237
2. Output voltage 2. Voltmeter
2. Within the rated range and three-phase
equilibrium
3. Internal
temperature
3. Thermometer
3. The difference with the ambient
temperature is less than 35℃
8.2 Periodical maintenance
The users may carry out periodical maintenance of the drive once every 3 or 6 months according to the
operating environment.
Note
1. Only the specially trained professionals are allowed to dismantle, maintain and replace parts of the device.
2. Do not leave any screws or washers in the machine, otherwise, device damage may be caused.
General inspection details:
1. Check if the screws of the control terminal are loose. If so, use the screwdriver to fasten them.
2. Check if the main circuit terminals are properly connected and the connection part of copper bus is
over heated.
3. Check if there are any damage to the power cables and the control cables and check
particularly whether there are any wear on the cable sheath.
4. Check if the insulating tapes around the power cable lugs are stripped.
5. Clean out the dust on the circuit board and the duct. It is better to use the dust collector.
6. Before testing the grounding insulating performance of the drive, please short circuit all the input and
output terminals (R/L1, S/L2, T/L3, U/T1, V/T2, W/T3, P/B1, B2, +DC and -DC) of its main circuit
terminals first and then conduct the grounding test. It is prohibited to conduct the grounding test for a
single terminal; otherwise, the drive may be damaged. Please use 500V Mega-Ohm-Meter in the test.
7. To test the insulating performance of the motor, please test the motor independently after
disconnecting the input terminals U/T1, V/T2 and W/T3 of the motor from the drive; otherwise, the drive
may be damaged.
Note
1. The drive has passed the dielectric strength test before delivery. Thus, you should not conduct the test
again, improper test may damage the drive.
2. Be sure to replace the original components in the drive with the same model and same electric parameters;
otherwise, the drive may be damaged!
8.3 Replacing wearing parts
The wearing parts of the drive include cooling fan and filter electrolytic capacitor, whose service life depends
on the operating environment and maintenance status. The common service life is listed in the table below.
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