10-9
Circuit boards and components
Printed circuit
board
Check for damage to
PCBs
◎
Visual check
Correct
component
condition
Clean or
replace the
circuit board
Check for discolored,
overheated, or burned
parts
◎
Capacitor
Check for unusual odor
or leakage
◎
Replace
capacitor or
inverter
Check for any physical
damage or protrusion
◎
Power
component
Check for any dust or
debris
◎
Clean
components
Check resistance
between each terminals
◎
Measure with a
multi-meter
No short
circuit or
faulty
three-phase
output
Consult
factory
Peripheral device
Rheostat
Whether rheostat wiring
or connector are
damaged
◎
Visual check
No
abnormalities
Replacement
rheostat
Electromagnetic
Contactor
Check contacts and
connections for any
abnormality
◎
Replacement
Contactor
Unusual vibration and
noise
◎
hearing check
Reactor
Is there any
abnormalities
◎
Visual check
Replacement
Reactor
Cooling System
Cooling fan
Unusual vibration and
noise
◎
Visual or
hearing check
Correct
cooling
Consult with
the supplier
Excessive dust or
debris
◎
Visual check
Clean the fan
Heat sink
Excessive dust or debris
◎
Clean up
debris or dust
Ventilation Path
Is the ventilation path
blocked
◎
Clear the path