Shanghai professional LG inverter repair-no display failure on the panel

Shanghai
Inverter repair
The repair scope includes failure to start, overcurrent, overvoltage, undervoltage, overheating, overload, output unbalance, no display, switching power supply damage, module damage, ground fault, inability to adjust speed, current-limiting operation, etc.
Shanghai inverter repair
Maintenance process
The first step is to ask the user about the fault of the inverter.
The second step is to analyze the causes of such failures based on the user's fault description.
The third step is to open the repaired equipment, confirm the damaged components, and analyze the feasibility of repair and recovery.
The fourth step is to read and analyze the working principle of the circuit based on the working position of the damaged device to find out the cause of the damaged device.
The fifth step is to contact the customer, quote the repair price, and solicit the user’s repair opinions.
The sixth step is to find relevant components for replacement.
Step 7: After confirming that the inverter fault and its causes have been eliminated, power on and conduct the experiment.
Step 8: Enter the system when the inverter is working normally
Shanghai maintenance inverters are mainly divided into eight series
Series micro, sensorless vector control variable frequency speed regulators. Single-phase dedicated
series of small, sensorless vector control variable frequency speed regulators. Single-phase dedicated
Series of small, economical frequency conversion speed regulation, equipped with communication port and braking unit
/Series of high performance, equipped with communication port and braking unit.
Series fan and water pump type, transformer cabinet. Sensorless vector control frequency conversion speed regulation, overload capacity, minutes.
Series of high-performance, standard sensorless vector control frequency converters, equipped with a braking unit underneath.
Series standard (constant torque) high-power variable frequency speed regulator.
Model rated current description
Power (input single phase/output phase~)
Power (input single phase/output phase~)
Power (input single phase/output phase~)
Power (single-phase input/output phase~)/communication port
Power (single-phase input/output phase~)/communication port
Power (single-phase input/output phase~)/communication Port
Power input phase/output phase~)
Power input phase/output phase~)
Power input phase/output phase~)
Power input phase/output phase~)< br/> Power input phase/output phase~)
Power input phase/output phase~)
Power input phase/output phase~)
Power input phase/output phase~)
Power input phase/output phase~)