Chapter IV Disassembly & Repair
- 46 -
Inverter parts (detection)
Check if the color of the wire of inverter changes, if the
resin filled in inverter has bullate bulge, and if all electrical
apparatus elements, connectors and wiring on inverter have
visible color or damage.
Input shorted (low voltage): when the red light is on
while the green light is off, there is no output. Resistance
grade detects the low-voltage connector. Replace the
converter if the resistance is zero or infinite.
Input shorted (three phase): the green light is always on
while the red light flashes (when loading). Resistance grade
detects the three-phase connector (each resistance between
every two connectors is required for detection). Replace the
converter if the resistance is zero or infinite.
Output shorted: when the green light is off while the red
light is on resistance grade detects the output end. Replace
the converter if the resistance is zero or infinite.
Microswitch
When the leaf spring is in the bouncing status,
measure the resistance between two output terminals
with ohmmeter. Replace the microswitch if the
resistance is zero.
When the leaf spring is in hold-down status,
measure the resistance between two output terminals
with ohmmeter. Replace the microswitch if the
resistance is infinite.
