The Japanese manufacturer Sanyo Electric Co. provided the tables below so as to make air conditioner troubleshooting easier not only for professional service engineers, but for homeowners as well. Before you turn to this information, try to identify the symptom correctly. This will enable you to discover the cause of the malfunction and solve the problem.
Sanyo RCS-BH80UA.WL air troubleshooting
| Trouble | Possible Cause | Remedy |
| Air conditioner does not run at all. | 1. Power failure | 1. Restore power. |
| 2. Leakage circuit breaker has tripped. | 2. Contact service center. | |
| 3. Line voltage is too low. | 3. Consult your electrician or dealer. | |
| 4. Operation button is turned off. | 4. Press the button again. | |
| 5. The remote control unit or heat pump is malfunctioning. (ERROR and characters such as E, F, H, L, P, etc., appear on the display.) | 5. Consult your dealer. | |
| Compressor runs but soon stops. | 1. Obstruction in front of condenser coil | 1. Remove obstruction. |
| Poor cooling (or heating) performance | 1. Dirty or clogged air filter | 1. Clean the air filter to improve the airflow. |
| 2. Heat source or many people in room | 2. Eliminate heat source if possible. | |
| 3. Doors and/or windows are open. | 3. Shut them to keep the heat (or cold) out. | |
| 4. Obstacle near air intake or air discharge port | 4. Remove it to ensure good airflow. | |
| 5. Thermostat is set too high for cooling (or too low for heating). | 5. Set the temperature lower (or higher). | |
| 6. (Outdoor temperature is too low). | 6. (Try to use a back-up heater.) | |
| 7. (Defrosting system does not work.) | 7. (Consult your dealer.) | |
| “CHECK” is displayed. | 1. Trouble in the system | 1. Contact service center. |
Sanyo STW-2 Series air troubleshooting
| PROBLEM | POSSIBLE CAUSE |
| AIR CONDITIONER DOES NOT OPERATE | • The power cord is not plugged in or circuit breaker is tripped. |
| AIR CONDITIONER ‘DOES NOT COOL OR HEAT AS IT SHOULD” | • The unit is waiting for the compressor overload protector to reset. |
| • Curtains, blinds or furniture blocking the front of the air conditioner are restricting the air flow. | |
| • Thermostat control may not be set high/low enough. Turn the control to a lower or higher position. (NOTE: In some installations, the thermostat control cannot be turned all the way to the highest end or lowest end. This is normal. Do not attempt to force the control beyond its stopping points.) | |
| • A dirty air filter is blocking air flow. The filter should be cleaned at least once every 2 weeks. | |
| • The room may have been very hot or very cold when the air conditioner was first turned on. Allow time for it to cool down or warm up. | |
| • The ventilation control may be set to the OPEN position, allowing outside air to enter the room. | |
| BURNING ODOR AT START OF HEATING OPERATION | • Dust on the surface of the electrical heater can cause a “burning” odor at the beginning of the heating opera- tion. This odor should quickly fade. |
| OPERATING SOUNDS | • Relay clicks may be heard when the compressor or fan cycles on and off. This is normal. |
| • The fan runs continuously when the unit is operating unless the Fan Cycle Switch under the control panel is set to CYCLE. In this case, the fan cycles on and off with the electrical heater or compressor. | |
| AIR IS NOT ALWAYS COOL DURING COOLING OPERATION | • The Fan Cycle Switch may be set to Fan Cont (continuous). This causes the fan to blow room air even when the compressor is off. The continuous air flow provides better overall tem- perature control. |
| AIR IS NOT ALWAYS HOT DURING HEATING OPERATION | • The Fan Cycle Switch may be set to Fan Cont (continuous). This causes the fan to blow room air even when the electrical heater is off. The contin- uous air flow provides better overall temperature control. |