UPS Repairs

Uninterruptible Power Supply POWERCOM BNT-600A (2)

UPS entered the repair of the claimed defect "becomes unstable, sometimes disconnected, squeaks, flashing indicator light." The audit found that the source used in the battery YUASA NPW36-12 - normal, and further proceedings revealed that the cause of the malfunction of the UPS is defective trimmer VR1 503 (50 ohms), located on board BNT-V3.3 110-0BNT -613-00N, to be precise, then this resistor is broken contact with the conclusions of the resistive element.

This resistor is in circuit voltage measurement on the battery (done on one of the op-amp chip U3 AZ324P-E1 and resistors R58, R61).

After replacement of the trimmer (trimmer was used 3329H-503 VATRONICS) and its range (when the batteries are disconnected set charge voltage in the range of 13.5 ... 13.8V), performance uninterruptible power supply has been restored.

The UPS power transformer applied RT-7000BN.

With other materials, repair UPS this model can be found here: 1 .

PS A small diagram above node voltage, resistors R58, R61 - precision:

Uninterruptible Power Supply POWERCOM BNT-600A

UPS is based on the board BNT-V3.0, he enrolled in the repair of the claimed defect "after some time of operation a continuous beep is heard." The audit determined that the voltage at the terminals of the battery when the UPS after some time reaches more than 15V, with an acceptable - 13.5 ... 13.8V. The reason for this turned out to be a faulty integrated stabilizer Q15 UTC LM317AL,

which turned out to be "short circuit" between the terminal Vin and Vout. Stabilizer was replaced by an analogue LM317T (company STMicroelectronics, Datasheet ), other than that, after replacement, you must verify that the level of the charging voltage at the battery terminals is within the 13.5 ... 13.8V (set trimmer VR1, when the batteries are disconnected).

With other materials, repair UPS this model can be found here: 1 .

The site "Elektron55.ru" working forum.

Uninterruptible Power Supply POWERCOM BNT-500AP

UPS entered the repair claimed to be defective "is not included." The audit revealed that the board BNT2-V1.0, have failed a field effect transistor Q6 IRFZ44N ( Datasheet ), working in the converter (inverter), as well as two fuse FUSE1 25A / 32V. Were replaced by four transistor inverter Q4, Q5, Q6, Q7 on IRFZ46N, and the place FUSE1 were installed fuses ZH270-025. The UPS was switched on for a few seconds and then stops immediately, the reason turned out to be a faulty power transformer CHUAN SHUN ELECTRIC INDUSTRIAL CO., LTD RT-6000B, after replacing that, of the UPS has been restored.

The site "Elektron55.ru" working forum.

Uninterruptible Power Supply POWERCOM BNT-500A (2)

In UPS used charge BNT-V3.3 / 110-0BNT-612-00N and power transformer KE HUANG 866-RT6K-BN0-00R RT-6000BN, he enrolled in the repair claimed to be defective "is not working, it beeps after a while after turning . " The audit found that the problem is with the defective trimmer VR1 503 (50 ohm). This resistor is in the scheme of measurement of the battery voltage, which is formed on one of the four operational amplifiers circuit U3 AZ324P-E1 and resistors R58, R61. After replacing the trimmer and adjust (if the batteries are disconnected set charge voltage in the range of 13.5 ... 13.8V), performance uninterruptible power supply has been restored.

The UPS is used battery YUASA NPW36-12 12V, 36W / Cell, 10 min.

With other materials, repair UPS this model can be found here: 1

Uninterruptible Power Supply POWERCOM BNT-500A

UPS entered the repair claimed to be defective "is not included." During the inspection on board BNT-V3.3 (110-0BNT-612-00N), identified the following faulty elements: FETs converter Q6 and Q3 UTC 50N06L and fuses FUSE1, FUSE2 25A / 32VDC, standing in the food chain battery - B. After replacing the faulty transistors (transistors were replaced all converter - Q3, Q4, Q5, Q6 for similar RFP50N06) and fuse (were used ZH270-025), availability of the UPS has been restored.

With other materials, repair UPS this model can be found here: 1 .

Uninterruptible Power Supply POWERCOM BNT-400A

UPS entered the repair claimed to be defective "sometimes may be turned off." During the inspection on board BNT-V3.0 110-0BNT-611-00N, found a violation of the soldering terminals of the diode D4 1N4007. After welds output (also recommended propayat "power" land cost) of the UPS has been restored.

The UPS is used rechargeable battery ALARM POWER AP4.5-12.

Uninterruptible Power Supply POWERCOM BNT-1200AP

UPS entered the repair of the claimed defect "does not work." When the source (with a connected network ~ 220V) heard the constant "clicks" - switch or try to switch the relay. During the inspection on board BNT-801 V1.1 112-B801-800-00N, were identified out of service ("burned-out") resistor - fuse F1 0.1 / 1W, he stands in the circuit of the transformer 30V, to be connected to the connector CN1 on the board (the "talking" bridge rectifier diodes D1 - D4). After replacing the F1, of the UPS has been restored.

Uninterruptible Power Supply POWERCOM BNT-1000AP

UPS entered the repair of the claimed defect "does not work", when it is connected to the mains ~ 220V, with normal voltage, the UPS emits sound signals the absence of the network, and therefore runs on batteries, with a protective fuse holder (the holder is combined with the network connector on the back panel) - defective. During the external examination and verification on board BNT-801 V1.1 112-B801-800-00N, was identified faulty choke L1 220uH (if it is to consider carefully in good light, it will be seen traces of "burnout"). After replacing the reactor L1 on non-defective, performance uninterruptible power supply has been restored.

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