UPS power supply common failures and troubleshooting methods
UPS power supply in use is not always very durable, as well as other equipment like some minor failures will occur, the following I have compiled a UPS power supply common failures and troubleshooting methods, I hope to help you!
The first, there is utility power when the UPS output is normal, and no utility power when the buzzer long, no output.
The second, the battery voltage is low, but the power on charging more than ten hours, the battery voltage is still not up.
The third, inverter power level.
Analyze the UPS power supply`s `common faults and troubleshooting methods
UPS power supply in use is not always durable, but also like other equipment will occur some minor failures, the following analysis of UPS power supply common faults.
The first, there is utility power when the UPS output is normal, and no utility power when the buzzer long, no output.
The second kind, the battery voltage is low, but boot charging more than ten hours, the battery voltage is still not up.
The third, the inverter power stage a pair of amplifier transistor damage, replace the same type of transistor, run for a period of time and burned out because of excessive current, and cause excessive current causes: overcurrent protection failure. When the inverter output overcurrent occurs, the overcurrent protection circuit does not work; pulse width modulation (PWM) component failure, the output of the two complementary waveforms are asymmetrical, a long on-time.
And another short on-time, so that the two arms work unbalanced, or even two arms at the same time on, resulting in damage to the two tubes; power tube parameters differ greatly, even if the input symmetrical waveform, the output will be asymmetrical, the waveform through the output transformer, resulting in bias, that is, the flux is not balanced, and accumulated resulting in the saturation of the transformer and the current surge, burned out of the power tubes, and a burned out, and the other one is burned out.
The fourth type of power supply is a power supply that is not a power supply.
The fourth, after the UPS is turned on, there is no display on the panel, the UPS does not work.
The fifth, in the case of access to the mains, every time you turn on the UPS, you will hear the sound of repeated actions of the relay, the UPS panel battery voltage is too low indicator light and buzzer long.
Sixth, in the utility power supply is normal when you turn on the UPS, the inverter indicator flashes, the buzzer sounds intermittent, the UPS can only work in the inverter state, can not be converted to the utility state.
The above is the daily use of UPS power supply failure, once the UPS power supply failure occurs, be sure to calmly find the problem, but also in the usual accumulation of more experience in problem solving.
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