YASKAWA iQpump1000 - Page 275

HOA Keypad Display Minor Fault Name
PI feedback source is incorrectly installed
or is not working. This is effective only
when b5-12 Feedback Loss 4 to 20 mA
Detection Selection is set to 1 (alarm).
• Confirm that the PID feedback source is installed and working properly.
• Drive response to this condition is controlled by b5-12, Feedback Loss 4 to 20 mA Detection Selection,
and b5-13, Feedback Loss Go To Frequency.
• Auto-restart of this fault is controlled by L5-42, Feedback Loss Fault Retry Selection.
HOA Keypad Display Minor Fault Name
Freq. Ref Pump Min (P1-06)
Minimum Pump Frequency Reference
Drive frequency reference is set lower than P1-06, Minimum Pump Frequency.
Cause Possible Solutions
The frequency reference is set lower than
P1-06. The frequency reference is
internally set to the P1-06 value during this
time.
This will only be active when the following
conditions are true:
• Drive is NOT in PI Mode
• Minimum Pump Frequency is enabled
(P1-06 > 0.00)
Increase the frequency reference to a value greater than P1-06.
HOA Keypad Display Minor Fault Name
Freq. Ref Thrust (P4-12)
Thrust Frequency Reference
The fixed frequency reference is set to a value lower than the P4-12, Thrust Frequency, setting.
Cause Possible Solutions
The frequency reference is set lower than
P4-12. The frequency reference is
internally set to the P4-12 value during this
time.
This will only be active when the following
conditions are true:
• Drive is NOT in PI Mode
• Thrust bearing is enabled (P4-12 > 0.00)
Increase the frequency reference to a value greater than P4-12.
HOA Keypad Display Minor Fault Name
Geo Params
Chk Q2-05 to Q2-08
Geothermal Mode Parameters
The drive is running at the level set in Q2-03 due to an incorrect setting.
Cause Possible Solutions
The temperature parameter values are set
incorrectly.
Set the temperature parameters in the following order:
Q2-08 > Q2-07 > Q2-06 > Q2-05
HOA Keypad Display Minor Fault Name
HCA
Current Alarm
Drive current exceeded overcurrent warning level (150% of the rated current).
Cause Possible Solutions
Load is too heavy. Reduce the load for applications with repetitive operations (i.e., stops and starts), or replace the drive.
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.
HOA Keypad Display Fault Name
HIAUX
High PI Aux Lvl
High PI Auxiliary Feedback Level
Cause Possible Solution
5.3 Alarm Detection
YASKAWA TOEP YAIP1W 01F YASKAWA AC Drive - iQpump1000 User Manual
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Troubleshooting