YASKAWA iQpump1000 - Page 192

The digital input assigned to the volute/
thermostat input (H1-0o = 88 or 89) is
active.
Check the wiring or wait for the volute or motor to cool.
Both volute/thermostat inputs are
programmed simultaneously (H1-0o = 88
and 89).
•
Program only one digital input to either H1-0o = 88 or H1-0o = 89.
• Auto-restart of this fault is controlled by parameter L5-53, Volute-TStat Retry Selection.
HOA Keypad Display Fault Name
voF
Output Voltage Detection Fault
Problem detected with the voltage on the output side of the drive.
Cause Possible Solution
Hardware is damaged. Internal drive
module MC / FAN overheat protection
circuit board is due to abnormal ambient
operating power.
• Lower ambient temperature.
• Replace the control board or the entire drive. For instructions on replacing the control board, contact
Yaskawa or a Yaskawa representative.
HOA Keypad Display Fault Name
vToL VT Overload
Cause Possible Solution
The output current of the drive has been
elevated for a set length of time.
The application may not be suited for the drive
• The application may not be suited for the drive
• The drive is undersized for the load
HOA Keypad Display Fault Name
WLL
Water Level Loss
Water Level Loss
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 level sensor or wiring.
5.2 Fault Detection
192
YASKAWA TOEP YAIP1W 01A YASKAWA AC Drive - iQpump1000 Quick Start Guide