Fault Detection - YASKAWA U1000 iQpump MATRIX Drive User Manual

5.3

Fault Detection

u
Fault Displays, Causes, and Possible Solutions
Faults are detected for drive protection, and cause the drive to stop while triggering the fault output terminal MA-MB-MC.
Remove the cause of the fault and manually clear the fault before attempting to run the drive again.
HOA Keypad Display
ACCUM
Accum Level
Cause
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 2 (fault with manual
monitor reset) or 3 (fault with automatic
monitor reset.
HOA Keypad Display
AJF
Anti-Jam Fault
Cause
The drive was not able to clear debris from
the impeller in fewer than the number of
attempts set in P7-02. This is only effective
when P7-01, Anti-jam Operation is set to 1
(enabled).
HOA Keypad Display
Aov
Cause
• The power supply voltage exceeded the
range listed in drive input power
specifications.
• Regenerative operation was performed
when the power supply capacity was too
small.
• The power supply circuit opened during
regeneration.
HOA Keypad Display
AUv
Cause
The capacity of the power supply is too
small.
The distortion in the power supply is too
large.
A phase loss occurred in the input power
supply.
The built-in fuse is open.
YASKAWA TOEPYAIUPW01A YASKAWA AC Drive - U1000 iQpump Matrix Drive User Manual
Table 5.4 Detailed Fault Displays, Causes, and Possible Solutions
Accumulated Level Fault
The total volume of water flow measured over time by the flow meter has exceeded the fault level setting.
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.
Anti-Jam Fault
• Check for proper pump operation. Remove debris from the pump impeller.
• 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.
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 Vrms
400 V Class: Approximately 630 Vrms
• Reduce the voltage to within the range in the power supply specifications.
• Increase the capacity of the power supply.
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
Increase the capacity of the power supply.
Lower the impedance of the input power supply wiring.
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.
An internal transistor was destroyed. The input wiring is grounded or short circuited.
The output transistor has failed because the drive output has grounded or short circuited.
Replace the board or the drive. For instructions on replacing the control board, contact Yaskawa or your
nearest sales representative.
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
5.3 Fault Detection
5
181