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空气源热泵蒸发器结霜8大故障及排除法
进入冬季，空气能热水机蒸发器结霜原本属于正常现象，但如果结霜后不能正常化霜，甚至结冰，就会严重影响加热效果。判断步骤及排除方法如下：
In winter, air heating evaporator frosting is a normal phenomenon, but if frosting can not normalize frost or even ice, it will seriously affect the heating effect. The steps of judgment and the method of elimination are as follows:
首先检查设置是否正确，化霜启动时间、启动温度、化霜时间、化霜结束温度等设置是否合理。一般情况下，化霜出厂设置启动温度是2～4℃，化霜时间为30～45分钟，化霜结束温度一般为10℃左右。先检查这些设置是否合理，然后再进行下一步的判断。
First check the setting is correct, frost start time, start temperature, frost time, frost end temperature and other settings are reasonable. In general, the starting temperature of the defrosting factory is 2~4 C, the frost time is 30~45 minutes, and the end temperature of the frosting is about 10 C. First check whether these settings are reasonable, and then proceed to the next step.
蒸发器结霜
Evaporator frosting
8种情况
8 cases
1
One
蒸发器底部结霜
Frost at the bottom of the evaporator
大多为积水盘排水不畅导致，用热水人工化霜后，清理污物，保持积水盘排水畅通即可。
Most of the water disks are not smooth drainage, with hot water artificial frost, cleaning dirt, keep the water tray drainage unimpeded.
需要注意的是，如果发现蒸发器结霜，不要用坚硬的东西去清除，容易造成铜管损伤甚至冷媒泄露，最好的方法是用热水冲淋。
It should be noted that if the evaporator frosting is found, do not use hard things to remove, it is easy to cause copper tube damage or even refrigerant leakage. The best way is to use hot water to shower.
2
Two
蒸发器两侧均匀结霜，且一直不化霜
The evaporator is frosting on both sides of the evaporator and keeps the frost all the time.
①查看化霜温度，或将主机化霜探头置于霜体中，3分钟以后，若化霜温度显示在5℃以上，基本可以判定是化霜探头故障，用热水冲淋，人工化霜后，更换化霜探头即可。
First, check the defrosting temperature or put the host frost detector in the frost. After 3 minutes, if the Frost temperature is above 5 degrees, it can be basically judged that the frost detector is malfunction, hot water is washed, and after the artificial frost is changed, the frost detector can be changed.
②如果压缩机工作正常，对四通阀进行换向操作，或直接对四通阀通电，若没有四通阀吸合的声音，也没有听到冷媒流动的声音，基本可以判定四通阀线圈坏掉;若有吸合的声音，但没有冷媒流动的声音，则是因为四通阀卡死打不开，无法换向，导致蒸发器结霜，这时候需更换四通阀。
If the compressor is working, reversing operation on the four valves, four valves or directly to electricity, if there is no four way valve is sound, did not hear the sound of the refrigerant flow, basic can determine four valve coil broken; if there is a pull in sound, but no refrigerant flow the sound, it is because the four valve stuck open, unable to change, resulting in evaporator frosting need to replace the valve at this time, four.
3
Three
化霜不彻底
Defrosting
结霜后能够化霜，但化霜不干净、不彻底，或一侧有霜，一侧无霜。这种情况一般是由于：
Frost can be frosted after frosting, but the frost is not clean, not thorough, or one side is frosted, and one side is not frosted. This is generally due to:
①化霜结束温度设置过低或化霜时间设置过短导致，适当调整化霜结束温度和化霜时间即可;
The temperature setting is too low or the time setting is too short, and the temperature of the frost and the time of the frost can be adjusted properly.
②化霜探头位置不合理，这时候将化霜探头放置在结霜最严重的地方即可。
The position of the defrosting probe is not reasonable, and then the frosting probe is placed in the most serious place.
4
Four
短时间频繁结霜
Short time frosting
①首先检查化霜温度是否正常，若化霜温度显示正常，在0℃以下，先检查主机周围通风是否良好，清理主机周围杂物和清洗蒸发器，并适当延长化霜时间和提高化霜结束温度。
First, check whether the defrosting temperature is normal. If the defrosting temperature is normal, below 0 C, check the ventilation around the main engine, clean up the sundries around the main engine and clean the evaporator, and extend the time of defrosting and the end temperature of defrosting.
②主机频繁结霜，且压力表压力较低，先用热水人工化霜，然后观察制热时的低压表，若压力低于正常值(可对照同类机型)，基本可以判定是冷媒不足，或冷媒泄漏。
(2) the host frosts frequently, and the pressure of the pressure gauge is low. First, use the hot water to make the artificial frost, then observe the low pressure watch when making heat. If the pressure is below the normal value (comparable to the same type), it can be basically judged that the refrigerant is insufficient or the refrigerant leaks.
③主机风扇电机损坏或风量不足，如叶片损坏，或者风扇电机功率偏小。
The engine fan motor damage or air volume is insufficient, such as the blade damage, or the power of the fan motor is small.
5
Five
蒸发器部分结霜
Evaporator part frosting
蒸发器一侧或两侧不均匀结霜或部分区域结霜，这种情况是因为冷媒分流不均匀导致，大多为某一路毛细管不畅通或冰堵所致，排除方法为将化霜探头移到先结霜且不易化霜的铜管上或更换毛细管，重新抽真空，加冷媒。
The frost or part of inhomogeneous frosting on one side or both sides of the evaporator, this is the case because of refrigerant distribution due to the uneven road, mostly for a capillary blocked or ice blockage caused by exclusion method for defrosting the probe moved to the first frost and not easy and is defrosted on the copper pipe or replace the capillary tube to vacuum, and refrigerant.
6
Six
化霜过程中出现高压保护
High pressure protection in the process of frosting
这是由于结束化霜温度设置过高，适当调整结束化霜温度即可，一般设置为10℃。
This is due to the end of the Frost temperature setting too high, the appropriate adjustment of the end of the Frost temperature can be set to 10 degrees.
7
Seven
化霜过程中出现低压保护
Low pressure protection in the process of frosting
这是由于节流膨胀阀反向时堵塞或开度过小引起的，这时候需要更换节流膨胀阀或调解节流膨胀阀的开度，具体的调解方法，一般厂家的说明书都有详细的说明，不同的机型调解的参数不太一样，这里没办法统一讲解。
This is due to the clogging caused by too small or open throttle expansion valve when the reverse, this time need to replace the throttle expansion valve or throttle expansion valve opening mediation, the mediation method of the manufacturer's instructions generally has a detailed description of the parameters of different models of mediation is not the same, there is no unified way to explain.
8
Eight
没有结霜也在化霜
Not frosting and frosting
这是因为启动化霜温度设置过高，或化霜探头坏了，导致机器产生误动作。这时候只需调整化霜启动温度或更换化霜探头。
This is because the starting frosting temperature is too high, or the frosting probe is broken, causing the machine to produce misoperation. At this time, just adjust the frost start temperature or change the frosting probe.
总结：空气源热泵蒸发器结霜的8大原因及对应解决办法
Summary: 8 Reasons and corresponding solutions for frost formation of air source heat pump evaporator
症状特征
Symptom characteristics
原因分析
Cause analysis
解决方法、步骤
Solutions and steps
蒸发器底部结霜
Frost at the bottom of the evaporator
积水盘排水不畅导致
Poor drainage of the water tray
热水冲淋
Hot water rinsing
蒸发器两侧均匀结霜，且一直不化霜
The evaporator is frosting on both sides of the evaporator and keeps the frost all the time.
化霜探头坏或四通阀坏
Frosting probe bad or four - way valve
将化霜探头置于霜体中，3分钟以后若化霜温度显示在5℃以上，基本可以判定是化霜探头故障，热水冲淋后，更换化霜探头即可
The frost detector is placed in the frost body. After 3 minutes, if the Frost temperature is above 5 degrees, it can be basically judged that the frost detector fault occurs. After the hot water is washed, the frost detector can be changed.
对四通阀进行换向操作，或直接对四通阀通电。若没有吸合的声音，也没有冷媒流动的声音，基本可以判定四通阀线圈坏掉；若有吸合的声音，但没有冷媒流动的声音，则是因为四通阀卡死打不开，无法换向，需更换四通阀
The four - way valve is switched on or directly to the four - pass valve. If there is no sound of suction and no sound of refrigerant flowing, it is possible to decide that the four way valve coil is broken. If there is the sound of suction, but there is no sound of refrigerant flow, it is because the four way valve can not be opened and cannot be changed, and the four way valve must be replaced.
能够化霜，但化不干净，或一侧有霜，一侧无霜
Can defrost, but not clean, or one side of frost, one side without frost
化霜结束温度设置过低或化霜时间设置过短
Frosting end temperature setting is too low or frosting time is too short
适当调整化霜结束温度和化霜时间即可
Adjust the end temperature of the frost and the time of the frost
化霜探头位置不合理
The position of the defrosting probe is unreasonable
将化霜探头放置在结霜最严重的地方即可
Put the frosting probe into the most frosting place
短时间频繁结霜
Short time frosting
温度设置不合理或通风不畅
The temperature setting is not reasonable or the ventilation is not smooth
先检查化霜温度是否正常，若化霜温度显示正常，再检查主机周围通风是否良好，清理主机周围杂物和清洗蒸发器，并适当延长化霜时间和提高化霜结束温度
First check if the defrosting temperature is normal. If the Frost temperature is normal, check the ventilation around the main engine, clean up the sundries around the main engine and clean the evaporator, and extend the time of defrosting and the end temperature of defrosting.
冷媒不足或泄露
Insufficient or leaked refrigerants
先用热水人工化霜，然后观察制热时的低压表，若压力低于正常值（可对照同类机型），基本可以判定是冷媒不足，或冷媒泄漏
First, use hot water to make artificial frost, then observe the low pressure watch when making heat. If the pressure is below the normal value (comparable to the same type), it can be basically judged that the refrigerant is insufficient or the refrigerant leak.
风量不足
Insufficient air volume
查看主机风扇
View the host fan
In winter, air heating evaporator frosting is a normal phenomenon, but if frosting can not normalize frost or even ice, it will seriously affect the heating effect. The steps of judgment and the method of elimination are as follows:
首先检查设置是否正确，化霜启动时间、启动温度、化霜时间、化霜结束温度等设置是否合理。一般情况下，化霜出厂设置启动温度是2～4℃，化霜时间为30～45分钟，化霜结束温度一般为10℃左右。先检查这些设置是否合理，然后再进行下一步的判断。
First check the setting is correct, frost start time, start temperature, frost time, frost end temperature and other settings are reasonable. In general, the starting temperature of the defrosting factory is 2~4 C, the frost time is 30~45 minutes, and the end temperature of the frosting is about 10 C. First check whether these settings are reasonable, and then proceed to the next step.
蒸发器结霜
Evaporator frosting
8种情况
8 cases
1
One
蒸发器底部结霜
Frost at the bottom of the evaporator
大多为积水盘排水不畅导致，用热水人工化霜后，清理污物，保持积水盘排水畅通即可。
Most of the water disks are not smooth drainage, with hot water artificial frost, cleaning dirt, keep the water tray drainage unimpeded.
需要注意的是，如果发现蒸发器结霜，不要用坚硬的东西去清除，容易造成铜管损伤甚至冷媒泄露，最好的方法是用热水冲淋。
It should be noted that if the evaporator frosting is found, do not use hard things to remove, it is easy to cause copper tube damage or even refrigerant leakage. The best way is to use hot water to shower.
2
Two
蒸发器两侧均匀结霜，且一直不化霜
The evaporator is frosting on both sides of the evaporator and keeps the frost all the time.
①查看化霜温度，或将主机化霜探头置于霜体中，3分钟以后，若化霜温度显示在5℃以上，基本可以判定是化霜探头故障，用热水冲淋，人工化霜后，更换化霜探头即可。
First, check the defrosting temperature or put the host frost detector in the frost. After 3 minutes, if the Frost temperature is above 5 degrees, it can be basically judged that the frost detector is malfunction, hot water is washed, and after the artificial frost is changed, the frost detector can be changed.
②如果压缩机工作正常，对四通阀进行换向操作，或直接对四通阀通电，若没有四通阀吸合的声音，也没有听到冷媒流动的声音，基本可以判定四通阀线圈坏掉;若有吸合的声音，但没有冷媒流动的声音，则是因为四通阀卡死打不开，无法换向，导致蒸发器结霜，这时候需更换四通阀。
If the compressor is working, reversing operation on the four valves, four valves or directly to electricity, if there is no four way valve is sound, did not hear the sound of the refrigerant flow, basic can determine four valve coil broken; if there is a pull in sound, but no refrigerant flow the sound, it is because the four valve stuck open, unable to change, resulting in evaporator frosting need to replace the valve at this time, four.
3
Three
化霜不彻底
Defrosting
结霜后能够化霜，但化霜不干净、不彻底，或一侧有霜，一侧无霜。这种情况一般是由于：
Frost can be frosted after frosting, but the frost is not clean, not thorough, or one side is frosted, and one side is not frosted. This is generally due to:
①化霜结束温度设置过低或化霜时间设置过短导致，适当调整化霜结束温度和化霜时间即可;
The temperature setting is too low or the time setting is too short, and the temperature of the frost and the time of the frost can be adjusted properly.
②化霜探头位置不合理，这时候将化霜探头放置在结霜最严重的地方即可。
The position of the defrosting probe is not reasonable, and then the frosting probe is placed in the most serious place.
4
Four
短时间频繁结霜
Short time frosting
①首先检查化霜温度是否正常，若化霜温度显示正常，在0℃以下，先检查主机周围通风是否良好，清理主机周围杂物和清洗蒸发器，并适当延长化霜时间和提高化霜结束温度。
First, check whether the defrosting temperature is normal. If the defrosting temperature is normal, below 0 C, check the ventilation around the main engine, clean up the sundries around the main engine and clean the evaporator, and extend the time of defrosting and the end temperature of defrosting.
②主机频繁结霜，且压力表压力较低，先用热水人工化霜，然后观察制热时的低压表，若压力低于正常值(可对照同类机型)，基本可以判定是冷媒不足，或冷媒泄漏。
(2) the host frosts frequently, and the pressure of the pressure gauge is low. First, use the hot water to make the artificial frost, then observe the low pressure watch when making heat. If the pressure is below the normal value (comparable to the same type), it can be basically judged that the refrigerant is insufficient or the refrigerant leaks.
③主机风扇电机损坏或风量不足，如叶片损坏，或者风扇电机功率偏小。
The engine fan motor damage or air volume is insufficient, such as the blade damage, or the power of the fan motor is small.
5
Five
蒸发器部分结霜
Evaporator part frosting
蒸发器一侧或两侧不均匀结霜或部分区域结霜，这种情况是因为冷媒分流不均匀导致，大多为某一路毛细管不畅通或冰堵所致，排除方法为将化霜探头移到先结霜且不易化霜的铜管上或更换毛细管，重新抽真空，加冷媒。
The frost or part of inhomogeneous frosting on one side or both sides of the evaporator, this is the case because of refrigerant distribution due to the uneven road, mostly for a capillary blocked or ice blockage caused by exclusion method for defrosting the probe moved to the first frost and not easy and is defrosted on the copper pipe or replace the capillary tube to vacuum, and refrigerant.
6
Six
化霜过程中出现高压保护
High pressure protection in the process of frosting
这是由于结束化霜温度设置过高，适当调整结束化霜温度即可，一般设置为10℃。
This is due to the end of the Frost temperature setting too high, the appropriate adjustment of the end of the Frost temperature can be set to 10 degrees.
7
Seven
化霜过程中出现低压保护
Low pressure protection in the process of frosting
这是由于节流膨胀阀反向时堵塞或开度过小引起的，这时候需要更换节流膨胀阀或调解节流膨胀阀的开度，具体的调解方法，一般厂家的说明书都有详细的说明，不同的机型调解的参数不太一样，这里没办法统一讲解。
This is due to the clogging caused by too small or open throttle expansion valve when the reverse, this time need to replace the throttle expansion valve or throttle expansion valve opening mediation, the mediation method of the manufacturer's instructions generally has a detailed description of the parameters of different models of mediation is not the same, there is no unified way to explain.
8
Eight
没有结霜也在化霜
Not frosting and frosting
这是因为启动化霜温度设置过高，或化霜探头坏了，导致机器产生误动作。这时候只需调整化霜启动温度或更换化霜探头。
This is because the starting frosting temperature is too high, or the frosting probe is broken, causing the machine to produce misoperation. At this time, just adjust the frost start temperature or change the frosting probe.
总结：空气源热泵蒸发器结霜的8大原因及对应解决办法
Summary: 8 Reasons and corresponding solutions for frost formation of air source heat pump evaporator
症状特征
Symptom characteristics
原因分析
Cause analysis
解决方法、步骤
Solutions and steps
蒸发器底部结霜
Frost at the bottom of the evaporator
积水盘排水不畅导致
Poor drainage of the water tray
热水冲淋
Hot water rinsing
蒸发器两侧均匀结霜，且一直不化霜
The evaporator is frosting on both sides of the evaporator and keeps the frost all the time.
化霜探头坏或四通阀坏
Frosting probe bad or four - way valve
将化霜探头置于霜体中，3分钟以后若化霜温度显示在5℃以上，基本可以判定是化霜探头故障，热水冲淋后，更换化霜探头即可
The frost detector is placed in the frost body. After 3 minutes, if the Frost temperature is above 5 degrees, it can be basically judged that the frost detector fault occurs. After the hot water is washed, the frost detector can be changed.
对四通阀进行换向操作，或直接对四通阀通电。若没有吸合的声音，也没有冷媒流动的声音，基本可以判定四通阀线圈坏掉；若有吸合的声音，但没有冷媒流动的声音，则是因为四通阀卡死打不开，无法换向，需更换四通阀
The four - way valve is switched on or directly to the four - pass valve. If there is no sound of suction and no sound of refrigerant flowing, it is possible to decide that the four way valve coil is broken. If there is the sound of suction, but there is no sound of refrigerant flow, it is because the four way valve can not be opened and cannot be changed, and the four way valve must be replaced.
能够化霜，但化不干净，或一侧有霜，一侧无霜
Can defrost, but not clean, or one side of frost, one side without frost
化霜结束温度设置过低或化霜时间设置过短
Frosting end temperature setting is too low or frosting time is too short
适当调整化霜结束温度和化霜时间即可
Adjust the end temperature of the frost and the time of the frost
化霜探头位置不合理
The position of the defrosting probe is unreasonable
将化霜探头放置在结霜最严重的地方即可
Put the frosting probe into the most frosting place
短时间频繁结霜
Short time frosting
温度设置不合理或通风不畅
The temperature setting is not reasonable or the ventilation is not smooth
先检查化霜温度是否正常，若化霜温度显示正常，再检查主机周围通风是否良好，清理主机周围杂物和清洗蒸发器，并适当延长化霜时间和提高化霜结束温度
First check if the defrosting temperature is normal. If the Frost temperature is normal, check the ventilation around the main engine, clean up the sundries around the main engine and clean the evaporator, and extend the time of defrosting and the end temperature of defrosting.
冷媒不足或泄露
Insufficient or leaked refrigerants
先用热水人工化霜，然后观察制热时的低压表，若压力低于正常值（可对照同类机型），基本可以判定是冷媒不足，或冷媒泄漏
First, use hot water to make artificial frost, then observe the low pressure watch when making heat. If the pressure is below the normal value (comparable to the same type), it can be basically judged that the refrigerant is insufficient or the refrigerant leak.
风量不足
Insufficient air volume
查看主机风扇
View the host fan
