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H High Performance Universal Inverter User Manual
Chapter 8 Routine Repair and Maintenance
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8.2 Periodic Maintenance
It needs to perform periodic inspection on the inverter once every three to six months according to the
application environment and work conditions.
Item
Inspection Contents
Inspection Means
Criteria
Main circuit terminal
Screwdriver/sleeve
The screws are tightened and the
cables are intact.
PE terminal
Screwdriver/sleeve
The screws are tightened and the
cables are intact.
Control circuit terminal
Screwdriver
The screws are tightened and the
cables are intact.
Reliability of internal
connections and
connectors
Screwdriver and
hands
Connection is firm and reliable.
Expansion card
connector
Screwdriver and
hands
Connection is firm and reliable.
Mounting screws
Screwdriver/sleeve
The screws are tightened.
Cleaning the dusts
and powders
Cleaner
There are no dusts and wools.
Inverter
Internal foreign
objects
Visual check
There are no foreign objects.
Motor
Insulation test
500VDC megameter
Normal
8.3 Component Replacement
Different types of components have different service lives. The service lives of the components are
subject to the environment and application conditions. Better working environment may prolong the
service lives of the components. The cooling fan and electrolytic capacitor are vulnerable components
and shall be conducted routine inspection as per the table below. If any fault occurs, please conduct
immediate replacement.
Vulnerable
Components
Damage Causes
Solutions
Items for Routine Inspection
Fan
Bearing wear, blade
aging
Change
The fan blade has no cracks and rotates
normally. The screws are tightened.
Electrolytic
capacitor
Ambient temperature
is relatively high and
electrolyte volatilizes.
Change
There are no electrolyte leakage, color
change, crack and shell inflation. The
safety valve is normal.
Static capacity is equal to or higher than
the initial value times 0.85.
Note
Note
When the inverter is stored for a long period of time, power connection test shall be conducted once
within two years and last at least five hours. It can use voltage regulator to gradually increase the
value to the rated value when power connection is performed.