Shenzhen Hpmont Technology Co., Ltd Chapter 8 Maintenance
HD20 Series Inverters User Manual ―111―
Chapter 8 Maintenance
Many factors such as ambient temperature, humidity, dust, oscillation, internal component aging,
wear and tear will give rise to the occurrence of potential faults. Therefore, it is necessary to
conduct daily maintenance to the inverter.
• If the inverter has been transported for a long distance, please check whether the components
of the inverter are complete and the screws are well tightened.
• Please periodically clean the dust inside the inverter and check whether the screws are loose.
• Only a trained and qualified professional person can maintain the inverter.
• Maintenance personnel should take off all metal jewellery before carrying out maintenance or
internal measurements in the inverter. Suitable clothes and tools must be used.
• High voltage exists when the inverter is powered up or running.
• Checking and maintaining can only be done after the inverter’s AC power is cut off and wait for at
least 10 minutes. The cover maintenance can only be done after ensured that the charge indicator
inside the inverter and the indicators on the display panel are off and the voltage between main
circuit power terminals (+) and (-) is below 36V.
• For the inverter stored for more than 2 years, please use voltage regulator to increase the input
voltage gradually.
• Do not leave metal parts like screws or pads inside the inverter.
• Do not make modification on the inside of inverter without instruction from the supplier.
• There are IC components inside the inverter, which are sensitive to static electricity. Directly touch
the components on the PCB board is forbidden.
8.1 Daily Maintenance
The inverter must be operated in the specified environment (refer to section 3.2, page 11).
Besides, some unexpected accidents may occur during operation.
Therefore you should maintain the inverter conditions according to the Table 8-1, record the
operation data, and investigate problems immediately.
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