Emerson ST drive repair
Failure phenomenon: UU alarm
Fault analysis: this drive fault of DC bus voltage, power supply voltage is measured according to the fault circuit level has short circuit, electric UU detection driver board, measuring CVD normal voltage should be 2.6 - 2.7, measured 1.9, replacing the drive power components R51, R52, C36, C37, the power supply is normal display OK. Replace the power supply part of the electrolytic capacitor, to ensure that the power supply is normal. There will be no two fault. 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, such as fault code can be repaired.
Hong Jia Wei repair professional Emerson ST drive, Tamagawa ABB servo drive servo driver maintenance, maintenance, maintenance, SIEMENS SIEMENS servo drive servo driver, servo driver maintenance, maintenance of European Yaskawa, Fuji, Delta, OMRON, the branch, TECO, Moog, Norgren, Matsushita, Hitachi, SSB, servo drive Toshiba, Denso, Continental, pavas, Yaskawa servo, MITSUBISHI, SANYO and other brands of servo driver maintenance.
Emerson fault code
Fault code: UU
Fault type: DC bus voltage is insufficient.
Fault reasons: 1, AC input power supply voltage is low
2, when the external DC power supply is used, the DC bus voltage is low.
Fault code: OV
Fault type: DC bus voltage is too high
Failure reasons: 1, the mechanical inertia of the load, the reduction rate is set too small
2, mechanical load drive motor
Fault code: OI, AC**
Fault type: inverter output instantaneous over current
Failure reason: 1, the time limit of the slope is insufficient
2, in the inverter output of the relative phase or relatively short circuit
3, the inverter needs to identify the motor parameters
4, motor or motor connection change, inverter for motor parameters identification
Fault code: O.SPd
Fault type: stall
Fault causes: 1 motor speed is too large (usually by mechanical load drive motor and lead to
2, the measured parameters of the motor exceeds the range
Fault code: It.AC
Fault type: inverter output current
Fault causes: motor overload
Fault code: O.ht
Fault type: inverter overheating
Failure reason: 1, full load operation environment temperature is too high (as above 40 degrees C)
2, special operation frequent (in the low frequency of frequent DC braking
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