Alarm Detection - YASKAWA A1000 Series Quick Start Manual

5 Troubleshooting

◆ Alarm Detection

■ Alarm Codes, Causes, and Possible Solutions
Alarms are drive protection functions that do not necessarily cause the drive to stop. Once the cause of an alarm is
removed, the drive will return to the same status is was before the alarm occurred.
When an alarm has been triggered, the ALM light on the digital operator display blinks and the alarm code display
flashes. If a multi-function output is set for an alarm (H2-
Note: If a multi-function output is set to close when an alarm occurs (H2-
reached, triggering alarms LT-1 through LT-4 (triggered only if H2-
Digital Operator Display
110
Table 50 Alarm Codes, Causes, and Possible Solutions
Communication Option Station Number Setting Error (CC-Link, CANopen, MECHATROLINK-II)
AEr
Option card node address is outside the acceptable setting range.
Baseblock
bb
Drive output interrupted as indicated by an external baseblock signal.
Braking Transistor Overload Fault
boL
The braking transistor in the drive has been overloaded.
Option Communication Error
bUS
• After initial communication was established, the connection was lost.
• Assign a Run command frequency reference to the option card.
Serial Communication Transmission Error
CALL
Communication has not yet been established.
MEMOBUS/Modbus Communication Error
CE
Control data was not received correctly for two seconds.
CrST
Cannot Reset
Speed Deviation (when using a PG option card)
dEv
The deviation between the speed reference and speed feedback is greater than the setting in F1-10 for
longer than the time in F1-11.
dnE Drive Disabled
Forward/Reverse Run Command Input Error
EF
Both forward run and reverse run closed simultaneously for over 0.5 s.
Option Card External Fault
EF0
An external fault condition is present.
External fault (input terminal S1)
EF1
External fault at multi-function input terminal S1.
External fault (input terminal S2)
EF2
External fault at multi-function input terminal S2.
External fault (input terminal S3)
EF3
External fault at multi-function input terminal S3.
External fault (input terminal S4)
EF4
External fault at multi-function input terminal S4.
External fault (input terminal S5)
EF5
External fault at multi-function input terminal S5.
External fault (input terminal S6)
EF6
External fault at multi-function input terminal S6.
External fault (input terminal S7)
EF7
External fault at multi-function input terminal S7.
External fault (input terminal S8)
EF8
External fault at multi-function input terminal S8.
Excessive PID Feedback
FbH
The PID feedback input is higher than the level set in b5-36 for longer than the time set in b5-37, and
b5-12 is set to 1 or 4.
= 10), that output terminal will be triggered.
= 10), it will also close when maintenance periods are
= 2F).
Minor Fault Name
YASKAWA ELECTRIC TOEP C710616 21C YASKAWA AC Drive - A1000 Quick Start Guide