YASKAWA iQpump1000 - Page 189

HOA Keypad Display Fault Name
SC IGBT Short Circuit or Ground Fault
Cause Possible Solution
IGBT fault • Check motor wiring.
• Turn off the power supply, then turn it on. If the problem continues, contact your Yaskawa representative
or the nearest Yaskawa sales office.
IGBT short circuit detection circuit fault
The drive is damaged
• Check the drive output side short circuit for a broken output transistor
B1 and U/T1, V/T2, W/T3
– and U/T1, V/T2, W/T3
• Contact your Yaskawa representative or nearest Yaskawa sales office.
HOA Keypad Display Fault Name
SEr
Too Many Speed Search Restarts
The number of Speed Search restarts exceeded the value set to b3-19.
Cause Possible Solution
Parameters related to Speed Search are set
to the wrong values
• Reduce the detection compensation gain during Speed Search (b3-10).
• Increase the current level when attempting Speed Search (b3-17).
• Increase the detection time during Speed Search (b3-18).
• Repeat Auto-Tuning.
The motor is coasting in the opposite
direction of the Run command
Set b3-14 to 1 to enable Bi-Directional Speed Search.
HOA Keypad Display Fault Name
Single Phase Foldback
Single Phase Foldback
Output speed is being limited due to excessive DC Bus voltage ripple.
Cause Possible Solution
An input phase has been lost.
In single phase applications, excess load is
being drawn by the motor.
Reduce the output load.
HOA Keypad Display Fault Name
SPL
Suction Pressure Loss
Suction Pressure Loss
Wire-break detection for suction pressure.
Cause Possible Solution
An analog input programmed for setting 23
“WaterLvl/Suction” has dropped below 3
mA or risen above 21 mA for longer than 1
second.
Repair pressure sensor or wiring.
HOA Keypad Display Fault Name
TdE Time Data Error
Cause Possible Solution
An error has occurred in the Real-Clock
Time function of the HOA keypad.
Replace the HOA keypad. For instructions on replacing the HOA keypad, contact Yaskawa or your nearest
sales representative.
HOA Keypad Display Fault Name
TIE Time Interval Error
Cause Possible Solution
An error has occurred in the Real-Clock
Time function of the HOA keypad.
Replace the HOA keypad. For instructions on replacing the HOA keypad, contact Yaskawa or your nearest
sales representative.
HOA Keypad Display Fault Name
TIM Time Not Set
Cause Possible Solution
5.2 Fault Detection
YASKAWA TOEP YAIP1W 01A YASKAWA AC Drive - iQpump1000 Quick Start Guide
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Troubleshooting