SYMPTOM | DIAGNOSIS | REMEDY |
|
|
|
Both fan & compressor not running. | Fuse open or breaker tripped. | Inspect and repair. |
|
|
|
| Poor power plug connection. | Inspect. |
|
|
|
| Power failure. | Inspect. |
|
|
|
| Control circuit malfuction. | Replace parts. |
Compressor does not run. | Compressor motor windings open. | Replace compressor. |
|
|
|
| Compressor locked. | Replace compressor. |
|
|
|
| Defective overload. | Replace part. |
| Defective capacitor. | Replace part. |
|
|
|
| Control circuit malfuction. | Replace part. |
|
|
|
| Voltage drop at start. | Check supply wiring. |
|
|
|
| Pressure unequal at start. | Restart in 10 minutes. Inspect Control Circuit. |
|
|
|
Fan does not run. | Fan motor windings open. | Replace part. |
|
|
|
| Defective capacitor. | Replace part. |
| Control circuit malfunction. | Replace part. |
|
|
|
| Defective bearing. | Replace part. |
|
|
|
| Fan blade interference. | Inspect. |
|
|
|
Unit operates but does not cool. | Refrigerant circuit oil leak. | Leak repair and replenish gas. |
|
|
|
| Small or no sound of refrigerant flow. | leak repair and replenish gas, or |
| Low system temperature / pressure. | defective compressor. Replace part. |
|
|
|
| Small or no sound of refrigerant flow. | System restriction; replace capillary tube |
| High rise in temperature / pressure of | and strainer. |
| condenser (frost forms on evaporator). |
|
|
|
|
Poor cooling. | Incorrect thermostat setting. | Adjust. |
| Open door or window. | Correct. |
|
|
|
| Air inlet or outlet obstructed. | Correct. |
|
|
|
| Unit exposed to sun. | Draw curtains. |
| Additional heat sources or occupants. | Recalculate cooling load. |
|
|
|
| Poor installation location. | Consider relocation. |
|
|
|
| Incorrect cooling load calculation. | Recalculate cooling load, resize. |
| Dirty filter. | Clean filter. |
|
|
|
Overcooling. | Incorrect cooling load calculation. | Adjust fan speed and thermostat setting. |
|
|
|
|
| Recalculate cooling load, resize. |
|
|
|
High level of noise and vibration. | Compressor noise or vibration. | Check compressor mounting & isolation. |
|
|
|
| Tubing noise and vibration. | Redress tubing. |
|
|
|
| Fan motor noise or vibration. | Check fan motor mounting. |
|
|
|
|
| Check for broken fan blade. |
|
|
|
Radio noise and interference. | Defective electrical contact. | Repair. |
|
|
|
Water leaks. | Drain pipe blocked. | Inspect and repair. |
|
|
|
| Drain pipe blocked. | Inspect and repair. |
| Improper installation. | Inspect and repair. |
|
|
|
D2
