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Chapter 8Inverter Inspection and Maintenance
Chapter 8Inverter Inspection and Maintenance
Chapter 8Inverter Inspection and Maintenance
8.1 Inspection and Maintenance
The following influences may lead to latent failure of the inverter such as
ambient temperature, humidity, dust, vibration, as well as device ageing,
wear and other causes of the inverter itself during long-period operation on
industrial occasions. So it is necessary to perform daily and periodic
inspections and maintenance on the inverter.
8.1.1 Daily Inspection Items
Table 8-1 Daily Check List
Target of
Inspection
T
ar
get
of
Inspection
Check Content
Inspection Cycle
Inspection
Method
Criteria
Measuring
Instrument
Daily
Daily
Daily
Daily
Operating
ambient
Inverter
Motor
Electric
Parameter
Ambient
temperature;
Humidity,
dust, corrosive
gas, oil mist and
etc.
Thermometer;
Scent;
Visual.
Ambient
temperature
between -10 to
40
, no-
condensing;
Humidity
between 20 to
90%
no dew
or special odo
Thermometer
Hygrometer
Vibration
Heat
Noise
Vibration
Heat
Noise
Touch the
housing;
Aural.
Touch the
housing;
Aural.
Stable
vibration
Normal
temperature
No abnormal
noise
Stable
vibration
Normal
temperature
No abnormal
noise
Input voltage
Output voltage
Output current
Thermometer
Each electric
parameter is
within the rated
value.
Moving-iron
voltmeter;
Rectifier
voltmeter;
Clip-on ammeter
WARNING
Make sure that only qualified personnel will perform maintenance,
inspection and part replacement.
Wait at least 10 minutes after turning OFF the input power supply
before performing maintenance or an inspection. Otherwise, there is the
danger of electric shock.
Make sure to open the front panel only after the indicator on the control
keypad turns OFF and verify the charge indicator at the right side of main
loop terminal is OFF after the panel is opened.
Do use an insulated appliance while performing check and do not
operate the equipment with wet hand(s) to avoid unexpected accidents.
Always keep the equipment clean so that dust and other foreign matter
does not enter the inverter.
Keep electronic equipment away from moisture and oil. Dust, steel
filings and other foreign matter can damage the inverter, causing
unexpected accidents, so do take special care.
8.1.2 Periodic Inspection Items
Table 8-2 Periodic Inspection Items
Inspection
Items
Contents of
Inspection
Inspection Cycle
Inspection
Method
Criterias
Main
circuit
Overall
Main power
module
Filter
capacitance
Contactor
Regular
Regular
Regular
Regular
Visual
Visual
Visual
Visual
Aural
Check if there is
any loose connector
or terminal.
Check if there is
any device burnt.
No loose connector
or loose terminal.
No burnt device.
Check if it is
damaged or not.
No sign of damage.
Check if there is any
leakage.
Check if there is any
inflation.
No leakage;
No inflation.
Check if there is
any abnormal sound
of actuation.
Check if dust has
been cleaned.
Normal sound;
Clean.