Overcurrent fault？+
Type: acceleration, deceleration, constant speed overcurrent
Reason: Short acceleration and deceleration time, sudden load changes, uneven load distribution, output short circuit, etc
Processing method:
Extend acceleration and deceleration time, reduce sudden changes in load, add energy consumption braking components, design load distribution, and inspect the line;
If there is an occasional malfunction, attention should be paid to daily maintenance and dust cleaning of the frequency converter, as well as checking the main drive for signs of aging.
If the load is disconnected and the frequency converter still experiences an overcurrent fault, it indicates that the inverter circuit is damaged. Check the inverter module.
Overvoltage fault？+
Type: Acceleration, deceleration, constant speed overvoltage
Reason: The acceleration and deceleration time is too short, the input voltage is too high, there is external force driving the motor during the acceleration and deceleration process, and there is no added braking unit and braking resistor
Processing method:
Extend the acceleration and deceleration time, adjust the voltage to the normal range, cancel additional power, or install brake units and braking resistors;
If there is an occasional malfunction, attention should be paid to daily maintenance and dust cleaning of the frequency converter, as well as checking the main drive for signs of aging.
Undervoltage fault？+
Input phase loss: (a fault caused by a phase loss in the power supply wiring that causes the inverter phase loss protection action)
① Check if the input (R, S, T) wiring has contact fractures and if the wiring screws are tightened
② Check if there are any abnormalities in the three-phase voltage at the input end, aging of the cables, and losses
③ Check if the connection of the cable is loose, which may cause misoperation
④ Misoperation of frequency converter
Output phase loss: (a fault caused by a phase loss in the motor wiring, resulting in a phase loss in the frequency converter and causing a phase loss protection action in the frequency converter)
① Check if the (U, V, W) connecting wires of the motor are loose and if the motor wires are damaged
② Check whether the output three-phase is normal without a motor, and check the motor winding normally
③ Frequency converter malfunctions, clean dust, and replace components.
Phase failure？+
Input phase loss: (a fault caused by a phase loss in the power supply wiring that causes the inverter phase loss protection action)
① Check if the input (R, S, T) wiring has contact fractures and if the wiring screws are tightened
② Check if there are any abnormalities in the three-phase voltage at the input end, aging of the cables, and losses
③ Check if the connection of the cable is loose, which may cause misoperation
④ Misoperation of frequency converter
Output phase loss: (a fault caused by a phase loss in the motor wiring, resulting in a phase loss in the frequency converter and causing a phase loss protection action in the frequency converter)
① Check if the (U, V, W) connecting wires of the motor are loose and if the motor wires are damaged
② Check whether the output three-phase is normal without a motor, and check the motor winding normally
③ Frequency converter malfunctions, clean dust, and replace components.
Overheating fault？+
Overheating fault: The fault of the frequency converter causing overheating protection action due to internal temperature exceeding the specified value
Generally, overheating faults can be divided into: overheating inside the frequency converter and overheating of the radiator
1. Overheating inside the frequency converter: The ambient temperature is high, reducing the temperature of the equipment's operating environment; Fan blocked, replace the fan; Setting the carrier frequency too high reduces the carrier frequency; Detect temperature component failure, contact the manufacturer to replace the component
2. Radiator overheating: If the cooling channel is blocked, clean the cooling air duct; Overload work, reduce load or reduce frequency.
Sensor detection failure？+
Fault reason:
1) Pressure sensor not connected
2) Pressure sensor wiring error;
3) Pressure sensor open circuit
4) The pressure sensor is damaged
5) The open circuit detection value is set too high
Solution:
Check the connection line between the sensor and the controller; Check whether the pressure sensor is normal;
Check if the open circuit detection value of the sensor is set too high.
Low water pressure alarm？+
1. Precautions for use:
The newly installed water pump has not discharged air and cannot supply water under normal pressure;
Is a filtering device installed at the inlet and outlet of the water pump, resulting in abnormal water output;
The water consumption exceeds the rated flow rate of the water pump
2. Check accessories:
Is there any error in the range setting of the sensor;
The pressure gauge has pressure, but there is no pressure feedback; The pressure sensor has malfunctioned;
The water pump impeller is worn
3. Regarding the handling method for slow pressure increase in newly used pipelines:
Turn down the water outlet valve, let the water pressure rise, and then slowly open the water outlet valve;
Extend the low water pressure detection time,
Reduce the low water pressure alarm value setting.
Abnormal sleep function?+
1. Unable to enter sleep normally:
1) Check if there is air leakage or insufficient air pressure inside the airbag of the pressure tank (usually 1/3 of the operating pressure);
(Note: Pressure stabilizing tank - composed of four parts: tank body, airbag, water inlet, and exhaust port. Used in closed water circulation systems, it plays a role in balancing water volume and pressure, avoiding frequent opening of safety valves and frequent replenishment of automatic water valves. When water under external pressure enters the airbag of the expansion tank, the nitrogen gas sealed in the tank is compressed. According to Boyle's gas law, the volume of gas decreases after compression, and the pressure increases until expansion Stop water inlet when the gas pressure in the tank is consistent with the water pressure;
2) Reduce the sensitivity of the check valve and adjust the sleep deviation value;
3) Reduce the lower limit frequency and shorten the deceleration time
2. Frequent sleep activation
1) Adjust the deviation value of sleep activation;
2) Check for water leakage in the pipeline;
3) Adjusting PID parameters