Analysis of the reasons why the thawing machine cannot be started

　　What is the reason why the thawing machine does not start when it is turned on, and there is no action? The following editor will analyze for you the following factors that cause the thawing machine to not start, for your reference!

　　1. Whether the refrigeration compressor starts normally

　　1. Is the transmission belt broken or loose? If the transmission belt is too loose, it will slip, accelerate wear and fail to transmit power.

　　2. Is there any noise inside the compressor?

　　Possible reasons: The noise may be caused by damaged internal parts. Internal wear prevents effective compression.

　　2. Reasons for condenser and fan

　　1. Whether the condenser heat sink is covered with dust

　　Possible reasons: If the condenser fins are covered with dust, the efficiency of the condenser will be greatly reduced.

　　2. Check whether the condenser fan is operating normally.

　　3. Condenser fan operation

　　Note: Run the fan at three speeds: "low, medium and high". If there is any abnormal noise or the motor is not running properly, it should be repaired or replaced, otherwise the air supply airflow will be insufficient.

　　4. Inspection of refrigerant liquid volume

　　1. If you see a large number of bubbles through the observation window, it means there is insufficient refrigerant. If you pour water on the condenser to cool it down and there is still no foam visible in the observation window, it means there is excess refrigerant.

　　2. Check the connections and seams of each device for oil stains

　　Possible reasons: There is oil stains at the connections or seams, indicating that there is refrigerant leakage there, and the relevant parts should be re-strengthened or replaced. (A leak detector can be used to detect leaks)

　　5. Whether the HVAC valve or thermal control windshield is closed, and whether other windshields are adjusted normally

　　(Note: If the compression clutch cannot be engaged, the blower fan cannot operate, the condenser fan cannot operate, etc., you should first enter the relevant electrical system to check, such as relays, sensors, circuit open or short circuit, control unit, etc.).

　　6. Instrument detection method

　　This method uses a set of refrigerant pressure gauges to find the fault location. First, close the high-pressure end and low-pressure end switches of the pressure gauge. In the shutdown state, connect the refrigerant filling hose to the corresponding maintenance valve of the compressor, and use the refrigerant pressure in the refrigeration device to discharge the air in the hose. At this time, the high and low pressure end readings should be in a balanced state (about 6kg/cm2). Start the engine and maintain it at 150rpm. The blower speed is set to the highest gear, and the air conditioner is set to the maximum position, which is in the "recirculation" state. The normal reading is:

　　7. Low-voltage end High-voltage end

R-134a 1.5-2.5kg/cm2 14-16kg/cm2

R-12 1.5-2.0kg/cm2 13-15kg/cm2

　　1. The indicated values ​​of the pressure gauges on the high-pressure side and low-pressure side are lower than the standard values, and bubbles can be seen through the observation holes.

　　原因：制冷循环漏气;制冷剂没有定期补足。

　　处理：用测漏仪测漏，并进行修理，补足制冷剂。

　　2、低压侧压力表指示负压，高压侧指示比正常值低，储液罐/干燥器前后管路有温差，严重时，储液罐/干燥器后管路有霜。

　　原因：膨胀阀或低压管路阻塞，储液罐/干燥器或高压管路阻塞;膨胀阀压力泡漏气，针阀完全关闭。

　　关于解冻机启动不了的原因分析我们就简单的介绍到这里，内容仅供参考，解释权归赣州大昌冷气设备工程有限公司所有。如有疑问请与我们联系!

Related recommendations