10-8
10.4 Routine and Periodic Inspection
To ensure stable and safe inverter operation it is recommended to perform inverter maintenance at
regular intervals. Use the checklist below as a guideline for inspection.
Disconnect power and wait approximately 5 minutes to make sure no voltage is present on the output
terminals before carrying out any inspection or maintenance.
Items
Details
Checking
period
Methods
Criteria
Remedies
Daily 1Year
Environment & Ground connection
Ambient
conditions on
site
Confirm ambient
temperature and relative
humidity on site
◎
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.
Are there flammable
materials close to the
inverter?
◎
Visual check
Keep area
clear
Installation
Grounding
Any unusual vibration
from surrounding
machine
◎
Visual, hearing
check
Keep area
clear
Secure
screws
Is the grounding
resistance correct?
◎
Measure the
resistance with
a multi-meter
200Vclass:
below 100Ω
Improve the
grounding if
needed.
Terminals & Wiring
Connection
terminals
Check for loose
terminals
◎
Visual check
Check with a
screwdriver
Correct
installation
requirement
Secure
terminals and
remove rust
Check for damage to
base of inverter
◎
Check for corroded
Terminals
◎
Wiring
Check for broken wires
◎
Visual check
Correct wiring
requirement
Rectify as
necessary
Check wire insulation
◎
Input Voltage
Input power
voltage
Check input volatge
◎
Measure the
voltage with a
multi-meter
Voltage must
conform with
the spec.
Improve input
voltage if
necessary.
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