Yaskawa iQpump1000 AC Drive Quick Start - Manual (Page 267)

HOA Keypad Display Fault Name
Low WL/SP Drive Disabled
Low Water Level / Suction Pressure Disabled
Water Level or Suction Pressure is below the Q4-06/Q5-06 setting.
Cause Possible Solution
Drive is not allowed to run in MEMOBUS
multiplex when P9-51 is set to 1, the Water
Level or Suction Pressure is below the
Q4-06/Q5-06 setting, and the drive is
stopped or running as a lag drive.
• Confirm that the Water Level or Suction Pressure source is installed and working properly.
• Wait for the Water Level or Suction Pressure to recover.
HOA Keypad Display Minor Fault Name
LT-1
Cooling Fan Maintenance Time
The cooling fan has reached its expected maintenance period and may need to be replaced.
Note: An alarm output (H2-oo = 10) will only be triggered if both (H2-oo = 2F and H2-oo =
10) are set.
Cause Possible Solution
The cooling fan has reached 90% of its
expected performance life.
Replace the cooling fan and set o4-03 to 0 to reset the Maintenance Monitor.
HOA Keypad Display Minor Fault Name
LT-2
Capacitor Maintenance Time
The main circuit and control circuit capacitors are nearing the end of their expected performance life.
Note: An alarm output (H2-oo = 10) will only be triggered if H2-oo = 2F.
Cause Possible Solution
The main circuit and control circuit
capacitors have reached 90% of their
expected performance lives.
Replace either the control board or the entire drive. For instructions on replacing the control board, contact
Yaskawa or your nearest sales representative.
HOA Keypad Display Minor Fault Name
LT-3
Soft Charge Bypass Relay Maintenance Time
The DC bus soft charge relay is nearing the end of its expected performance life.
Note: An alarm output (H2-oo = 10) will only be triggered if H2-oo = 2F.
Cause Possible Solution
The DC bus soft charge relay has reached
90% of expected performance life.
Replace either the control board or the entire drive. For instructions on replacing the control board, contact
Yaskawa or your nearest sales representative.
HOA Keypad Display Minor Fault Name
LT-4
IGBT Maintenance Time (50%)
IGBTs have reached 50% of their expected performance life.
Note: An alarm output (H2-oo = 10) will only be triggered if H2-oo = 2F.
Cause Possible Solution
IGBTs have reached 50% of their expected
performance life.
Check the load, carrier frequency, and output frequency.
HOA Keypad Display Minor Fault Name
Main FdBk Lost
Using Backup FB
Main PI Feedback Lost
Cause Possible Solution
Transducer failure Confirm Main PI Feedback transducer is powered and operational.
Wire-break Verify Main PI Feedback transducer connection to the drive.
HOA Keypad Display Minor Fault Name
Net Flow Meter
Lost, Chk Source
Net Flow Meter Loss
There is no drive on the MEMOBUS network with an analog flow meter.
Cause Possible Solution
5.3 Alarm Detection
YASKAWA TOEP YAIP1W 01B YASKAWA AC Drive - iQpump1000 Quick Start Guide 267
5
Troubleshooting