117
第
十
章
第
十
章
第
十
章
Ch
ap
ter 8
Chapter 8 Maintenance and repair
8-1.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.
The different instruments may come to different measurement results when measuring. It is
recommended that the pointer voltmeter shall be used for measuring input voltage, the rectifier
voltmeter for output voltage, the clamp-on ammeter for input current and output current, and the
electric wattmeter for power.
