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to the inverter because of the poor insulation of the motor. It is recommended to use a 500V
Mega-Ohm-Meter for the insulation test and the insulation resistance shall not be less than 5M.
The motor connections (U, V and W) must be completely disconnected from the inverter during
the insulation test.
3) If the rated capacity of the motor selected does not match that of the inverter, especially when
the rated power of the inverter is higher than that of the motor, make sure to adjust the
parameters of the inverter for motor protection or install a forestage thermal relay for the motor.
4) The output frequency of this inverter is 0 to 3200Hz. Please consider the capability of the
mechanical devices when the inverter is to run at the frequency higher than 50Hz.
5) Because the inverter outputs PWM wave, the capacitor used for improving power factor and
varistor used for lightning protection shouldn't be installed at the output side of the inverter,
otherwise the inverter may have transient over-current and may be damaged. Since the output
voltage of the inverter has some harmonics, it is normal that the temperature may rise, and the
noise and vibration may increase compared with the inverter running at main frequency.
6) When the altitude is higher than 1000m, the cooling effect of inverter is deteriorated due to the
rarefaction of air, the deration must be adopted.
7) The electrolytic capacitors in the main circuits and on the PCB may explode when they are
burned and poisonous gas may be generated when the plastic parts are burned. Please dispose
the inverter as industrial rubbish.
1.4 Maintenance
1. Daily checking items
1) Check if there is any vibration of motor;
2) Check if the installation environment of inverter changes;
3) Check if the cooling fan of inverter works normally;
2. Periodical Checking items:
1) Check the fan and clean them periodically
2) Check if the screws are loose
3) Check if the inverter is rusted
4) Check if the connection terminals are loose
Check the insulation in main circuit
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