Mitsubishi Electric FATEC FR-A800 Manual page 81

5
BREAKDOWN MAINTENANCE
The time chart when an instantaneous power failure occurs to the inverter
Fault warning output relay
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5.2 Troubleshooting by the demonstration machine
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[F102 (Pr.13)
Starting frequency]
Approx. 20 ms
ON
Power supply
R/L1, S/L2, and T/L3
Start STF (STR)
Inverter output shutoff
Instantaneous power
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failure operation
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A800 F700
and are activated when the power is restored within 15 to 100 ms. However, the fault output signal is
not activated due to the automatic restart after instantaneous power failure function when the automatic restart after
instantaneous power failure function [A702 (Pr.57)] is set as follows: 0 or 0.1 to 5 seconds for a capacity 55K or less; 0 or
0.1 to 30 seconds for a capacity 75K or more.
E700 and D700 restart operation from the starting frequency without fault output even if the power is restored after
the inverter output shutoff.
However, when the automatic restart after instantaneous power failure function [A702 (Pr.57)] is set to 0 or 0.1 to 5
seconds, the automatic restart after instantaneous power failure is activated.
An instantaneous power failure for 100 ms or longer is equivalent to a long time power failure. If the start signal is on, the
inverter restarts when at the power is restored.
A800 F700
Within 15 ms
E700 D700
Within 10 ms
ON
Coasting
t
A800 F700
E700 D700
Over 15 ms
Over 10 ms
A800 F700
15 ms or more and less than 100 ms
ON
ON
ON
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