Chapter 5 Periodic Overhaul And Maintenance - Veichi AC300 series Manual

5.1 Overhaul
Frequency inverter is composed by semi-conductive components, passive electronic component and motive component. All of these components
have useful life. Even under normal working environment, some of the components cannot work after the life time. To avoid malfunction, daily
checking, periodic overhaul, component changing and other maintenance should be carried out to prevent. We suggest one overhaul every 3-4
months after installation.
Daily checking
●
To avoid machine damage and to prolong life time, please check the following items every day.
Items
Power supply
Surroundings
Cooling system
Motor
Load
Periodic overhaul
●
Under normal state, one overhaul every 3 or 4 months is ok. Please confirm the actual overhaul period according to the machine use condition
and work circumstance while using the machine.
Items
Whole
Electric connection
Mechanical connection
semi-conductive
component
Electrolytic capacitor
Peripheral equipment
PCB

Chapter 5 Periodic Overhaul and Maintenance

Checking content
Check if power supply meets the
Requirement and whether there is lack-phase.
Check whether it meets the environment
requirement.
Check whether the inverter or the motor heat or
change color abnormally and cooling fan working
state.
Check if there is abnormal vibration or noise.
Check whether output current is over the rated
value of the motor or the inverter and has lasted
for a period.
Checking content
Check insulated resistance;
Check circumstance.
● Check whether the wire and connector color
changes, whether there is disrepair, crack
color change or aging in insulated layer.
● Check whether the connect terminals are
frayed, damaged or loose.
● Earth checking.
● Check if there is abnormal vibration or noise or
something is loose.
● Check whether there is dust or rubbish.
● If there is obvious out change
● Whether there is liquid leak, color change or
crack. Whether the safety valve outcrop,
inflation, creak or liquid leak.
● Peripheral equipment outlook and insulation
checking.
● Peculiar smell color change, bad rust and
connector checking.
Treat it as nameplate explains.
Make sure the problem and solve it.
Check whether it overload. Tighten screw. Check
whether cooling fan is dirty or stall rotate.
Tighten machine and electric connection and
lubricate the machine components.
Make sure whether it overload and whether the
machine model is right.
Tighten and change bad component;
Clear and improve circumstance.
● Change bad wires.
● Fasten terminals and change bad terminals.
● Measure earth resistance and fasten earth
terminals.
●Tighten, lubricate and change the bad
components.
● Clean operation environment
● Change damaged component
● Change damaged component
● Clear and change damaged component.
● Fasten connector
● Clear PCB
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Treatment
Treatment