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空调常见故障现象及维修方法

来源: 日期:2018-01-01 发布人:admin
一、济南空调维修可控硅坏、室内机噪音
One, Ji'nan air conditioning maintenance SCR, indoor noise
故障现象:关机后,室内风机慢慢转动,开机后发出剌耳噪声。
Failure phenomenon: after the shutdown, the indoor fan slowly rotates, when the machine opens, it sends out the noise of the ear.
原因分析:根据用户反映及现象分析,初步判断为室内电机供电故障,检查室内风机供电电压,关机状态下电机上有100v电压,关机后室内电机仍缓慢连续运行,室内电机发热使塑料的电机架遇热变形,塑封电机位置偏移,这样则导致贯流风叶要与底盘相碰,发出难听的噪音,而且有一股烧焦的味道。由此判定为风机控制可控硅损坏。
Cause analysis: according to the analysis of users and reflect the phenomenon, a preliminary judge for indoor motor power supply, check the indoor fan power supply voltage, 100V voltage shutdown state of motor, shut down after the indoor motor is still slow continuous operation, indoor heating of the motor to make the plastic deformation heat motor frame, plastic motor position offset, thus lead to cross fan blade and chassis to collide, a terrible noise, and there was a smell of burning. It is determined that the damage of the thyristor is controlled by the fan.

解决措施:换主控板。
The solution: change the main control board.
经验总结:分体挂机室内机风机转速是由可控硅来控制的,当电源电压较低或波动较大时,会造成可控硅单相击穿,停机时室内风机仍有电压,电机仍会慢转,由于可控硅为单相击穿,电机供电电源非正弦波形,电机运转不平稳,噪音较大。
Experience: split hanging indoor machine fan speed is by thyristor to control, when the supply voltage is low or fluctuations, will cause the thyristor single-phase breakdown, stopping the indoor fan motor will still have voltage, slow turn, because the silicon controlled single-phase breakdown, motor power supply of non sinusoidal waveform the motor, running smooth, noisy.
二、室内风机关机后不停及未开机风机就运行
Two. The air blower will run after the machine is shut down and the air blower is running
济南空调维修故障现象:关机后,室内风机不停、未开机风机就运行。
Ji'nan air conditioning maintenance failure phenomenon: after shutdown, the indoor fan does not stop, the air fan is running.
原因分析:根据用户反映故障现象,通电即发现室内风机运行,用遥控开机后关机,室内风机仍在运行,初步判断为室内电机供电故障,检查室内风机供电电压,通电状态或关机装态下电机上有158v电压输出,因此通电后室内电机就运行,由此判定为风机控制可控硅损坏。
Cause analysis: according to the user to reflect the fault phenomenon of electricity that is found in the indoor fan operation, remote boot and shutdown, the indoor fan is still running, a preliminary judge for indoor motor power supply, check the indoor fan power supply voltage, power or shutdown with 158v voltage output state of motor, so the electricity after indoor motor operation, thus determining the fan control thyristor damage.
解决措施:更换同型号控制器后试机正常。
The solution: the replacement of the same type of controller is normal.
经验总结:分体挂机室内机风机转速是由可控硅来控制的,当电源电压较低或波动较大时,会造成可控硅单相击穿,停机或关机时室内风机仍有电压,室内风机不能关闭。
Experience summary: the fan speed of split up indoor unit is controlled by thyristor. When the supply voltage is low or fluctuating, it will cause single-phase breakdown of SCR, and there is still a voltage inside the fan when it is shut down or shut down, and the indoor blower can't be closed.
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