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Routine examination and periodical examination
Inverter requires routine and periodical examination and maintenance
Carry out the examination only after the “ Power LED ” indicator goes off for at least 5 minutes
Examination
period
Maintenance
item
Maintenance
description
Routine 1 Year
Examination
method
Criterion
Countermeasure
Reconfirm environment
temperature and humidity
Refer to installation
instructions and measure
with thermometer and
hygrometer
Temperature: -10~40
OC Humidity: under 95%
without condensing
Installation site
environment
Check and remove any
flammable material nearby
Visual inspection No foreign object
Improve installation
site environment
Is there any abnormal
vibration on the installation
site?
Visual and audio
Inspection
No foreign object Tighten loose
screw
Inverter
Installation and
Grounding
Is the grounding resistance
within acceptable range?
Measure resistance by
multi-meter
200V class under 100
ohm
Improve grounding
Input power
source voltage
Is the voltage of the primary
circuitry normal?
Measure voltage by
multi-meter
Voltage level conforming
specification
Improve input
power source
Is the tighten parts secured?
Is there any sign of breakage
on the terminal panel?
Inverter
external
terminal
mounting
screw
Is there any obvious rusty
condition?
Visual inspection. Use
screwdriver to verify
screw tightness
No abnormality
Tighten loose screw
or return for repair
Is it deformed or skewed?
Internal wiring
of inverter
Is the insulation of wire
broken?
Visual inspection
No abnormality
Replace or return
for repair
Heat-sink Is it accumulating dust or
dirt?
Visual inspection No abnormality Clean up dust or dirt
Is it accumulating conductive
metal or oil stain?
PCB
Is there any over-heated or
burnt component?
Visual inspection
No abnormality
Clean up or replace
PCB
Is there any abnormal
vibration or noise?
Visual and audio
inspection
Replace cooling fan
Cooling fan
Is it accumulating dust or
dirt?
Visual inspection
No abnormality
Clean up
Power
component
Is it accumulating dust or
dirt?
Visual inspection No abnormality
Clean up
Is there any sign of strange
order or leakage?
Capacitor
Is there any sign of swelling
or bulging?
Visual inspection No abnormality Replace capacitor
or inverter
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