Chengdu BB inverter, Chengdu BB inverter price, Chengdu BB inverter model, Chengdu BB inverter repair, find the professional BB inverter agent Wuxi Jincheng Electric! Wuxi Jincheng Electric supplies [spot inventory and special price BB spare parts] to the whole country all year round, and provides professional maintenance services for BB inverters! Sales maintenance hotline: -/ Manager Gao/Consultation 3 The following discussion is the maintenance process and fault analysis of BB inverter display fault. For reference.
Inspection process: Disassemble the frequency converter, check the rectifier module and inverter module of the frequency converter, and test whether the diode characteristics are good. Power on the inverter and it will display normal operation. The three-phase output voltage of the inverter is balanced. After running with load for half an hour, the inverter will display.
Fault explanation:
Check the external ambient temperature.
. Check the inverter cooling fan.
Check the internal heat dissipation channels of the inverter.
Check whether the motor and inverter do not match.
, Temperature check circuit failure.
Analysis of the cause of the failure:
According to the explanation of the failure, the possible reasons for the failure are:
. The external environment temperature is too high.
. The inverter cooling fan does not rotate.
The heat dissipation channel of the inverter is blocked.
, the inverter and the motor do not match.
The temperature detection circuit is faulty.
First, test the first possibility. The external ambient temperature is about 10 degrees, which can be said to be within the allowed operating range of the inverter. It is installed in an electrical room. There are many inverters with the same power in the electrical room and there is no such fault. Secondly, check the cooling fan of the frequency converter. As long as the inverter is running, the fan will rotate and can stop until the sound of the fan is heard. Remove the fan and test it, it works normally. Third, the power of the inverter and motor do not match. This inverter has been running for several years and has never had this fault. And there is no overcurrent or overload fault before the fault is displayed. Therefore this assumption does not hold true either. Fourth, it is possible that there is a problem with the temperature detection loop. Don't rule it out first, wait until the power is turned on and test. Fifth, the heat dissipation channel is blocked. After completely disassembling the inverter, it was found that the heat dissipation channel of the machine was indeed blocked. As a result, the inverter cannot dissipate heat. So this is the cause of the damage.
Maintenance process: First clean the heat dissipation channel of the inverter, then install the board and capacitor box in sequence, and test to ensure that the power-on conditions are met. Power is supplied to the inverter, turned on, the output voltage is balanced, and the load reaches the rated current. The inverter heats up normally and the inverter is repaired. Therefore, the inverter display failure is caused by the blockage of the heat dissipation channel. The possibility of damage to the temperature detection circuit is ruled out.
Experience summary: Based on years of experience in repairing BB inverters, Wuxi Jincheng Electrical Maintenance Service Center concluded that in most cases, the fault is caused by the blockage of the heat dissipation channel of the inverter itself. Jincheng Electric helps you solve the maintenance problem of BB inverter
Provide free inspection for Chengdu ABB frequency converter ACS800 maintenance