5.4 Alarm Detection
YASKAWA ELECTRIC
TOEP C710656 10B YASKAWA Power Regenerative Unit - R1000 Instruction Manual
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5.4 Alarm Detection
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Alarm Codes, Causes, and Possible Solutions
Alarms are regenerative unit protection functions that do not necessarily cause the regenerative unit to stop. After
removing the cause of an alarm, the regenerative unit 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-
= 10), that output terminal will be triggered.
Note:
If a multi-function output is set to close when an alarm occurs (H2-
= 10), it will also close when maintenance periods are
reached, triggering alarms LT-1 through LT-4 (triggered only if H2-
= 2F).
Table 5.7 Alarm Codes, Causes, and Possible Solutions
Digital Operator
Display
Minor Fault Name
Detail
Alarm Output
(H2-
= 10)
AEr
Communication Option
Station Number Setting
Error (CC-Link,
CANopen,
MECHATROLINK)
Option card node address is outside of the acceptable setting range.
YES
Cause
Possible Solutions
Station number is set outside the possible
setting range.
Set the station number of the option card correctly.
Digital Operator
Display
Minor Fault Name
Detail
Alarm Output
(H2-
= 10)
Aov
Power Supply
Overvoltage
The input power supply voltage became equal to or higher than the Input
Power Supply Overvoltage Detection Level.
200 V Class: Approximately 277 Vac
400 V Class: Approximately 554 Vac
YES
Cause
Possible Solutions
The input power supply voltage is too high.
Reduce the voltage to within the range in the power supply specifications.
Digital Operator
Display
Minor Fault Name
Detail
Alarm Output
(H2-
= 10)
AUv
Power Supply
Undervoltage
The input power supply voltage became equal to or lower than the Input Power
Supply Undervoltage Detection Level.
200 V Class: Approximately 150 Vac
400 V Class: Approximately 300 Vac
YES
Cause
Possible Solutions
The power supply voltage is low.
Increase the power supply voltage.
A phase loss occurred in the input power
supply.
Check the input power supply for phase loss or an imbalance in the interphase voltages.
Investigate and correct the cause and reset the fault.
Voltage detection failed.
Correctly wire r1/ 11, 1/ 21, and t1/ 31.
Digital Operator
Display
Minor Fault Name
Detail
Alarm Output
(H2-
= 10)
bb
Baseblock
Output interrupted as indicated by an external baseblock signal.
N.A.
Cause
Possible Solutions
External baseblock signal was entered via one
of the multi-function input terminals (S1 to S8).
Check external sequence and baseblock signal input timing.
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