SECTION 4. DISASSEMBLY AND SERVICE
Inverter
Check whether colors of inverter’s leads have
changed, whether inverter’s packing resin has bulging
blisters, check whether all the inverter’s electric parts,
connectors, and connecting wires have visible color
change or damage.
Short circuit the input (low-voltage): Neither the red
nor the green light gets on, no output is produced. Use
the ohmmeter scale to measure low-voltage connectors,
if measured resistance value is zero of infinite, replace
the inverter.
Short circuit the input (3-phase): Green light
remains on all the time, red light flashes (during
loading). Use the ohmmeter scale to measure 3-phase
connectors (measure resistance between each two of
them), if the measured resistance value is zero or
infinite, replace the inverter.
Short circuit the output: Green light gets out, red
light remains on all the time. Use the ohmmeter scale to
measure output terminals, if measured resistance value
is zero or infinite, replace the inverter.
Inching switch
With spring leaves apart,use the ohmmeter
scale to measure resistance between two oputput
terminals. If measured resistance value is zero,
replace the inching switch.
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