![background image](http://html1.mh-extra.com/html/nidec/leroy-somer-d510-c/leroy-somer-d510-c_installation-and-maintenance-manual_1687795058.webp)
2019.02 / p
Electric Power Generation
58
Installation and maintenance
D510 C
Digital voltage regulator
4243 en -
OK
OK
OK
OK
OK
Fault
Fault
Fault
Voltage matching impossible
Check that there is a mains
voltage on terminals L1
and L2 of the D510C
Check that U = U mode
has been enabled
(yellow LED on)
Replace the AVR
Check and modify, if
necessary, the wiring of
the digital input
DI1 DI2
Start generator and
control running
Modify the wiring
Check the wiring of the
mains voltage on
terminals L1, L2