Yaskawa iQpump Micro User Manual
Page 170
Digital Operator Display
Fault Name
The feedback signal has risen above the
level set in P1-11, High Feedback Level,
for the time set in P1-12, High Feedback
Level Fault Delay Time.
This is effective only when P1-13, High
Feedback Selection, is set to 0 (Fault and
digital out).
• Set the High Feedback fault characteristics in P1-11 and P1-12.
• Drive response to this condition is controlled by P1-13, High Feedback Selection. Auto-restart of this fault
is controlled by L5-41, High Feedback Fault Retry Selection.
Digital Operator Display
Fault Name
HWL
(HIH20)
High Water Level
The “High Water Level” digital input is active (H1-0o = 90).
Cause
Possible Solution
The Low Water Level switch is activated or
P1-31, High Water Digital Input
Configuration, is programmed incorrectly.
Lower the water level and/or adjust the High Water Level switch.
Digital Operator Display
Fault Name
LF
Output Phase Loss
• Phase loss on the output side of the drive.
• Setting L8-07 to 1 or 2 enables Phase Loss Detection.
Cause
Possible Solution
The output cable is disconnected
• Check for wiring errors and properly connect the output cable.
• Correct the wiring.
The motor winding is damaged
• Check the resistance between motor lines.
• Replace the motor if the winding is damaged.
The output terminal is loose
• Apply the tightening torque specified in this manual to fasten the terminals.
for details.
The rated current of the motor being used
is less than 5% of the drive rated current
Check the drive and motor capacities.
An output transistor is damaged
If the problem continues, replace the drive.
A single-phase motor is being used
The drive cannot operate a single phase motor.
Digital Operator Display
Fault Name
LF2
Output current imbalance
One or more of the phases in the output current is lost.
Cause
Possible Solution
Phase loss has occurred on the output side
of the drive.
• Check for faulty wiring or poor connections on the output side of the drive.
• Correct the wiring.
Terminal wires on the output side of the
drive are loose.
Apply the tightening torque specified in this manual to fasten the terminals.
for details.
No signal displays from the gate driver
board.
Replace the drive. Contact Yaskawa for assistance.
Motor impedance or motor phases are
uneven.
• Measure the line-to-line resistance for each motor phase. Ensure all values are the same.
• Replace the motor. Contact Yaskawa for assistance.
Digital Operator Display
Fault Name
LFB
Low Feedback
The feedback signal is too low.
Cause
Possible Solution
The feedback signal has dropped below the
level set in P1-08, Low Feedback Level, for
the time set in P1-09, Low Feedback Level
Fault Delay Time.
This is effective only when P1-10, Low
Feedback Selection, is set to 0 (Fault and
digital out).
• Set the Low Feedback fault characteristics in P1-08 and P1-09.
• Drive response to this condition is controlled by P1-10, Low Feedback Selection.
• Auto-restart of this fault is controlled by L5-40, Low Feedback Fault Retry Selection.
5.2 Fault Detection
170
YASKAWA TOEP YAIQPM 03B YASKAWA AC Drive - iQpump Micro User Manual