TECO 7300EV, Быстрый старт, Страница: 81 / 93

Chapter 5 Trouble shooting and maintenance
5-13
5.4 Routine and periodic checks
To ensure stable and safe operations, check and maintain the inverter regularly and periodically.
The table below lists the items to be check to ensure stable and safe operations.
Check these items 5 minutes after the “Charge” indicator goes out to prevent service persons from
being hurt by residual electric power.
Checking
period Items Details
Daily 1 year
Methods Criteria Remedies
Confirm the temperature
and humidity around the
machine
○
Measure with
thermometer and
hygrometer
according to
installation notices.
Temperature: -10 –
50
o
C
Humidity: Below 95%
RH
Circumstances
around the
machine
Are there inflammables
piled up around?
○
Visual check No foreign matters
Improve the
circumstances
Any unusual vibration from
the machine
○
Visual, hearing No foreign matters Secure screws
Installation and
grounding of
the inverter
Is the grounding resistance
correct?
○
Measure the
resistance with the
Ground Resistor
200V series: below
100
ȍ
400V series: below
10
ȍ
Improve the
grounding
Input power
voltage Is the voltage of the main
circuit correct?
○
Measure the
voltage with a
multi-tester
Voltage must conform
with the specifications
Improve input voltage
Are secure parts loose?
○
Is the terminal base
damaged? ○
External
terminals and
internal
mounting
screws of the
inverter
Obvious rust stains ○
Visual check
Check with a
screwdriver
No abnormalities
Secure or send back
for repair
Deformed or crooked
○
Internal wiring
of the inverter
Any damage of the
wrapping of the
conducting wire
○ Visual check No abnormalities
Replace or send back
for repair
Heat sink Heap of dust or mingled
trifles ○ Visual check No abnormalities Clean up heaped dust
Heap of conductive metal
or oil sludge
○
Printed circuit
board
Discolored, overheated, or
burned parts
○
Visual check No abnormalities
Clean up or replace
the circuit board
Unusual vibration and noise
○
Visual or hearing
check Replace the cooling
fan
Cooling fan
Heap of dust or mingled
trifles
○
Visual check
No abnormalities
Clean up
Heap of dust or mingled
trifles
○
Visual check No abnormalities Clean up
Power
component
Check resistance between
each terminals
○
Measure with a
multi-tester No short circuit or
broken circuit in
three-phase output Replace power
component or
inverter
Any unusual odor or
leakage ○
Capacitor
Any inflation or
protrusion
○
Visual check No abnormalities
Replace capacitor or
inverter