YASKAWA iQpump1000 User Manual page 283

HOA Keypad Display
Cause
Parameter settings are not appropriate for
the load
There is a fault on the machine side
HOA Keypad Display
UL6
Cause
The output current has fallen below the
motor underload curve defined in L6-14 for
longer than the time set to L6-03
HOA Keypad Display
Uv
Cause
Phase loss in the drive input power.
Loose wiring in the drive input power
terminals.
There is a problem with the drive input
power voltage.
Drive internal circuitry is worn.
The drive input power transformer is too
small and voltage drops when the power is
switched on.
Air inside the drive is too hot.
The CHARGE light is broken or
disconnected.
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
Check L6-05 and L6-06 settings
Check the load for any problems.
Motor Underload
The load has fallen below the underload curve defined in L6-14.
Adjust the value set to L6-14 so that output current remains above the motor underload curve during normal
operation.
Undervoltage
One of the following conditions was true when the drive was stopped and a Run command was entered:
• DC bus voltage dropped below the level specified in L2-05.
• Contactor to suppress inrush current in the drive was opened.
• Low voltage in the control drive input power. This alarm outputs only if L2-01 is not 0 and DC bus voltage
is under L2-05.
Check for wiring errors in the main circuit drive input power. Correct the wiring.
• Ensure the terminals have been properly tightened.
• Apply the tightening torque to the terminals as specified.
Tightening Torques on page
• Check the voltage.
• Lower the voltage of the drive input power so that it is within the limits listed in the specifications.
• Check the maintenance time for the capacitors (U4-05).
• Replace either the control board or the entire drive if U4-05 exceeds 90%. For instructions on replacing
the control board, contact Yaskawa or your nearest sales representative.
• Check for an alarm when the magnetic contactor, line breaker, and leakage breaker are closed.
• Check the capacity of the drive input power transformer.
Check the temperature inside the drive.
Replace either the control board or the entire drive. For instructions on replacing the control board, contact
Yaskawa or your nearest sales representative.
Output Voltage Detection Error
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.
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solution
Refer to Main Circuit Wire Gauges and
110.
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solution
5.3 Alarm Detection
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