6.5 Alarm Detection
u
Alarm Codes, Causes, and Possible Solutions
Alarms are drive protection functions that do not necessarily cause the drive to stop. After removing the cause of an alarm,
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-
oo
= 10), that output terminal will be triggered.
Note:
If a multi-function output is set to close when an alarm occurs (H2-
oo
= 10), it will also close when maintenance periods are reached,
triggering alarms LT-1 through LT-3 (triggered only if H2-
oo
= 2F).
Table 6.15 Alarm Codes, Causes, and Possible Solutions
Digital Operator Display
Minor Fault Name
AEr
Station Address Setting Error (CC-Link, CANopen, MECHATROLINK)
Option card node address is outside of the acceptable setting range.
Cause
Possible Solutions
Station number is set outside the possible
setting range.
• Set parameter F6-10 to the proper value when using a CC-Link option.
• Set parameter F6-35 to the proper value when using a CANopen option.
Digital Operator Display
Minor Fault Name
AUv
Power Supply Undervoltage
The input power supply voltage became equal to or lower than the Input Power Supply Undervoltage
Detection Level (L2-21).
200 V Class: Approximately 150 Vrms
400 V Class: Approximately 300 Vrms
Cause
Possible Solution
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 then reset the fault.
Voltage detection failed.
Correctly wire r1/ l11, s1/ l21, and t1/ l31.
Digital Operator Display
Minor Fault Name
bb
Baseblock
Drive output interrupted as indicated by an external baseblock signal.
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.
Note:
Baseblock alarm “bb” will not activate a digital output programmed for minor fault
H2-0
o
= 10. Set H2-0
o
= 8 or 1B to activate a digital output for “bb”.
Digital Operator Display
Minor Fault Name
bUS
Option Communication Error
• The connection was lost after initial communication was established.
• Assign a Run command frequency reference to the option.
Cause
Possible Solutions
Connection is broken or master controller
stopped communicating.
• Check for faulty wiring.
• Correct the wiring.
• Check for disconnected cables and short circuits. Repair as needed.
Option is damaged.
If there are no problems with the wiring and the fault continues to occur, replace the option.
The option is not properly connected to the
drive.
• The connector pins on the option are not properly lined up with the connector pins on the drive.
• Reinstall the option.
6.5 Alarm Detection
384
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
Summary of Contents for U1000 iQpump Drive
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