YASKAWA iQpump Micro CIMR-PW Series, User Manual, Page: 273 / 444

LED Display LCD Display Minor Fault Name
Acceleration and deceleration times are too
short.
• 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.
A special-purpose motor is being used, or the
drive is attempting to run a motor greater than
the maximum allowable capacity.
• Check the motor capacity.
• Use a motor appropriate for the drive. Ensure the motor is within the allowable capacity range.
The current level increased due to Speed
Search after a momentary power loss or while
attempting to perform a fault restart.
The alarm will only appear briefly. There is no need to take action to prevent the alarm from occurring in
such instances.
LED Display LCD Display Minor Fault Name
H 1fb
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.
LED Display LCD Display Minor Fault Name
lop
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.
LED Display LCD Display Minor Fault Name
l c p
Low City
Pressure
Low City Pressure
Cause Possible Solution
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.
• 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.
LED Display LCD Display Minor Fault Name
lofb
Low Feedback
Low FB Sensed
Low Feedback Level Alarm
The feedback signal is too low.
Cause Possible Solutions
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).
• 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.
LED Display LCD Display Minor Fault Name
l5p
Low Suction
Pressure
Low Suction Pressure
Cause Possible Solution
6.4 Alarm Detection
YASKAWA TOEP YAIQPM 03B YASKAWA AC Drive - iQpump Micro User Manual 273
6
Troubleshooting