YASKAWA HV600 Installation & Startup page 137

Code Name
INTLK BAS Interlock
Note:
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
• If the drive detects this error,
Code Name
L24v Loss of External Power 24 Supply
Note:
• Set o2-23 [External 24V Powerloss Detection] to enable or disable L24v detection.
• The drive will not output an alarm signal for this alarm.
Code Name
LCP Low City Pressure
Note:
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
• If the drive detects this error during run, it coasts to stop and does not operate until the digital input has deactivated for the time set in Y4-22.
Code Name
LOAUX Low PI Aux Feedback Level
Note:
If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
Code Name
LOFB Low Feedback Sensed
Note:
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
• If the drive detects this fault, it will respond as specified by the setting of Y1-10 [Low Feedback Selection].
Code Name
LoG Com Error / Abnormal SD Card
Note:
If the drive detects this error, the terminal set to H2-01 to H2-03 = 6A [MFDO Function Selection = Data Logger Error] will activate.
Code Name
LOP Loss of Prime
Note:
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
• If the drive detects this fault, it will respond as specified by the setting of Y1-22 [Prime Loss Selection].
YASKAWA TOEPYAIH6B01A HV600 AC Drive Narrow Bypass Installation & Startup
Causes
The digital input terminal set to H1-xx = B2 [MFDI
Function Selection = BAS Interlock] deactivates.
will not flash.
Causes
The voltage of the backup 24 V power supply has
decreased. The main circuit power supply is operating
correctly.
Causes
Insufficient pressure is present on the inlet to the
pump in these conditions:
• Y4-24 = 0 [Low City Alarm Text = Low City
Pressure]
• The terminal set for H1-xx = B8 or 1B8 [MFDI
Function Selection = Low City Pressure or !Low
City Pressure] activates
Causes
When the drive operates in AUTO Mode or HAND
Mode, PI Auxiliary Feedback is less than the level set
in YF-09 [PI Aux Control Low Lvl Detection] for the
time set in YF-10 [PI Aux Control Low Lvl Det Time]
and the drive is running.
Causes
The feedback level is less than the level set in Y1-08
[Low Feedback Level] for the time set in Y1-09 [Low
Feedback Lvl Fault Dly Time].
Causes
There is not a micro SD card in the keypad.
• The drive is connected to USB.
• The number of log communication files is more
than 1000.
• The micro SD card does not have available
memory space.
• The line number data in a log communication file
was changed.
• A communication error between the keypad and
drive occurred during a log communication.
Causes
The pump load that measured based on the Y1-18
[Prime Loss Detection Method] setting is less than
the level set in Y1-19 [Prime Loss Level] for the time
set in Y1-20 [Prime Loss Time], and the output
frequency is Y1-21 [Prime Loss Activation Freq] or
more.
5.6 Minor Faults/Alarms
Possible Solutions
Make sure the cause of interlock.
Possible Solutions
• Examine the external 24 V power supply for disconnected wires
and wiring errors and repair the problems.
• Examine the external 24 V power supply for problems.
Possible Solutions
• Examine the pressure switch contact for correct operation.
• Make sure that control wiring to drive terminal strip from
pressure switch contact.
• Make sure that suction pressure is present with an isolated
measuring device.
• Set Y4-22 [Low City On-Delay Time] and Y4-23 [Low City Off-
Delay Time] correctly.
• Deactivate the digital input terminals set to H1-xx = B8 or 1B8.
Possible Solutions
• Increase the PI Auxiliary Feedback level more than YF-09.
• Set YF-09 and YF-10 correctly.
Possible Solutions
• Increase the feedback level to more than Y1-08 + Y1-14 [High
Feedback Hysteresis Level].
• Set Y1-08 and Y1-09 correctly.
Possible Solutions
Put a micro SD card in the keypad.
Set o5-01 = 0 [Log Start/Stop Selection = OFF].
Possible Solutions
• Examine a dry well, air in the system, or no water in the system.
Use preferred priming method suggested by the pump
manufacturer to restart the pump.
• When there is resistance in the pump, allow the system to pump
water again.
• Set Y1-18 to Y1-21 correctly.
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