YASKAWA iQpump1000 Quick Start Manual page 180

5.2 Fault Detection
Cause
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 outt).
HOA Keypad Display
HIFLO
High Flow
Cause
The flow is too high
The measured water flow has risen above
the P6-17 level for the time set in P6-18.
This is only effective when P1-19, High
Flow Select is set to 2 (fault).
HOA Keypad Display
HISUC
High Suction
Cause
The suction pressure has fallen below the
level set in Q5-12 for longer than the time
set in Q5-13. This is only effective when
Q5-14, High Suction Pressure Behavior
Select is set to 2 (fault).
HOA Keypad Display
HWL
Cause
The Low Water Level switch is activated or
P1-31, High Water Digital Input
Configuration, is programmed incorrectly.
HOA Keypad Display
LF
Cause
The output cable is disconnected
The motor winding is damaged
The output terminal is loose
The rated current of the motor being used
is less than 5% of the drive rated current
An output transistor is damaged
A single-phase motor is being used
HOA Keypad Display
LFB
Cause
180
• 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.
High Flow
The meter has detected a high flow condition.
Reduce the flow
• Set the High Flow fault characteristics in P6-17 and P6-18.
• Drive response to this condition is controlled by P1-19, High Flow Select.
• Auto-restart of this fault is controlled by P1-19, High Flow Select.
High Section Pressure
• Reduce the system pressure.
• Set the High Suction Pressure fault characteristics in Q5-12, Q5-13, and Q5-18.
• Drive response to this condition is controlled by Q5-14, High Suction Pressure Behavior Select.
• Auto-restart of this fault is controlled by Q5-14, High Suction Pressure Behavior Select and Q5-15, Suction
Pressure Auto-restart Time.
High Water Level
The "High Water Level" digital input is active (H1-0o = 90).
Lower the water level and/or adjust the High Water Level switch.
Output Phase Loss
• Phase loss on the output side of the drive.
• Setting L8-07 to 1 or 2 enables Phase Loss Detection.
• Check for wiring errors and properly connect the output cable.
• Correct the wiring.
• Check the resistance between motor lines.
• Replace the motor if the winding is damaged.
• Apply the tightening torque specified in this manual to fasten the terminals.
Tightening Torque on page 87
Check the drive and motor capacities.
If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a Yaskawa
representative for instructions on replacing the control board.
The drive cannot operate a single phase motor.
Low Feedback
The feedback signal is too low.
YASKAWA TOEP YAIP1W 01A YASKAWA AC Drive - iQpump1000 Quick Start Guide
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
for details.
Fault Name
Possible Solution
Refer to Wire Gauges and