CV7300 Instruction Manual - TECO-Westinghouse Motor Company
CV7300 Instruction Manual - TECO-Westinghouse Motor Company
CV7300 Instruction Manual - TECO-Westinghouse Motor Company
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Chapter 5 Troubleshooting and maintenance<br />
5.4 Routine inspection and period inspection<br />
To ensure stable and safe operations, check and maintain the inverter regularly and<br />
periodically.<br />
The table below lists the items to be check to ensure stable and safe operations.<br />
Check these items 5 minutes after the “Charge” indicator goes out to prevent service<br />
persons from being hurt by residual electric power.<br />
Checking<br />
Items Details<br />
period Methods Criteria Remedies<br />
Circumstances<br />
around the<br />
machine<br />
Installation<br />
and grounding<br />
of the inverter<br />
Input power<br />
voltage<br />
External<br />
terminals and<br />
internal<br />
mounting<br />
screws of the<br />
inverter<br />
Internal wiring<br />
of the inverter<br />
Heat sink<br />
Printed<br />
circuit board<br />
Cooling fan<br />
Power<br />
component<br />
Capacitor<br />
Confirm the<br />
temperature and<br />
humidity around<br />
the machine<br />
Are there<br />
inflammables<br />
piled up around?<br />
Any unusual vibration<br />
from the machine<br />
Is the grounding<br />
resistance correct?<br />
Is the voltage of the<br />
main circuit correct?<br />
Are secure parts<br />
loose?<br />
Is the terminal base<br />
damaged?<br />
Daily 1Year<br />
Obvious rust stains ○<br />
○<br />
Measure with<br />
thermometer and<br />
hygrometer<br />
according to<br />
installation notices.<br />
Temperature:<br />
-10 – 40 o C<br />
Humidity: Below<br />
95% RH<br />
○ Visual check No foreign matters<br />
Improve the<br />
circumstances<br />
○ Visual, hearing No foreign matters Secure screws<br />
○<br />
○<br />
○<br />
○<br />
Measure the<br />
resistance with a<br />
multi-tester<br />
Measure the voltage<br />
with a multi-tester<br />
Visual check<br />
Check with a<br />
screwdriver<br />
200V series: below<br />
100Ω<br />
Improve the<br />
400V series: below grounding<br />
10Ω<br />
Voltage must<br />
conform with the<br />
specifications<br />
No abnormalities<br />
Improve input<br />
voltage<br />
Secure or send<br />
back for repair<br />
Deformed or crooked<br />
Any damage of the<br />
wrapping of the<br />
conducting wire<br />
○<br />
○<br />
Visual check No abnormalities<br />
Replace or<br />
send back for<br />
repair<br />
Heap of dust or<br />
mingled trifles<br />
○ Visual check No abnormalities<br />
Clean up<br />
heaped dust<br />
Heap of conductive<br />
metal or oil sludge<br />
○<br />
Clean up or<br />
Discolored,<br />
Visual check No abnormalities replace the<br />
overheated, or<br />
burned parts<br />
○<br />
circuit board<br />
Unusual vibration and<br />
noise<br />
Heap of dust or<br />
mingled trifles<br />
○<br />
○<br />
Visual or hearing<br />
check<br />
Visual check<br />
No abnormalities<br />
Replace the<br />
cooling fan<br />
Clean up<br />
Heap of dust or<br />
mingled trifles<br />
○ Visual check No abnormalities Clean up<br />
Check resistance<br />
between each<br />
terminals<br />
○<br />
Measure with a<br />
multi-tester<br />
Replace<br />
No short circuit or<br />
power<br />
broken circuit in<br />
component or<br />
three-phase output<br />
inverter<br />
Any unusual odor or<br />
leakage<br />
○ Visual check No abnormalities Replace<br />
capacitor or<br />
5-14
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