YASKAWA DX100 Maintenance Manual page 582

Alarm Alarm Name Sub
Number Code
55
57
Meaning Cause
CPU2 detected no change of the Connection failure
feedback signal within a certain
time period in speed mode 1 signal
between YSU units.
Rotary switch setting
error
YSU unit failure
CPU2 detected no change of the Connection failure
feedback signal within a certain
time period in category 1 stop
signal between YSU units.
Rotary switch setting
error
YSU unit failure
Remedy
(1)Reset the alarm.
(2)If the alarm occurs again, check the followings.
·Connector connection confirmation of YSU unit (CN205/CN206)
(1)Reset the alarm.
(2)If the alarm occurs again after confirming the connection, execute the
following contents.
·Set rotary switch (S1) settings of the master control YSU unit to "1"; set
rotary switch (S1) settings of slave control YSU unit to "2".
(1)Reset the alarm.
(2)If the alarm occurs again after confirming the confirming the rotary switch,
replace the YSU unit. Save the CMOS.BIN before replacing the YSU unit to
be safe.
(1)Reset the alarm.
(2)If the alarm occurs again, check the followings.
·Connector connection confirmation of YSU unit (CN205/CN206)
(1)Reset the alarm.
(2)If the alarm occurs again after confirming the connection, execute the
following contents.
·Set rotary switch (S1) settings of the master control YSU unit to "1"; set
rotary switch (S1) settings of slave control YSU unit to "2".
(1)Reset the alarm.
(2)If the alarm occurs again after confirming the confirming the rotary switch,
replace the YSU unit. Save the CMOS.BIN before replacing the YSU unit to
be safe.