10-27
10.7 If the Inverter is Running on Single-Phase Power
[ 1 ] The AC fan(s) does not work. (230 V series with 60 HP or above or 460 V series with 125 HP or above)
Possible Causes
Suggested Measures
The power supply is connected to
the main circuit power input
terminal L2.
Connect the power supply to L1 and L3.
[ 2 ] _ _ _ _ (under bar) appears
Possible Causes
Suggested Measures
The power supply is connected
to the main circuit power input
terminal L2 and the main power
down detection is activated.
Connect the power supply to L1 and L3.
[ 3 ] The motor does not run as expected.
Possible Causes
Suggested Measures
Large voltage ripple inside the
inverter due to single-phase
power
When the inverter runs on single-phase power, the voltage ripple becomes larger
than that on three-phase power so that an operation error span becomes wider,
causing lower performance than expected.
To improve the accuracy in operation, use the inverter on three-phase power.
[ 4 ]
Charger circuit fault (230 V series with 60 HP or above or 460 V series with 125 HP or above)
Possible Causes
Suggested Measures
The power supply is connected
to the main circuit power input
terminal L2.
Connect the power supply to L1 and L3.
[ 5 ]
Input phase loss
Possible Causes
Suggested Measures
The input phase loss protection
is activated.
Disable the input phase loss protection by switching Bit 1 of H98 to "0." When
switching from the factory default of H98, modify the H98 data from 82 to 81 in
decimal.
[ 6 ]
Heat sink overheat,
Inverter internal overheat, or
Inverter overload
Possible Causes
Suggested Measures
The inverter was running with
load exceeding the single-phase
rating.
To run the inverter on single-phase power, it is necessary to derate the output to
the lower level than that on three-phase power.
Review the load conditions to run the inverter within the single-phase rating, or
increase the inverter capacity.
Содержание EQ7 Series
Страница 1: ......
Страница 29: ...2 6 Unit inch mm Refer to Section 2 3 3 9 ...
Страница 94: ...4 25 Table B Motor Parameters Continued Three phase 460 V series EQ7 4_ _ _ C ...
Страница 152: ...4 83 Examples of Sequence Circuits 1 Standard sequence 2 Sequence with an emergency switching function ...