AC70 VC CONTROL FREQUENCY INVERTER MANUAL
PERIODIC OVERHAUL AND MAINTENANCE
61
：
No operation under power connected state. Otherwise there is danger of electric shock death. Before
operation, please cut all related equipments power, ensure that the main circuit DC current has dropped to safe range.
And please operate after 5 mins.
●
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.
Main circuit
Items
Checking content
Treatment
Whole body
Check insulated resistance;
Check circumstance.
Tighten and change bad component;
Clear and improve circumstance
Electric connection
●
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 damaged or loose.
●
Earth checking.
●
Change bad wire.
●
Fasten terminals and change bad
terminals.
●
Measure earth resistance and fasten
earth terminals.
Mechanical connection
●
Check if there is abnormal vibration
or noise or something is loose.
●
Tighten, lubricate and change the bad
machine components.
semi-conductive
component
●
Check whether there is dust or
rubbish.
●
If there is obvious out change?
●
Clear
●
Change damaged component
Electrolytic capacitor
●
Whether there is liquid leak, color
change,or creak? Whether there is
safety valve outcrop, inflation, creak or
liquid leak.
●
Change damaged component
Peripheral equipment
●
Peripheral equipment outlook and
insulation checking.
●
Clear and change damaged component
PCB
●
Bad smell,color change, bad rust and
connector checking.
●
Fasten connector
●
Clear PCB
●
Change bad PCB
Cooling system
●
Check whether the fan is damaged
or blocked up.
●
Whether rubbish and dust is sticked
to the heat sink .
●
Is air inlet/outlet blocked? Or is there
something sticking to the inlet/outlet.
●
Clear
●
Change damaged component
Keyboard
●
Whether is it damaged? Check
whether display is complete.
●
Change damaged component
Motor
●
Check if there is abnormal vibration
or noise.
●
Tighten machine and electric connection
and lubricate the machine components.
：
No operation under power connected state. Otherwise there is danger of electric shock death. Before
operation, please cut all related equipments power, ensure that the main circuit DC current has dropped to safe range.
And please operate after 5 mins.
6.3 Maintenance
All equipments and components have useful lifetime. Right maintenance can prolong the lifetime. But it can not avoid
damage. Please change the components before their lifetime over.
Component
Useful lifetime
Fan
2~3year
Electrolytic capacitor
4~5 year
PCB
8~10 year