Shanghai Sigriner STEP Electric Co., Ltd.
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1) Whether the surrounding environment meets the standard specifications;
2) Whether the operation performance meets the standard specifications;
3) Whether there is abnormal noise, vibration and abnormality;
4) Whether the cooling fan installed on the inverter operates normally;
5) Whether there is overheating.
9.4 Periodic inspection
During regular inspection, stop running first, and remove the shell after cutting off the power supply.
At this time, there is still charging voltage on the energy storage capacitor in the main circuit, so, the
discharging will take some time. Therefore, the inspection can only be after the charging indicator is
off, and a multimeter is used to test that the DC bus voltage is lower than the safe value (below DC
24V)
If you touch the terminal immediately after cutting off the power supply, there will be a danger of
electric shock.
See Table 9.1 for the regular inspection items.
Table 9.1 Regular Inspection Items
1) Confirm the ambient temperature, humidity,
vibration and existence of dust, corrosive
gas, oil mist, water droplets, etc.
2) Whether there are any dangerous goods
around
1) Visual inspection,
thermometer,
hygrometer
2) Visual inspection
1) The ambient
temperature is lower
than 40℃. Humidity
and other requirements
meet environmental
requirements
2) No dangerous goods
1) Whether the LCD display is clear and the
backlight is uniform
2) Whether there are missing LCD characters
displaying
1) Uniform backlight
2) Normal display
Connector
Terminals and
bolts
1) Whether the bolt is loose
2) Whether the connector is loose
1) Tighten
2) Visual inspection
1) No abnormalities
2) Secure installation
1) Whether the protective layer is cracked and
discolored
2) Whether the shape of the connecting copper
bar is deformed
Electrom
agnetic
contactor
and relay
1) Whether there is vibrating sound at work
2) Whether the contact is closed
Auditory and visual
inspection
1) None
2) There is contact
closing sound
Energy
storage
electrolyt
ic
capacitor
1) Whether there is leakage, discoloration,
cracking and shell expansion
2) Whether the safety valve comes out and
whether the valve body expands significantly
1) Whether there is dust accumulation
2) Whether the fan duct is blocked or attached
with foreign objects
1) Whether there is abnormal noise
2) Whether there is abnormal vibration
3) Whether it is discolored and deformed due to
overheating
1) Auditory and visual
inspection, turn the
fan blade by hand
after cutting off the
power supply
2) Visual inspection
3) Visual inspection,
sense of smell
1) Smooth rotation
2), 3) No abnormalities
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