YASKAWA DX200 Maintenance Manual page 1143

Alarm Name
Alarm Sub
Number
Code
4924 M-SAF CONTACTOR
UNMATCH
Meaning Cause
Other
The meaning of each sub Connection failure
code is as follows:
CPU1 1:SFRON1
CPU1 2:SFRON2
CPU1 3:SFRON3
CPU1 4:SFRON4
CPU2 1:SFRON1
CPU2 2:SFRON2
CPU2 3:SFRON3
CPU2 4:SFRON4
YSF21 board failure
YSF22 board failure
YPU unit failure
Other
Remedy
If the alarm occurs again, save the CMOS.BIN in maintenance mode,
and then contact your Yaskawa representative about occurrence
status (operating procedure).
(1)Reset the alarm.
(2)If the alarm occurs again, check the connection and inserting state
of the following cables and connectors.
∙
YSF22-CN217
∙
YPU-CN607
∙
Cable continuity between YSF22 board and YPU unit.
(1)Reset the alarm.
(2)If the alarm occurs again, replace the YSF21 board.
(1)Reset the alarm.
(2)If the alarm occurs again, replace the YSF22 board.
In a system where a plurality of YSF22 boards are connected, replace
the board on which the alarm occurred.
(1)Reset the alarm.
(2)If the alarm occurs again, replace the YPU unit.
In a system where a plurality of YPU units are connected, replace the
unit, which is connected to the unit on which the alarm occurred.
If the alarm occurs again, save the CMOS.BIN in maintenance mode,
and then contact your Yaskawa representative about occurrence
status (operating procedure).