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5.4 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 HOA keypad 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-4 (triggered only if H2-
oo
= 2F).
Table 5.5 Alarm Codes, Causes, and Possible Solutions
HOA Keypad Display
Minor Fault Name
ACCUM
Accum Level
Accumulated Level Error
The total volume of water flow measured over time by the flow meter has exceeded the fault level setting.
Cause
Possible Solution
The accumulated level has exceeded the
values set in P6-11 to P6-14. This is only
effective when P6-15, Accumulated
Behavior is set to 1 (alarm).
Set the Accumulated Level fault characteristics in P6-11 to P6-14 and P6-16.
Drive response to this condition is controlled by P6-15, Accumulated Behavior.
Auto-restart of this fault is controlled by P6-15, Accumulated Behavior and P6-05, Flow Accumulation Reset.
HOA Keypad Display
Minor Fault Name
Accum Lvl Reached
Cycle Run Cmd
Flow Accumulation level reached
Cause
Possible Solution
Accum Behavior P6-15 is set to 5 (Stop,
Alarm, & Reset) and the Accumulated
Level has been reached.
Cycle the Run command.
HOA Keypad 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.
HOA Keypad Display
Minor Fault Name
Anti-Jam Active
Anti-Jam Alarm
Cause
Possible Solution
The drive was not able to clear debris from
the impeller in fewer than the attempts set
in P7-02. This is only effective when P7-01,
Anti-jam Operation is set to 1 (enabled).
• Check for proper pump operation.
• Set the Anti-jam fault characteristics in P7-02 to P7-08.
• Drive response to this condition is controlled by P7-01, Anti-jam Operation Selection.
HOA Keypad 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.
HOA Keypad Display
Minor Fault Name
AUXFB
PI Aux Lvl Loss
Wire-break detection for PI Aux Feedback Level
Cause
Possible Solution
5.4 Alarm Detection
198
YASKAWA TOEPYAIUPW01A YASKAWA AC Drive - U1000 iQpump Matrix Drive User Manual