5.3 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 5.3 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
AnalogFB Lost
Switched to Net
Analog Feedback Lost
Analog feedback has not been detected and the network PI feedback signal is now used.
Cause Possible Solution
Defective or broken analog input source.
Confirm that the PI feedback source is installed and working properly. If there is no feedback source, set
P9-02 to 3 so the drive will read the network PI feedback from another drive.
H3-0o is not set to B (PI Feedback)
Set H3-0o to B if the analog input source is to be used for PI feedback.
Set P9-02 to 3 if the drive does not have an analog PI feedback source.
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 Fault Name
AUXFB
PI Aux Lvl Loss
Wire-break detection for PI Aux Feedback Level
Cause Possible Solution
The analog input programmed for “PI Aux
FB Level” (H3-oo = 27) has dropped
below 3 mA or risen above 21 mA for
longer than 1 second.
Repair transducer or wiring.
HOA Keypad Display Minor Fault Name
Backup FdBk Lost
Check/Replace
Backup Feedback Device (H3-oo = 24) lost.
Cause Possible Solution
5.3 Alarm Detection
270
YASKAWA TOEP YAIP1W 01F YASKAWA AC Drive - iQpump1000 User Manual
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