YASKAWA iQpump Micro CIMR-PW Series User Manual page 273

LED Display LCD Display
Acceleration and deceleration times are too
short.
A special-purpose motor is being used, or the
drive is attempting to run a motor greater than
the maximum allowable capacity.
The current level increased due to Speed
Search after a momentary power loss or while
attempting to perform a fault restart.
LED Display LCD Display
High Feedback
H1fb
High FB Sensed
Cause
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).
LED Display LCD Display
lop
Cause
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).
LED Display LCD Display
Low City
lcp
Pressure
Cause
Insufficient pressure is present on the inlet to
the pump.
Shown when P4-24 = 0 and when the digital
input has been active (closed for P4-21 = 0,
or open for P4-21 = 1) for the time set in
P4-22.
LED Display LCD Display
Low Feedback
lofb
Low FB Sensed
Cause
The feedback level has dropped below the
level set in P1-08, Low Feedback Level
This is only effective when P1-10, Low
Feedback Selection, is set to 1 (Alarm and
digital out).
LED Display LCD Display
Low Suction
l5p
Pressure
Cause
YASKAWA TOEP YAIQPM 03B YASKAWA AC Drive - iQpump Micro User Manual
• Calculate the torque required during acceleration and for the inertia moment.
• If the torque level is not right for the load, take the following steps:
• Increase the acceleration and deceleration times (C1-01 through C1-04).
• Increase the capacity of the drive.
• Check the motor capacity.
• Use a motor appropriate for the drive. Ensure the motor is within the allowable capacity range.
The alarm will only appear briefly. There is no need to take action to prevent the alarm from occurring in
such instances.
High Feedback Level Alarm
The feedback signal is too high.
• 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.
Loss of Prime
LOP
The pump has lost its prime and P1-22 is set to 1.
• 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.
Low City Pressure
• Check pressure switch contact for correct operation.
• Check control wiring to drive terminal strip from pressure switch contact.
• Check to make sure that suction pressure is present by means of a separate measuring device.
Low Feedback Level Alarm
The feedback signal is too low.
• Increase the feedback signal.
• Set the Low Feedback alarm characteristics in P1-08 and P1-09.
• Drive response to this condition is controlled by P1-10, Low Feedback Selection.
Low Suction Pressure
Minor Fault Name
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solution
6.4 Alarm Detection
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