Mitsubishi Electric FATEC FR-A800 Manual page 56

4
PREVENTIVE MAINTENANCE
Item
Across A and C
Alarm signal
Across B and C
 Use an FFT to measure the output voltage accurately. A tester or general measuring instrument cannot measure accurately.
 When the carrier frequency exceeds 5 kHz, do not use this instrument since using it may increase eddy current losses produced in
metal parts inside the instrument, leading to burnout. In this case, use an approximate-effective value type.
 When the setting of M405 (Pr.195) ABC1 terminal function selection is the positive logic
 A digital power meter (designed for inverter) can also be used to measure.
Measuring points and instruments
Measuring point Measuring instrument
Moving-coil type
(such as tester)
Remarks (reference measured value)
Conduction check ()
Across A
No conduction
and C
Across B
and C
4.2 Maintenance and inspection
<Normal> <Abnormal>
Conduction
Conduction No conduction
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