Cause
Possible Solution
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).
• 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.
HOA Keypad Display
Fault Name
HIFLO
High Flow
High Flow
The meter has detected a high flow condition.
Cause
Possible Solution
The flow is too high
Reduce the flow
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).
• 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.
HOA Keypad Display
Fault Name
HISUC
High Suction
High Section Pressure
Cause
Possible Solution
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).
• 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.
HOA Keypad Display
Fault Name
HWL
High Water Level
The “High Water Level” digital input is active (H1-0
o
= 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.
HOA Keypad 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.
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 control board or the entire drive. Contact Yaskawa or a Yaskawa
representative for instructions on replacing the control board.
A single-phase motor is being used
The drive cannot operate a single phase motor.
HOA Keypad Display
Fault Name
LFB
Low Feedback
The feedback signal is too low.
Cause
Possible Solution
5.2 Fault Detection
180
YASKAWA
TOEP YAIP1W 01A YASKAWA AC Drive - iQpump1000 Quick Start Guide
Summary of Contents for iQpump1000
Page 355: ......
