Dajin is a professional multinational enterprise that integrates the research and development, production, sales, and service of air conditioning, refrigerant, and compressors.From family, office buildings, shops and other daily living spaces to large facilities such as the dome court, airports, and hospitals, as well as hospitals.Dajin Air Conditioning provides "comfort" suitable for each space, and continuously creates "new air -conditioning culture" with excellent technology and quality.Lets take a look at the relevant introduction of Dajin Air Conditioning.
Dajin Air Conditioning Repair
The following code is suitable for FTY223C, FTY353C, FTY453C, FTY603C and other models. The operation step of the automatic diagnosis fault function is: when the operating method is selected by the air conditioner, the time key is pressed for more than 3 seconds.Enter the state of fault diagnosis and test, and then press the abnormal signal detection key. If there is a fault, the fault code will appear on the temperature display of the liquid crystal board
A6 fan system failure, fan motor problems
C4 outdoor tube warm thermist resistance is faulty
C9 outdoor breeze thermistor is faulty
U4 indoor machine and outdoor control line contact is poor or wrong
U5 indoor machine is poor in contact with remote control
E5 overloadable compressor overload operation
E3 high pressure is too high, the pressure relay is disconnected and protected
H3 high -voltage controller has a failure itself
H9 outdoor temperature sensor has problems itself
J6 heat exchangers temperature sensor is faulty
The sensor in the P3 electrical box is faulty
How about the big gold air conditioner
Case: Dajin KFR-120LWD air conditioner, there is no reaction to connecting the power supply
Failure phenomenon: After the power is turned on, the whole machine does not start, the power indicator is not bright, and the machine has no reaction.
Failure analysis: There is no reaction of the whole machine, and the power indicator is not bright. This failure is mostly caused by abnormal power supply circuits. You should start with this test.
Fault maintenance
1. Judge the approximate part of the fault
(1) A intuitive inspection, found that the pressure -sensitive resistors and fuses on the line board have been damaged due to over pressure.
(2) Check the voltage of the power supply, and use the multimeter to measure the phase 220V and the three -phase 380V voltage.
(3) After changing the damaged pressure -sensitive resistor and fuse, connect the power test machine, and find that the fan motor of the indoor machine is basically not rotated, and at the same time, the sound of lalaness appears at the moment of rotation.
(4) Check the single -phase voltage again, and it was found that the voltage continued to swing between 220V and 100V.It is inferred that the failure may be on the power supply power supply of the user, and it is likely that there is a failure that the power supply occurs.
(5) The user uses a three -phase power supply to further check the users power distribution disk, and it is found that its zero line is disconnected.
2. Fault treatment
After re -connecting the zero line, the power supply test machine is connected. After the air conditioner starts, it runs normally and the fault is excluded.
Tip: Some faults of the air conditioner are caused by poor power cords at the user.This should be noticed during the maintenance. If there is no failure to check the air conditioner itself, you should consider whether the failure of the users power supply line.

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