5-13
5.4 Routine and periodic inspection
To ensure stable and safe operation, 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 – 40oC
(14-120 )℉
Humidity:
Below
95%RH
Improve the
ambient or
relocate the
drive to a
better area.
Are there inflammable
materials in the
vicinity?
◎
Visual check
Keep area
clear
Installation
Grounding
Any unusual vibration
from the machine
◎
Visual, hearing
check
Keep area
clear
Secure
screws
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
Discolored, overheated,
or burned parts
◎
Capacitor
Any unusual odor or
leakage
◎
Replace
capacitor or
inverter
Any physical damage
or protrusion
◎
Power
component
Any dust or debris
◎
Clean
components
Check resistance
between each terminals
◎
Measure with a
multi-tester
No short
circuit or
broken circuit
in
three-phase
output
Consult with
the supplier
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