Mitsubishi inverter fault handling in the domestic market, Mitsubishi because of its stable quality, strong brand influence, has a very broad market, and has in-depth application in various fields. Jinan Mitsubishi Service Center Mitsubishi Inverter Troubleshooting The Mitsubishi Inverter is currently the most used in the market is the A500 series, and E500 series, A500 series is a universal inverter, suitable for high starting torque and high dynamic response applications. The E500 series is suitable for simple functional requirements, and is used in occasions with lower dynamic performance requirements, and the price is more advantageous. The following author briefly introduced some new faults and corresponding processing methods for the two most widely used models of Mitsubishi inverters on the market: Jinan Yiling Electric Engineering Co., Ltd. 2.1 OC1, OC3 faults In the past, I introduced Mitsubishi inverters OC (overcurrent fault) is often caused by the following reasons (in the case of A500 series inverters).
(1) caused by improper parameter settings, such as time set too short;
(2) Caused by external factors, such as motor winding short-circuit, including (short-circuit between phases, short-circuit to ground, etc.);
(3) Inverter hardware failure, such as Hall sensor damage, IGBT module damage.
Any one of the above detection points may alarm and may not operate normally. In the case of the detection method that we introduced before, we must pay special attention to whether or not the problem is normal. The detection direction mainly includes several components of the Mitsubishi drive circuit just introduced.
2.2 UVT fault UVT is undervoltage fault, I believe many customers will encounter such problems in use, our common undervoltage detection point is the DC bus side voltage, after a large value of the resistance voltage divider sampling a low voltage Value, output normal voltage signal after comparison with standard voltage value, overvoltage signal or undervoltage signal.
2.3 E6, E7 fault E6, E7 fault is not unfamiliar to the majority of users, this is a more common Mitsubishi inverter typical failure, of course, is also a variety of reasons for damage.
Integrated circuit 1302H02 is damaged. This is an integrated circuit that integrates the drive waveform conversion and multiplex detection signals in one IC. There are multiple signals associated with the CPU board. In many cases, problems with any signal on the IC can cause E6. , E7 alarm;
2.4 Switching power supply damage Switching power supply damage is also a common fault of A500 series inverters. It excludes some factors such as pulse transformer damage, switch FET damage, start-up resistor damage, and rectifier diode damage that we often mentioned before.
2.5 Damage to the Power Module The power module is damaged mainly in the E500 series inverter. For a low-power inverter, since it is an intelligent module that integrates the power device and the detection circuit, it can only be replaced when the module is damaged, but the maintenance cost is high and no maintenance value is available. For the 5.5KW and 7.5KW E500 series inverters, the 7MBR series PIM power modules are used. The replacement cost is relatively low, and some damage can be done to the inverters. Mitsubishi Service Center In the history of nearly 85 years, Mitsubishi Electric has always been committed to the research and development activities of cutting-edge technology and expertise, and on this basis has been engaged in the development and manufacturing of high-performance products and equipment systems.
The global network established by Mitsubishi Electric Corporation for a long time has brought together companies, research institutes, and manufacturing companies. The technical information and materials provided by various business units have played an important role in creating first-class products in various departments. Mitsubishi Electric will continue to expand its position in the field of industrial and heavy equipment, satellites, defense systems, elevators and escalators, automotive electronics, air conditioning, and ventilation equipment. , display device technology and cutting-edge semiconductors and other world market share. In addition, Mitsubishi will also strive to expand new business areas, particularly in the areas of environmental protection and purification of water quality.
Mitsubishi Electric's business in China has grown and developed step by step with the development of China. Starting from the power generation equipment of Baoshan Iron and Steel Plant in 1978, it provided various products and equipment for industrial and household electromechanical equipment, power equipment, elevators, and air conditioners to Chinese customers. At the same time, it also actively engages in various technical exchanges and cooperation activities with many Chinese companies. Jinan Mitsubishi Service Center established its first joint venture company in Shanghai in 1987 - "Shanghai Mitsubishi Elevator Co., Ltd." The company introduced Mitsubishi Electric's world-leading computer-controlled AC variable-frequency variable-voltage elevator technology, and soon realized domestic production. Production. At present, the company has developed into a fine enterprise in China's elevator industry.
As of July 2007, Mitsubishi Electric has reached 28 joint ventures and wholly-owned enterprises in China. They are in the field of electronic components such as automotive parts and thermal print heads, as well as electrical and mechanical equipment such as power transmission and transformation equipment, industrial automation equipment, and household appliances. In a wide range of areas, we have carried out various businesses and actively carried out technology transfer.
Mitsubishi Electric (China) Co., Ltd. was established in October 1997 as an investment company. In the future, we will further carry out our investment activities in China. As a comprehensive electronic and electromechanical company, Mitsubishi Electric's window in China will continue to The activities of joint research and development, talent cultivation, and cultural exchanges with various scientific research institutions in China are conducted to make contributions to China-Japan friendship and China's economic development.
Mitsubishi inverter maintenance method In order to meet the needs of the market, Mitsubishi inverter has also developed the option card used in many occasions, mainly including the PG feedback card for precise speed, positioning control card for precise positioning, and pressure control. PI control card and relay and transistor output cards for extended output points. The continuous enhancement of the function of the frequency converter and the development of the option card make Mitsubishi inverter better meet the needs of different users, and it has also become the driving force for Mitsubishi inverters to grow rapidly.
2 Handling of common faults We will discuss some of the common faults of Mitsubishi inverters and the users here.
2.1 Faults of Early Products As Mitsubishi inverters enter the Chinese market earlier, some older products are still in use.
Let us first analyze the failure of these products. The products we encountered in the early days mainly included Z series and A200 series inverters. Low-power Z024 series inverter Our common fault phenomena are OC, ERR, and no display.
The causes of OC are mainly the following two possibilities.
(1) The aging of the drive circuit will inevitably lead to the aging of the components due to the use of a longer period of time. This will cause the distortion of the drive waveform, and the output voltage will be unstable. Therefore, an OC alarm will occur on a regular operation.
(2) Damage to the IPM module can also cause OC alarm. The power module used in the Z024 series of machines not only includes overcurrent and undervoltage detection circuits, but also includes an amplifier drive circuit, so no matter whether the detection circuit is damaged or not, the power circuit damage,
And damage to high-power transistors can cause OC alarms.
(3) The cause of no display failure is mostly caused by damage to the thick film of the switching power supply.
(4)
An ERR fault is an undervoltage fault, which is usually caused by a problem in the voltage detection loop resistance or wiring, rather than an actual undervoltage in the actual input voltage. Most of the A200 series OC faults are caused by the damage of the drive circuit. Its drive circuit uses a ceramic packaged thick film circuit, which brings certain difficulties for maintenance. The thick film circuit is mainly based on a drive light. Coupled with the design of the circuit.
(5)
In addition, we will encounter some LV faults. The occurrence of undervoltage faults is also mostly due to a fault in the bus detection circuit. Mitsubishi inverters have also designed a thick-film circuit for detecting voltage and current. The damage of the pulse transformer of the switching power supply is also a common fault of the A200 series inverter. Due to the short circuit of the output load of the switching power supply, or the sudden change of the bus voltage, the initial and secondary windings of the pulse transformer are damaged. Jinan Mitsubishi Service Center 2.2 A500 and E500 Series Common Faults The A500 series, E500 series, F500 series and S120 series are currently being promoted in the market. In the following, we will analyze the common faults of the A500 and E500 series and everyone.
(1)
For the A500 series we sometimes encounter UV (undervoltage) faults, we can check the rectifier circuit. The rectifier bridge of the A500 series 7.5kW inverter has a built-in thyristor. When the inverter is in normal operation, it is used to cut off the charging resistor. The damage of the built-in thyristor will lead to the occurrence of undervoltage fault. Switching power supply damage is also a common fault of A500 series inverters, and the common damage device is a waveform generator chip. This chip damage is usually caused by a sudden change in operating voltage. In addition, we still often encounter damage to the CPU board during normal maintenance. Common fault alarms are E6, E7, and damaged devices are mainly concentrated on the CPU board.
(2)
For the E500 series inverters, the common faults we encounter are Fn faults, which are mainly caused by the damage of the fan. However, the inverter does not block the output when there is an alarm.
3 Concluding remarks It should be said that Mitsubishi inverter faults in use are diversified, and it is hoped that more people engaged in the frequency conversion and speed regulation industry will join this rank in order to better solve some problems for the majority of users. Jinan Mitsubishi Service Center
[Edit this paragraph]
Mitsubishi inverter FR-A740 Series Introduction ■Power Range: 37～160kW
â– High-precision torque/speed/position control in closed loop â– Sensorless vector control for torque/speed control â– Built-in PLC function (special models)
â– Long-life components, built-in EMC filter â– Powerful network communication function, support DeviceNet, Profibus-DP, Modbus and other protocols
[Edit this paragraph]
Mitsubishi Inverter FR-F740 Series â—† Power Range: 37~220KW
â—† Simple magnetic flux vector control method achieves 120% output torque at 3Hz
â—† Adopt best excitation control mode to achieve higher energy-saving operation â—† Built-in PID, inverter/power frequency switching and multi-pump circulation operation function â—† Built-in independent RS485 communication port â—† Use long-life components â—† Built-in noise filter ( 75K or more)
â—† With energy-saving monitoring function, energy-saving effect at a glance
[Edit this paragraph]
Mitsubishi Inverter FR-E540 Series â—† Power Range: 0.4~7.5KW (Three-phase 380V FR-E540 Series)
â—† Flux vector control is used to realize 150% torque output in 1Hz operation â—† PID, multi-speed selection in 15 stages, etc. â—† Built-in independent RS485 communication port â—† Flexible PWM to achieve lower noise operation â—† Select FR-PA02-02 simple type Panel or FR-PU04-CH LCD Display Panel Mitsubishi Inverter, PLC, AC Servo, Tension Controller, Jinan Warranty Service Center
Contact number: (0)18954186760
(1) caused by improper parameter settings, such as time set too short;
(2) Caused by external factors, such as motor winding short-circuit, including (short-circuit between phases, short-circuit to ground, etc.);
(3) Inverter hardware failure, such as Hall sensor damage, IGBT module damage.
Any one of the above detection points may alarm and may not operate normally. In the case of the detection method that we introduced before, we must pay special attention to whether or not the problem is normal. The detection direction mainly includes several components of the Mitsubishi drive circuit just introduced.
2.2 UVT fault UVT is undervoltage fault, I believe many customers will encounter such problems in use, our common undervoltage detection point is the DC bus side voltage, after a large value of the resistance voltage divider sampling a low voltage Value, output normal voltage signal after comparison with standard voltage value, overvoltage signal or undervoltage signal.
2.3 E6, E7 fault E6, E7 fault is not unfamiliar to the majority of users, this is a more common Mitsubishi inverter typical failure, of course, is also a variety of reasons for damage.
Integrated circuit 1302H02 is damaged. This is an integrated circuit that integrates the drive waveform conversion and multiplex detection signals in one IC. There are multiple signals associated with the CPU board. In many cases, problems with any signal on the IC can cause E6. , E7 alarm;
2.4 Switching power supply damage Switching power supply damage is also a common fault of A500 series inverters. It excludes some factors such as pulse transformer damage, switch FET damage, start-up resistor damage, and rectifier diode damage that we often mentioned before.
2.5 Damage to the Power Module The power module is damaged mainly in the E500 series inverter. For a low-power inverter, since it is an intelligent module that integrates the power device and the detection circuit, it can only be replaced when the module is damaged, but the maintenance cost is high and no maintenance value is available. For the 5.5KW and 7.5KW E500 series inverters, the 7MBR series PIM power modules are used. The replacement cost is relatively low, and some damage can be done to the inverters. Mitsubishi Service Center In the history of nearly 85 years, Mitsubishi Electric has always been committed to the research and development activities of cutting-edge technology and expertise, and on this basis has been engaged in the development and manufacturing of high-performance products and equipment systems.
The global network established by Mitsubishi Electric Corporation for a long time has brought together companies, research institutes, and manufacturing companies. The technical information and materials provided by various business units have played an important role in creating first-class products in various departments. Mitsubishi Electric will continue to expand its position in the field of industrial and heavy equipment, satellites, defense systems, elevators and escalators, automotive electronics, air conditioning, and ventilation equipment. , display device technology and cutting-edge semiconductors and other world market share. In addition, Mitsubishi will also strive to expand new business areas, particularly in the areas of environmental protection and purification of water quality.
Mitsubishi Electric's business in China has grown and developed step by step with the development of China. Starting from the power generation equipment of Baoshan Iron and Steel Plant in 1978, it provided various products and equipment for industrial and household electromechanical equipment, power equipment, elevators, and air conditioners to Chinese customers. At the same time, it also actively engages in various technical exchanges and cooperation activities with many Chinese companies. Jinan Mitsubishi Service Center established its first joint venture company in Shanghai in 1987 - "Shanghai Mitsubishi Elevator Co., Ltd." The company introduced Mitsubishi Electric's world-leading computer-controlled AC variable-frequency variable-voltage elevator technology, and soon realized domestic production. Production. At present, the company has developed into a fine enterprise in China's elevator industry.
As of July 2007, Mitsubishi Electric has reached 28 joint ventures and wholly-owned enterprises in China. They are in the field of electronic components such as automotive parts and thermal print heads, as well as electrical and mechanical equipment such as power transmission and transformation equipment, industrial automation equipment, and household appliances. In a wide range of areas, we have carried out various businesses and actively carried out technology transfer.
Mitsubishi Electric (China) Co., Ltd. was established in October 1997 as an investment company. In the future, we will further carry out our investment activities in China. As a comprehensive electronic and electromechanical company, Mitsubishi Electric's window in China will continue to The activities of joint research and development, talent cultivation, and cultural exchanges with various scientific research institutions in China are conducted to make contributions to China-Japan friendship and China's economic development.
Mitsubishi inverter maintenance method In order to meet the needs of the market, Mitsubishi inverter has also developed the option card used in many occasions, mainly including the PG feedback card for precise speed, positioning control card for precise positioning, and pressure control. PI control card and relay and transistor output cards for extended output points. The continuous enhancement of the function of the frequency converter and the development of the option card make Mitsubishi inverter better meet the needs of different users, and it has also become the driving force for Mitsubishi inverters to grow rapidly.
2 Handling of common faults We will discuss some of the common faults of Mitsubishi inverters and the users here.
2.1 Faults of Early Products As Mitsubishi inverters enter the Chinese market earlier, some older products are still in use.
Let us first analyze the failure of these products. The products we encountered in the early days mainly included Z series and A200 series inverters. Low-power Z024 series inverter Our common fault phenomena are OC, ERR, and no display.
The causes of OC are mainly the following two possibilities.
(1) The aging of the drive circuit will inevitably lead to the aging of the components due to the use of a longer period of time. This will cause the distortion of the drive waveform, and the output voltage will be unstable. Therefore, an OC alarm will occur on a regular operation.
(2) Damage to the IPM module can also cause OC alarm. The power module used in the Z024 series of machines not only includes overcurrent and undervoltage detection circuits, but also includes an amplifier drive circuit, so no matter whether the detection circuit is damaged or not, the power circuit damage,
And damage to high-power transistors can cause OC alarms.
(3) The cause of no display failure is mostly caused by damage to the thick film of the switching power supply.
(4)
An ERR fault is an undervoltage fault, which is usually caused by a problem in the voltage detection loop resistance or wiring, rather than an actual undervoltage in the actual input voltage. Most of the A200 series OC faults are caused by the damage of the drive circuit. Its drive circuit uses a ceramic packaged thick film circuit, which brings certain difficulties for maintenance. The thick film circuit is mainly based on a drive light. Coupled with the design of the circuit.
(5)
In addition, we will encounter some LV faults. The occurrence of undervoltage faults is also mostly due to a fault in the bus detection circuit. Mitsubishi inverters have also designed a thick-film circuit for detecting voltage and current. The damage of the pulse transformer of the switching power supply is also a common fault of the A200 series inverter. Due to the short circuit of the output load of the switching power supply, or the sudden change of the bus voltage, the initial and secondary windings of the pulse transformer are damaged. Jinan Mitsubishi Service Center 2.2 A500 and E500 Series Common Faults The A500 series, E500 series, F500 series and S120 series are currently being promoted in the market. In the following, we will analyze the common faults of the A500 and E500 series and everyone.
(1)
For the A500 series we sometimes encounter UV (undervoltage) faults, we can check the rectifier circuit. The rectifier bridge of the A500 series 7.5kW inverter has a built-in thyristor. When the inverter is in normal operation, it is used to cut off the charging resistor. The damage of the built-in thyristor will lead to the occurrence of undervoltage fault. Switching power supply damage is also a common fault of A500 series inverters, and the common damage device is a waveform generator chip. This chip damage is usually caused by a sudden change in operating voltage. In addition, we still often encounter damage to the CPU board during normal maintenance. Common fault alarms are E6, E7, and damaged devices are mainly concentrated on the CPU board.
(2)
For the E500 series inverters, the common faults we encounter are Fn faults, which are mainly caused by the damage of the fan. However, the inverter does not block the output when there is an alarm.
3 Concluding remarks It should be said that Mitsubishi inverter faults in use are diversified, and it is hoped that more people engaged in the frequency conversion and speed regulation industry will join this rank in order to better solve some problems for the majority of users. Jinan Mitsubishi Service Center
[Edit this paragraph]
Mitsubishi inverter FR-A740 Series Introduction ■Power Range: 37～160kW
â– High-precision torque/speed/position control in closed loop â– Sensorless vector control for torque/speed control â– Built-in PLC function (special models)
â– Long-life components, built-in EMC filter â– Powerful network communication function, support DeviceNet, Profibus-DP, Modbus and other protocols
[Edit this paragraph]
Mitsubishi Inverter FR-F740 Series â—† Power Range: 37~220KW
â—† Simple magnetic flux vector control method achieves 120% output torque at 3Hz
â—† Adopt best excitation control mode to achieve higher energy-saving operation â—† Built-in PID, inverter/power frequency switching and multi-pump circulation operation function â—† Built-in independent RS485 communication port â—† Use long-life components â—† Built-in noise filter ( 75K or more)
â—† With energy-saving monitoring function, energy-saving effect at a glance
[Edit this paragraph]
Mitsubishi Inverter FR-E540 Series â—† Power Range: 0.4~7.5KW (Three-phase 380V FR-E540 Series)
â—† Flux vector control is used to realize 150% torque output in 1Hz operation â—† PID, multi-speed selection in 15 stages, etc. â—† Built-in independent RS485 communication port â—† Flexible PWM to achieve lower noise operation â—† Select FR-PA02-02 simple type Panel or FR-PU04-CH LCD Display Panel Mitsubishi Inverter, PLC, AC Servo, Tension Controller, Jinan Warranty Service Center
Contact number: (0)18954186760