YASKAWA iQpump1000 User Manual page 269

HOA Keypad Display
Internal circuitry is damaged
HOA Keypad Display
Uv3
Cause
The relay or contactor on the soft-charge
bypass circuit is damaged
HOA Keypad Display
Uv4
<1>
Cause
Not enough power is being supplied to the
gate drive board.
<1> Detected in models 4A0930 and 4A1200.
HOA Keypad Display
VLTS
Cause
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
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.
YASKAWA TOEP YAIP1W 01F YASKAWA AC Drive - iQpump1000 User Manual
• Cycle power to the drive. Check if the fault reoccurs.
• If the problem continues, replace either the control board or the entire drive. For instructions on replacing
the control board, contact Yaskawa or a Yaskawa representative.
Undervoltage 3 (Soft-Charge Bypass Circuit Fault)
The soft-charge bypass circuit failed.
• Cycle power to the drive and see if the fault reoccurs.
• If the problem continues, replace either the control board or the entire drive. For instructions on replacing
the control board, contact Yaskawa or a Yaskawa representative.
• Check monitor U4-06 for the performance life of the soft-charge bypass.
• Replace either the control board or the entire drive if U4-06 exceeds 90%. For instructions on replacing
the control board, contact Yaskawa or a Yaskawa representative.
Gate Drive Board Undervoltage
Voltage drop in the gate drive board circuit
• Cycle power to the drive and see if the fault reoccurs.
• If the problem continues, replace either the gate drive board or the entire drive. For instructions on replacing
the gate drive board, contact Yaskawa or a Yaskawa representative.
Volute-Thermostat Fault
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.
Water Level Loss
Repair level sensor or wiring.
Fault Name
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
5.2 Fault Detection
5
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