YASKAWA DX100 Maintenance Manual page 575

Alarm Alarm Name Sub
Number Code
55
58
59
Meaning Cause
CPU2 detected an inconsistency Connection failure
of speed mode 1 feedback signal
between YSU unit.
YSU Unit or
connection cable
failure
CPU2 detected an inconsistency Connection failure
of error signal between YSU unit.
YSU Unit or
connection cable
failure
CPU2 detected an inconsistency Connection failure
of error feedback ready signal
between YSU unit.
Remedy
(1)Reset the alarm.
(2)If the alarm occurs again, check the followings.
·Wiring confirmation of pin numbers 23, 25, 48, and 50 of YSU unit (CN205
connector) and pin numbers 22, 24, 47, and 49 of YSU unit (CN206
connector)
(1)Reset the alarm.
(2)If the alarm occurs again after confirming the wiring, execute the following
contents. Save the CMOS.BIN before replacing the YSU unit to be safe.
·Replacement of YSU unit
·Replacement of connection cable
(1)Reset the alarm.
(2)If the alarm occurs again, check the followings.
·Connection confirmation of pin No. 1, 2, 14 and 15 wiring of YSU unit and
YSU unit
(1)Reset the alarm.
(2)If the alarm occurs again after confirming the connection, execute the
following contents. Save the CMOS.BIN before replacing the YSU unit to be
safe.
Replacement of YSU unit
replacement of connection cable
(1)Reset the alarm.
(2)If the alarm occurs again, check the followings.
·Connected confirmation of wiring for pin numbers 3, 4, 16, and 17 of YSU
unit (CN207 connector) and YSU unit