Single phase automatic voltage stabilizer – Cabinet type – 140v-265v

Fault phenomenon

Cause of issue

Maintenance method

When power on, the voltmeter does not indicate

1. The plug is not inserted firmly, there is no output voltage

2. The fuse is blown

1. Check the power socket and make sure the plug is firmly inserted

2. Replace with a spare fuse that meets the regulations

The voltage regulator is not stable

1. Servo failure

2. The input voltage exceeds the voltage regulation range

1. If the motor is rotating, or the motor has voltage, but cannot drive the boom, the motor should be replaced

2. If the motor has no voltage, check the micro switch and the circuit board to adjust and protect the fine-tuning resistor on the circuit board. If the fault has not been eliminated, repair or replace the circuit board

The regulator can regulate, but the regulation value is offset

1. Voltage trimmer potentiometer displacement

2. The reading of the voltmeter is not accurate

1. Adjust the voltage trimmer potentiometer

2. Replace or repair the voltmeter

The voltage stabilizer coil is burnt out

1. The load is too large, exceeding the load capacity of the voltage regulator

1. When changing the coil, pay special attention to the installation position and output voltage of the coil.

The voltage stabilizer sometimes makes mechanical turning noise and motor turning noise

1. Frequent voltage adjustment due to input voltage fluctuations

1. As long as the output voltage is stable at the rated voltage and the working chamber of the voltage stabilizer is normal

The circuit breaker switch trips after connecting the voltage stabilizer

1. The voltage regulator input line is connected incorrectly

2. The rated current of the high breaking circuit breaker switch is incorrect

1. Correctly connect the voltage regulator input line

2. Select a suitable high breaking circuit breaker

The output voltmeter keeps swinging back and forth and sparks are generated at the carbon brushes

1. The contact pressure between the carbon brush and the coil plane is too small

2. The carbon brush is severely worn

1. Use a fine file or sandpaper to clean the coil and carbon brush, then adjust the pressure of the carbon brush

2. Replace with new carbon brushes

Three-phase does not start, no output voltage

1. Input phase loss

2. The control circuit board does not work

3. The control circuit board is in the protection state

1. Correctly input phase A, B and C, it should be three-phase four-wire system or five-wire system

2. The control circuit board is disconnected or damaged. Repair or replace

3. The input phase line voltage exceeds the voltage regulation range, and the input voltage can be adjusted