Omron household oxygen concentrator failure and maintenance method

1/4 of the machine is not running, but the power indicator is on:

Reason: The compressor is overheated, so that the compressor turns on the overheating protection and stops automatically.

Exclusion method: If the machine runs for a long time without stopping, and suddenly stops one day, and the machine can run again after the machine is turned off and cooled, this is the compressor working time is too long, causing the compressor to overheat, so that the compressor opens the overheating protection and automatically stops. Therefore, the machine should be avoided as much as possible to work continuously for a long time without stopping the machine, and it is best to run for 12 hours and stop for 30 minutes.

2/4 of the machine is running, but there is no oxygen output, the flowmeter floats at the bottom or a certain position, and the knob of the adjustment flowmeter does not move:

Cause:

1. The humidified bottle core is blocked by scale and cannot be ventilated;

2. The flowmeter knob is turned off or damaged.

Exclusion method: 1. Turn on the power switch of the oxygen machine to make the machine run. Unscrew the humidification bottle to see if the float of the flowmeter is adjustable, if it is adjustable, the humidification bottle core is blocked by scale, and the humidification bottle core hole is opened with a needle. Instead, check the flow meter swirl

Possible faults:

1. There is grounding or short circuit in the output circuit of the inverter

2. The control mode is vector and there is no parameter discrimination

3. The acceleration time is too short

4. Manual torque lifting or V/F curve is not suitable

5. The voltage is low

6. Start the rotating motor

7. Sudden load increase during acceleration

8. The inverter selection is small

Failure Analysis:

1. The damage of the rectifier module is usually caused by the grid voltage or internal short circuit. In the case of excluding internal short circuits, the rectifier bridge is replaced. When dealing with faults on site, it is necessary to focus on checking the user's power grid, such as grid voltage, whether there is equipment that pollutes the power grid such as welding machines, etc.

2. The damage of the inverter module is usually caused by motor or cable damage and drive circuit failure. After repairing the driving circuit, replace the module when the driving waveform is in good condition. After replacing the driver board in field service, care must be taken to check the motor and connecting cables. The inverter can only be operated after it is determined that there are no faults.

3. The power-on no display is usually caused by the damage of the switching power supply or the damage of the soft charging circuit, which causes the DC circuit to have no DC current, such as the damage of the starting resistor and the damage of the operation panel.

4. The display of overvoltage or undervoltage is usually caused by the lack of phase of the input, the aging of the circuit and the moisture of the circuit board. The solution is to find out the voltage detection circuit and detection point, and replace the damaged device.

5. The display of overcurrent or short circuit to ground is usually due to damage to the current detection circuit. Such as Hall elements, op amp circuits, etc.

6. The overcurrent of the power supply and the driver board is usually caused by the damage of the drive circuit or inverter module.

7. The no-load output voltage is normal, and the overload or overcurrent is usually caused by improper parameter setting or aging of the driving circuit and damage to the module

Omron household oxygen concentrator failure and maintenance method

Omron household oxygen concentrator failure and maintenance method

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