Section 10 maintenance – Toshiba VT130G1 User Manual

Page 38

Attention! The text in this document has been recognized automatically. To view the original document, you can use the "Original mode".

Section 10

MAINTENANCE

Chsck the following Items monthly.

Bsfore performing inspection, be sure to open the input circuit breeker (MCCB). Wiit
for it least 5 minutes, and check that the “CHARGE" lemp Is “OFF’’ and then start

inspection. The “CHARGE" lamp being "ON" Indicates that the inverter unit is still

energized by the main capacitor.

Check for loose wiring at terminals and damaged wires.

Check that the vents are not clogged by dust or debris.

Check that there is no dust on the printed wiring board and inside the unit.

if the inverter unit has been unuaed for a long period, turn on the power at least

once every six months to check its operation. The protection against dust, cor

rosive gas. high temperature, and excessive humidity must be continued during

any unused period. Periodic inspection is required.

Oo not allow excessive vibration of the unit since damage mey occur.

If necessary, perform megger test only for main circuit tsrmlnsis with a OC 500 V
megger,

Note: Perform megger test with the terminals shorted. Do not test the

terminals on the printed circuit board with a megger.

Measuring instruments

Measuring instruments may not ahow the correct measurements because of the

PWM output wave forms. Use the following inetrumente et the specified locations.

MMturtmtni

inttrumem typt

Location

Outpui

von«9«

typ« analog vettmotor

Output taminaii U, V, W

Currtflt

Meving^ron t/po CT

each phaa« of motor and invonat

Eiootrodynamoffiotaf typ«

input to invtnor