Yaskawa iQpump Micro - Manual (Page 184)

Digital Operator Display Minor Fault Name
HbbF
Safe Disable Signal Input
The safe disable input hardware is defective.
Cause Possible Solutions
One of the Safe Disable channels is faulty. Replace the drive.
Digital Operator Display Minor Fault Name
Feedback Loss Go To Freq. b5-13
(FLGT)
PID Feedback Loss
The drive will run at the speed set in b5-13, Feedback Loss Goto Frequency.
Cause Possible Solutions
PID feedback source is incorrectly installed
or is not working. Effective only when
b5-12 is set to 3 (Run at b5-13).
• 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.
Digital Operator Display Minor Fault Name
Feedback Loss Wire Break
(FDB-L)
PID Feedback Loss
The analog input programmed for PID feedback has gone above 21 mA or fallen below 3 mA.
Cause Possible Solutions
PID 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.
Digital Operator Display Minor Fault Name
Freq. Ref Pump Min (P1-06)
(PFREF)
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 PID Mode
• Minimum Pump Frequency is enabled
(P1-06 > 0.00)
Increase the frequency reference to a value greater than P1-06.
Digital Operator Display Minor Fault Name
Freq. Ref Thrust (P4-12)
(PTHRT)
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 PID Mode
• Thrust bearing is enabled (P4-12 > 0.00)
Increase the frequency reference to a value greater than P4-12.
Digital Operator 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.
5.3 Alarm Detection
184 YASKAWA TOEP YAIQPM 03B YASKAWA AC Drive - iQpump Micro User Manual