YASKAWA iQpump1000 Quick Start Manual page 192

5.2 Fault Detection
The digital input assigned to the volute/
thermostat input (H1-0o = 88 or 89) is
active.
Both volute/thermostat inputs are
programmed simultaneously (H1-0o = 88
and 89).
HOA Keypad Display
voF
Cause
Hardware is damaged. Internal drive
module MC / FAN overheat protection
circuit board is due to abnormal ambient
operating power.
HOA Keypad Display
vToL
Cause
The output current of the drive has been
elevated for a set length of time.
HOA Keypad Display
WLL
Water Level Loss
Cause
An analog input programmed for setting 23
"WaterLvl/Suction" has dropped below 3
mA or risen above 21 mA for longer than 1
second.
192
Check the wiring or wait for the volute or motor to cool.
• 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.
Output Voltage Detection Fault
Problem detected with the voltage on the output side of the drive.
• Lower ambient temperature.
• Replace the control board or the entire drive. For instructions on replacing the control board, contact
Yaskawa or a Yaskawa representative.
VT Overload
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
Water Level Loss
Repair level sensor or wiring.
YASKAWA TOEP YAIP1W 01A YASKAWA AC Drive - iQpump1000 Quick Start Guide
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution