Chapter 9 Maintenance and Repair
200
第
十
章
Chapter 9 Maintenance and Repair
9-1.Inspection and Maintenance
During normal use of the inverter, in addition to routine inspections, the regular
inspections are required (e.g. the overhaul or the specified interval, and the interval shall
not exceed 6 months), please refer to the following table to implement the preventive
measures.
Check Date
Check
Points
Check
Items
Check to be
done
Method
Criterion
Routine Regular
√
Display
LED display
Whether display
is abnormal or
not
Visually
check
As per
use status
√
√
Cooling
system
Fan
Whether
abnormal noise
or vibration
exists or not
Visually
and
audibly
check
No abnormal
√
Body
Surrounding
conditions
Temperature,
humidity,
dust, harmful
gas.
Visually
check with
smelling and
feeling
As per
Section 2-1
√
Input/output
terminals
Voltage
Whether
input/output
voltage
is abnormal or
not
Test R, S,
T and U,
V, W
terminals
As per
standard
specifications
√
Main circuit
Overall
Whether these
phenomenon of
loose fastenings,
overheat,
discharging,
much dust, or
blocked air duct
exist or not
Visually
check,
tighten and
clean
No abnormal
Electrolytic
capacitance
Whether
appearance is
abnormal or not
Visually
check
No abnormal
Wires and
conducting
bar
Whether they are
loose or not
Visually
check
No abnormal
Terminals
If screws or bolts
are loose or not
Tighten
No abnormal
"√" means routine or regular check to be needed
Do not disassemble or shake the device gratuitously during check, and never
unplug the connectors, otherwise the system will not run or will enter into fault state and
lead to component failure or even damage to the main switching device such as IGBT
module.