High lift converter maintenance case
Customers: Shenzhen City, a building (Property Management Company)
Name: high lift
Model: L1-B-4015
Cause of failure: no display
Fault analysis: many fault elevator inverter is because of its high temperature working environment and make the elements easily caused by aging, the elevator control room at the top of the building installation inverter, often by the sun in the summer sun, heating plus inverter itself and braking resistor, the electrical indoor temperature is very high, the high temperature working environment will shorten the service life of electronic components! The inverter is more obvious in this aspect, so the elevator electrical room in the design should pay attention to the problem of ventilation in heat insulation, such as hollow brick walls, the room top multilayer design, if coupled with air conditioner, life of a lot of inverter! The electric cabinet installation of inverter in Xiamen days if the internal temperature is high, the electric cabinet door open, I have seen many manufacturers of electric cabinet design is too small! Just can be installed on the inverter! Did not install the cooling fan! On the maintenance of Elevator Inverter Daily: now the elevator is with inverter control, when the inverter fault will bring inconvenience to many people, will be anxious if management personnel, usually for maintenance of inverter, can greatly reduce the failure rate of the inverter, we repair a large number of Elevator Inverter, summed up several notes the usual maintenance problems:
1) elevator electrical room temperature can not be too high, otherwise the inverter components are easy to aging, preferably with air conditioning, the effect is quite good!
2) to prevent rain water, usually in a typhoon, the window wind blown the inverter rainwater.
3) lightning protection, this is related to the whole building or the whole area of lightning protection facilities, the frequency of the inverter is generally damaged by lightning.
4) cooling fan inverter timing to the dust, the sound of running or not to be replaced.
5) elevator motor has abnormal sound is usually the inverter has a problem, such as motor three-phase current imbalance, then it is best to repair, wait until the inverter is not completely damaged may be more serious. If you do not have the maintenance experience will not repair their own, many people make the inverter worse.
The customer is in the rain when the elevator installation roof caused no display fault detection by frequency converter, input module and power supply were burned, repair power supply electricity in the detection of the output waveform of normal measurement. Replacement of the same type of power input rectifier module after the whole test is normal.
Jia Hong Wei maintenance hotline: 13640994287 075528916839 Shaw