5-14
5.4 Routine and periodic inspection
To ensure stable and safe operations, check and maintain the inverter at regular intervals.
Use the checklist below to carry out inspection.
Disconnect power after approximately 5 minutes to make sure no voltage is present on the output terminals
before any inspection or maintenance.
Items Details
Checking
period
Methods Criteria Remedies
Daily 1Year
Environment & Ground connection
Ambient
conditions at
the installation
Confirm the temperature
and humidity at the machine
◎
Measure with
thermometer
and
hygrometer
Temperature:
-10 ~40°C
(14~120°F)
Humidity:
Below
95%RH
Improve the
ambient or
relocate the
drive to a
better area.
Installation
Grounding
Is the grounding resistance
correct?
◎
Measure the
resistance
with a
multi-tester
200Vclass:
below 100Ω
Improve the
grounding if
needed.
Terminals & Wiring
Connection
terminals
Any loose parts or
terminals?
◎
Visual check
Check with a
screwdriver
Correct
installation
requirement
Secure
terminals and
remove rust
Any damage to the base ?
◎
Any corroded Terminals? ◎
Wiring
Any broken wires? ◎
Visual check
Correct wiring
requirement
Rectify as
necessary
Any damage to the wire
insulation?
◎
voltage
Input power
voltage
Is the voltage of the main
circuit correct?
◎
Measure the
voltage with a
multi-tester
Voltage must
conform with
the spec.
Improve input
voltage if
necessary.
Circuit boards and components
Printed circuit
board
Any contamination or
damage to printed circuit
board?
◎
Visual check
Correct
component
condition
Clean or
replace the
circuit board
Power
component
Any dust or debris ◎
Clean
components
Check resistance between
terminals
◎
Measure with
a multi-tester
No short
circuit or
broken circuit
in three
phase output
Consult with
the supplier
Cooling System
Cooling fan
Unusual vibration and
noise?
◎
Visual and
sound check
Correct
cooling
Consult with
the supplier
Excessive dust or debris ◎
Visual check
Clean the fan
Heat sink Excessive dust or debris ◎
Clean up
debris or dust
Ventilation Path
Is the ventilation path
blocked?
◎
Clear the
path
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