Emerson elevator special inverter repair
Model: EV800
Breakdown: over voltage alarm
Fault analysis: this inverter for elevator special inverter, the inverter suddenly shows the customer response said alarm in operation, open the enclosure measurement module is normal, on the measurement of electric power is normal, in the static measurement when the brake pipe brake circuit to short-circuit detection circuit, and brake or brake coupler, brake pipe (MOS pipe well, can the series diode should be around 0.37, normal), gate resistance (i.e. MOS thyristor gate resistance, normal should be 100 ohms). Measurements show that the braking Drive Optocoupler and regulator to burn, red P (+), measured after the replacement of black PB, such as the voltage jump in 17 - 30, normal braking. The load of the measuring and running belt is normal.
Emerson inverter without display, lack of phase, over current, over voltage, under pressure, overheating, overload, grounding, parameter errors, there is no output, the module is damaged, the fault code, such as good can repair.
Jia Hong Wei repair service hotline: 0755-28916839, 13640994287 Shaw