IAI America SSEL - Manual (Page 491)

469
Appendix
Erro
r No.
Erro
r name
Cau
se
Cou
nterm
ea
sure
d18
Speed loop underrun error
The driver
CPU board was damaged due to
noise in the e
nco
der
cabl
e.
Repl
ace the board and im
plement noi
se control
measures.
807
Shutdown rel
ay ER status
The tr
an
si
stor on the power-su
pply boa
rd
(to whi
ch the
power cable i
s
co
nne
cted
) is
damaged.
Repl
ace the board.