HOA Keypad Display
Minor Fault Name
The suction pressure has fallen below the
level set in Q5-09 for longer than the time
set in Q5-10. This is only effective when
Q5-11, Low Suction Pressure Behavior
Select is set to 1 (alarm).
• Increase the system pressure.
• Set the Low Suction alarm characteristics in Q5-09, Q5-10, and Q5-18. Q5-10 Detection Delay Time only
applies if Q5-01 = 2.
• Drive response to this condition is controlled by Q5-11, Low Suction Pressure Behavior Select.
HOA Keypad Display
Minor Fault Name
Low City Pressure
Low City Pressure
Cause
Possible Solution
Insufficient pressure is present on the inlet
to the pump.
Shown when P4-24 = 0 and when the digital
input has been active (closed for P4-21 = 0,
or open for P4-21 = 1) for the time set in
P4-22.
• Check pressure switch contact for correct operation.
• Check control wiring to drive terminal strip from pressure switch contact.
• Check to make sure that suction pressure is present by means of a separate measuring device.
HOA Keypad Display
Minor Fault Name
Low Feedback Low FB Sensed
Low Feedback Level Alarm
The feedback signal is too low.
Cause
Possible Solutions
The feedback level has dropped below the
level set in P1-08, Low Feedback Level
This is only effective when P1-10, Low
Feedback Selection, is set to 1 (Alarm and
digital out).
• Increase the feedback signal.
• Set the Low Feedback alarm characteristics in P1-08 and P1-09.
• Drive response to this condition is controlled by P1-10, Low Feedback Selection.
HOA Keypad Display
Minor Fault Name
Low Suction Pressure
Low Suction Pressure
Cause
Possible Solution
Insufficient suction pressure is present.
Shown when P4-24 = 1 and when the digital
input has been active (closed for P4-21 = 0,
or open for P4-21 = 1) for the time set in
P4-22.
• Check pressure switch contact for correct operation.
• Check control wiring to drive terminal strip from pressure switch contact.
• Check to make sure that suction pressure is present by means of a separate measuring device.
Note:
The following possible solutions apply to drive software versions PRG: 8551 and earlier.
• Increase the system pressure.
• Set the Low Suction alarm characteristics in Q5-09 and Q5-18.
• Drive response to this condition is controlled by Q5-11, Low Suction Pressure Behavior Select.
HOA Keypad Display
Minor Fault Name
Low Water in Tank
Low Water in Tank
Cause
Possible Solution
Insufficient pressure is present on the inlet
to the pump.
Shown when P4-24 = 2 and when the digital
input has been active (closed for P4-21 = 0,
or open for P4-21 = 1) for the time set in
P4-22.
• Check pressure switch contact for correct operation.
• Check control wiring to drive terminal strip from pressure switch contact.
• Check to make sure that suction pressure is present by means of a separate measuring device.
• Raise the water level.
• Set the Low Water Level alarm characteristics in Q4-09.
• Drive response to this condition is controlled by Q4-11, Low Level Behavior.
HOA Keypad Display
Fault Name
Low WL/SP/PI-Aux Drive Disabled
Low Water Level / Suction Pressure / Aux PI Feedback Disabled
Water Level or Suction Pressure is below the Q4-06/Q5-06/Q6-06 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/Q6-06 setting, and the drive
is stopped or running as a lag drive.
• Confirm that the Water Level, Suction Pressure, or Aux PI Feedback source is installed and working
properly.
• Wait for the WL/SP/PIAuxFB to recover.
5.3 Alarm Detection
YASKAWA TOEP YAIP1W 01F YASKAWA AC Drive - iQpump1000 User Manual
277
5
Troubleshooting
Содержание iQpump1000
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