Because the elevator air conditioner is a part of the whole elevator, the environmental conditions are relatively harsh, and the environment of the hoistway is relatively dusty. During the process, regular cleaning and maintenance are required to improve the cooling effect, save electricity, and prolong the service life of the air conditioner. It is generally completed by elevator maintenance personnel or the user's elevator maintenance personnel. If our company needs to provide additional separate billing, the main contents are as follows:
1. Clean 3 filters on the main unit of the air conditioner (2 external and 1 internal); maintenance frequency: It depends on the actual situation, and it is generally recommended to clean it every 30 days;
2. Regularly check the temperature and noise in the elevator car;
3. Regularly check the operation status of the air conditioner by a special person;
4. Before using in summer every year, clean the condensate treatment pump of the air conditioner and replace the filter material around the pump;
5. In case of abnormal operation, shut down immediately and ask a professional to check the cause.
※Possible risks of lack of cleaning and maintenance of elevator air conditioners: a. The cooling effect becomes poor; b. The energy consumption increases; c. The compressor heat dissipation deteriorates and the life expectancy is shortened; d. The condensate evaporation capacity of the air conditioner deteriorates, which may be caused by Water level protection and suspend compressor operation
| Fault phenomenon | Cause Analysis | Exclusions |
| No receiving sound comes out when pressing the remote control button | Whether the display of the remote control is clear and whether the infrared receiving probe is blocked | Maybe the battery voltage of the remote control is insufficient, replace the battery and adjust the position and direction of the infrared receiving probe |
| When the program-controlled timer switch mode is running, the air conditioner cannot be turned on | Whether the time setting is correct and whether the "programmed" light is on | Correctly set the clock and timer switch time After the timing setting is completed, the air conditioner needs to be programmed to turn on. When the "programmed" light is always on, the air conditioner will run according to the set time. |
| The fan does not stop when shutting down | Whether the water level indicator is higher than 20% | If there is a lot of condensed water during shutdown, the water treatment system will continue to work, and the fan motor will automatically shut down when the water level drops below 20%. |
| The air volume is too small and the air outlet temperature is low | Whether the ventilation area of the air inlet and outlet is too small Whether the dust filter is blocked, whether the evaporator is frozen or blocked by dust Whether the air speed of the remote control is set to low wind Whether the inlet and outlet ventilation hoses are squashed | The cross-sectional area of the return air passage should be greater than 130 cm², and the cross-sectional area of the supply air passage should be greater than 90 cm²; to remove dust or ice on the surface of the filter screen and the evaporator, the wind speed should be set to high wind The ventilation area of the inlet and outlet hoses should not be less than the above data |
| Occasionally no cooling | Whether the ambient humidity is particularly high, and whether the water level is displayed at 80% | Clean the dust filter and the dust on the two devices. Unscrew the drain plug on the main chassis to drain the water. |
| Cool for a while, not cool for a while | Is the temperature set too high? Is the temperature probe fixed loose? It will be directly blown by the cold wind | Lower the temperature setpoint, adjust the temperature probe fixation and adjust the position |
| There is a lot of condensation around the air outlet | Whether the cold air can blow directly to the metal surface | Stick the heat insulation sponge, so that the cold air does not directly contact the metal surface |
| No cooling, the running indicator flashes every four seconds | Whether the temperature probe is damaged and whether the plug is in good contact | Replace the temperature probe and re-plug the plug |
| No cooling, the running indicator flashes twice every four seconds | Whether the water level display is normal, whether there is foreign matter in the conductive part of the water level probe, whether the probe plug is in good contact | Remove foreign objects from the water level probe, reinsert the water level probe and make it in good contact |
| Often without refrigeration for long periods of time | Is the 80% water level indicator always on? | Unscrew the plug screw on the chassis of the main unit and drain the water. Check whether the high temperature water pump, water pipe and seepage tank are dirty and blocked. Clean it with clean water to check whether the filter cotton of the pump is dirty and blocked, and replace the filter cotton with a new one. |
