What does the air conditioner show h5 mean? Introduction of air conditioning fault.

Air conditioning has become one of the essential products in every family's daily life, especially in the hot summer, we can live almost entirely on air conditioning products. However, due to various reasons, such as the most common use time is too long or the shortcomings of air-conditioning products themselves. , which may lead to some faults in the later actual adaptation process and affect our operation. So the information I want to introduce to you today is the information about common faults of air conditioners.

1. What does it mean that the air conditioner shows h5?

In the air conditioning heating mode, the indoor machine will stop blowing when defrosting. When the air conditioner runs for a period of time, the outdoor condenser will be covered with thick frost and snow. If the frost and snow can't melt in time, it will directly affect the heating effect of air conditioning. Therefore, when the air conditioner runs for more than 40 minutes and meets the defrosting conditions, the air conditioner will begin to defrost. When defrosting, the indoor unit usually stops blowing and displays HS. The defrosting time is 6 minutes to 10 minutes (the defrosting time of variable frequency and fixed frequency air conditioners is the same). After defrosting, it is normal to start heating and turn off the defrosting lamp.

2. H4 appears in Gree air conditioner. What do you mean?

H4？ Refers to system abnormality, usually the internal machine filter screen is dirty. Just clean the filter screen of the internal machine. It is also possible that the system is short of freon, the temperature of the internal machine pipe is broken, or the system is dirty and blocked.

Third, the air conditioning fault introduction

Wall-mounted, cabinet-type or window-type air conditioners, when the evaporator and condenser are dirty and blocked (such as catkins and dust), will obviously reduce the refrigeration effect, and even appear the phenomenon of no refrigeration. Some users often think that this phenomenon is lack of fluorine, so they will send it to the maintenance department for repair. In fact, when a layer of dirt is attached to the condenser, the condensation effect becomes worse, which will seriously affect the refrigeration. Once dirt is produced on the evaporator surface, the refrigeration capacity cannot be effectively exerted and the refrigeration equipment cannot work normally. Our repair department often encounters such repair cases. Of course, once the dirt is removed, the failure of refrigeration and air conditioning will be eliminated immediately.

Fourth, the reasons for the failure

1, the air conditioning signal (control) transformer is damaged, which will make the whole machine unable to work.

Chigo cabinet air conditioner adopts 220V power supply. After plugging in the power supply, the power supply indicator light does not light up and the whole machine does not respond. The measured 220V power supply is normal. Open the indoor and outdoor cabinets, measure that 220V has been input into the circuit control panel, and the safety tube is intact.

Further tests show that the secondary of the control transformer has no output voltage. Remove the transformer and measure the resistance of the primary coil. Secondary resistance is normal. Obviously, the primary coil of the transformer has been damaged. After replacing the new transformer, turn on the power supply, and the power supply indicator lights up, and the machine works normally.

2. In summer, the breakdown damage of rheostat on air conditioning circuit is mostly caused by lightning strike.

A Mitsubishi PSH-5 and 6G6 cabinet air conditioner did not respond when it was turned on the next day after a thunderstorm. 380V power supply is normal. When the machine shell was opened for inspection, it was found that the 5A fuse was black and the rheostat was broken. After replacing the above two pieces, start the machine for half an hour and observe that it works normally.

Obviously, this fault was caused by lightning. I would like to remind our customers that in the summer with more thunderstorms, it is best to unplug the power supply when the weather changes, so as to avoid unnecessary losses.

There are many faults in the air conditioner, and some will display fault codes on the display panel. For example, the common information listed above is the reason why the air conditioner displays h5 or H4 and the operation steps. In addition, for air-conditioning failures, we have further analyzed other contents for you, such as general introduction, failure cause analysis and so on. For consumers or professionals engaged in air conditioning maintenance, these are all places worth learning and paying attention to.

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