| Less Cooling |
1 |
Supply air is cold but room is not cooled. |
1 |
Excessive cooling load. |
1 |
Room is too large for chosen capacity. |
1 |
Recalculate the cooling load. |
| 2 |
Direct sunlight enters the room being cooled. |
| 3 |
Doors are opened and closed frequently or room contains too many persons. |
| 4 |
Heat sources such as heaters and cooking stoves, etc. are present. |
| 2 |
Unsuitable installation location. |
1 |
Check if room air conditioner is installed in corner. |
1 |
Change installation location. |
| 2 |
Check for any obstructing object in front of room air conditioner. |
2 |
Remove any obstructing object. |
| 3 |
Insufficient air flow. |
1 |
Dust accumulates in the air filter. |
1 |
Wash out the dust on the air filter. |
| 2 |
Dust adheres to fins which causes less air flow. |
2 |
Clean the fins with brush and water. |
| 2 |
Compressor is operating, but supply air is not cooled sufficiently. |
1 |
Defective refrigerating cycle. |
1 |
Refrigerant leakage from the brazed section in piping. |
1 |
Check each section with halogen gas leak detector and repair it immediately when a leaking section is detected. |
| 2 |
Ambient condition. |
2 |
Compressor becomes over-loaded and stops with the actuation of overload relay. |
2 |
Check for direct sunlight on air conditioner. |
| 3 |
Compressor stops soon after starting. |
1 |
Variation of power source voltage and power source capacity. |
1 |
Supply voltage is not in range of +/-10% of rated. |
1 |
Use stabilizers for regulated power supply. |
| 2 |
Ambient condition. |
2 |
Compressor becomes over loaded and stops with the actuation of overload relay. |
2 |
Check for any sunlight on air conditioner. |
| 3 |
Compressor running capacitor becomes poor or disconnected. |
3 |
Check electrical wire and compressor running capacitor with capacitor. |
3 |
Replace the defective capacitor. |
| 4 |
Defective refrigerating cycle and overload. |
4 |
Measure the voltage and current abnormality. |
4 |
Repair refrigerating cycle and overload relay. |
| 5 |
Defective compressor. |
5 |
Check compressor winding resistance and compare with specification. |
5 |
Replace any defective compressor. |