Mains/AC side low (under-) voltage. See also 3280.
The firing angle is forced to 150° and single firing pulses to
suppress the DC current are given.
Check:
− The setting of 31.51.Mains loss mode, 31.52 Mains loss down
time, 31.53 Mains loss low level 1 and 31.54 Mains loss low
level 2.
− That the mains voltage scaling is correct. See 99.10 Nominal
mains voltage.
− The cutting of the voltage coding resistors on the SDCS-PIN-
H51.
− The condition of the mains (voltage, cabling, fuses,
switchgear).
− That all 3 phases are present directly at the drive.
− H1 ... H5: measure the fuses F100 ... F102 on the
SDCS-PIN-H01.
− H6 ... H8: check and measure the connections
XU1/XU2, XV1/XV2 and XW1/XW2 on the SDCS-PIN-
H51.
− That the mains voltage is within the set tolerance.
− For mains supply imbalance.
− For loose mains cable connections.
− That the mains contactor closes and opens.
− For H1 ... H4, that the field circuit has no short circuit or
ground fault.
− In case an On command is given and the measured mains
voltage is too low for longer than 500 ms A111 Mains low
voltage is set. If the problem persist for longer than 10 s 3280
Mains low voltage is generated.