YASKAWA iQpump1000 - Page 276

HOA Keypad Display Fault Name
PI Aux Feedback has risen above the Q6-12
level for longer than the time set in Q6-13
and the drive is running inAUTO, and
output frequency is greater than zero.
• Lower the PI Aux Feedback level
• Adjust parameters Q6-12 and Q6-13.
HOA Keypad Display Minor Fault Name
HIFLO
High Flow
High Flow Error
The meter has detected a high flow condition.
Cause Possible Solution
The flow is too high Reduce the flow
The measured water flow has risen above
the P6-17 level for the time set in P6-18.
This is only effective when P6-19, High
Flow Select is set to 1 (alarm).
• Set the High Flow fault characteristics in P6-17 and P6-18.
• Drive response to this condition is controlled by P6-19, High Flow Select.
• Auto-restart of this fault is controlled by P6-19, High Flow Select.
HOA Keypad Display Minor Fault Name
High Feedback High FB Sensed
High Feedback Level Alarm
The feedback signal is too high.
Cause Possible Solutions
The feedback level has risen above the level
set in P1-11, High Feedback Level
This is only effective when P1-13, High
Feedback Selection, is set to 1 (Alarm and
digital out).
• Decrease the feedback signal.
• Set the High Feedback alarm characteristics in P1-11 and P-12.
• Drive response to this condition is controlled by P1-13, High Feedback Selection.
HOA Keypad Display Minor Fault Name
HISUC
High Suction
High Section Pressure
Cause Possible Solution
The suction pressure has risen above the
level set in Q5-12. This is only effective
when Q5-14, High Suction Pressure
Behavior Select is set to 1 (alarm).
• Reduce the system pressure.
• Set the High Suction Pressure alarm characteristics in Q5-12.
• Drive response to this condition is controlled by Q5-14, High Suction Pressure Behavior Select.
• Auto-restart of this fault is controlled by Q5-14, High Suction Pressure Behavior Select and Q5-15, Suction
Pressure Auto-restart Time.
HOA Keypad Display Fault Name
LOAUX
Low PI Aux Lvl
Low PI Auxiliary Feedback Level
Cause Possible Solution
PI Aux Feedback has fallen below the
Q6-09 level for longer than the time set in
Q6-10 and the drive is running in HAND or
AUTO.
• Raise the PI Aux Feedback level
• Adjust parameters Q6-09 and Q6-10.
HOA Keypad Display Minor Fault Name
LOP
Loss of Prime
The pump has lost its prime and P1-22 is set to 1.
Cause Possible Solution
The measured quantity of water has
dropped below the level set in P1-19, Prime
Loss Level, for the time set in P1-20, Loss
of Prime Time, and the output frequency
has risen above P1-21, Prime Loss
Frequency. This could be due to a dry well,
air in the system, or no water in the system.
This is effective only when P1-22 Loss of
Prime Selection is set to 1 (alarm).
• If there is resistance in the pump, allow the system to pump water again.
• Set the Loss of Prime alarm characteristics in P1-18, P1-19, P1-20, and P1-21.
• Drive response to this condition is controlled by P1-21, Loss of Prime Selection.
HOA Keypad Display Minor Fault Name
LOSUC
Low Suction
Low Section Pressure
Cause Possible Solution
5.3 Alarm Detection
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YASKAWA TOEP YAIP1W 01F YASKAWA AC Drive - iQpump1000 User Manual