenance
If your air-conditioning unit suffers from abnormal operation or failure, please rst check the owing points
before repair:
Table 12
Failure Possible Reasons
The unit cannot be started.
①
The power supply is not connected.
②
Electrical leakage of air-conditioning unit causes tripping of leakage switch.
③
The operating keys are locked.
④
The control loop has failure.
The unit operates for a while
and then stops.
①
There is obstacle in front of the condenser.
②
The control loop is abnormal.
③
Cooling operation is selected when the outdoor ambient temperature is above
43°C.
Poor cooling effect.
①
The air lter 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 thus cooling is hindered.
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 thus heating is hindered.
④
There is refrigerant leakage.
⑤
The outdoor ambient temperature is lower than -5°C.
⑥
Control line is abnormal.
Note:
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 Sinclair. Only ask professional serviceman to check and repair the
unit.
Routine Maintenance
1. Cleaning the Air Filter(Operating by the professional)
①
Do not disassemble the air lter when cleaning it. Otherwise failure may be caused
②
If the air-conditioning unit is used in an environment with much dust, you should clean the air filter
frequently (once every two weeks).
Cautions: You shall pay attention to the following matters when cleaning the air-conditioning unit.
● Cut off all power supply before contacting the line connecting equipment.
● Only clean the air-conditioning unit after the unit is shut off and the power supply is disconnected.
Otherwise electrical shock or injury may be caused.
● Do not use water to clean the air-conditioning unit. Otherwise there may be electrical shock.
● Take care when cleaning the air-conditioning unit. Use a steady stepping stand.
2. Maintenance at the Beginning of Operating Season
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