Inspection item
INSPECTION AND MAINTENANCE 160
6. INSPECTION AND MAINTENANCE
6.1 Inspection item
6.1.1 Daily inspection item
Inverter is mainly composed of semiconductor components. In order to prevent faults caused by influence of
environment such as temperature, humidity, dust and vibration, or aging and service life of used parts, users must
do daily inspections
1. Whether the surrounding environment for installation is normal (temperature, humidity, dust density around
inverter).
2. Whether the power supply voltage is normal (whether the three-phase voltage between terminals R/L1, S/L2
and T/L3 is normal).
3. Whether the wirings are firm (whether the external wirings of the main circuit terminal and the control board
terminal are firm).
4. Whether the cooling system is normal (whether there is abnormal sound at the fan operation and whether the
connecting wire is firm).
5. Whether the indicator light is normal (such as LED indicator on control board, LED indicator on keypad and LED
on keypad screen).
6. Whether the motor is running as expected.
7. Whether there is abnormal vibration, sound or smell at the motor operation.
8 Whether there is liquid leakage in the filter capacitor on the capacitor board.
Pay attention to safety during inspection!
6.1.2 Regular inspection items
Check the places that can be inspected only when the operation is stopped and require regular inspections of
specific places.
1. Check whether the connectors and connecting wires are normal (check whether the connectors and connecting
wires between the main circuit board and the control board are firm or is damaged).
2. Check whether the components on the main circuit board and control board are overheated.
3. Check whether the electrolytic capacitors on the main circuit board and control board are leaking.
4. Check the IGBT module on the main circuit board.
5. Make sure to clean the dust and foreign objects on the circuit board.
6. Check the insulation resistance.
7. Whether the cooling system is abnormal (whether the fan cable is secure, please clean the air filter/air duct).
8. Check whether the fixing device is firm, and tighten the fixing screw.
9. Check whether the external wires and terminal block are damaged.
Pay attention to safety during inspection!
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