6.6 Minor Faults/Alarms
496 YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
6.6 Minor Faults/Alarms
This section gives information about the causes and possible solutions when a minor fault or alarm occurs. Use the
information in this table to remove the cause of the minor fault or alarm.
Code Name Causes Possible Solutions
AFBL Analog Fbk Lost, Switched to Net
The analog input source is defective or broken. Make sure that you install the PID Feedback source and it operates
correctly.
The parameter setting is H3-xx ≠B [MFAI Function
Selection ≠PID Feedback].
Set H3-xx = B to use the analog input source for PID Feedback.
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 Causes Possible Solutions
AuDis Low PI Aux Fdbk Drive Disabled
• PI Auxiliary Feedback is less than the YF-06 [PI
Aux Control Wake-up Level] setting, and the drive
is stopped or running as a Lag drive.
• Make sure that the YF-06 setting is correct.
• Wait for the PI Auxiliary Feedback to recover.
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 Causes Possible Solutions
AL02 Interlock Open
The digital input set to interlock is open
Make sure that the damper is functioning correctly. The damper
could be opening and the switch could be open.
Code Name Causes Possible Solutions
AL03 Emergency Override Bypass
The emergency override bypass input is active This is usually an intentional emergency run state. Check the digital
inputs for setting 25, then check the physical digital input terminal
DI-xx to see why it is closed.
Code Name Causes Possible Solutions
AL09 Restart Delay Active
The restart delay is active and the drive received a
Run command.
This is not an alarm. It is information to show that the drive is not
running. When you remove the Run command to the drive, the
AL09 alarm will go away.
Code Name Causes Possible Solutions
AL13 Loss of Load Detected
The motor is disconnected from the load
Replace the belt or coupling between the motor and the load. If the
bypass detected this alarm incorrectly, make sure that parameters
Z1-31 to Z1-36 are correct for your application.
Code Name Causes Possible Solutions
AL16 Input Phase Rotation
The phase rotation is incorrect while Z1-52 = 1 in
Bypass Mode.
Make sure that the sequence (phase rotation) of the input wiring to
the bypass package is correct.
Code Name Causes Possible Solutions
AL17 Remote Xfer disabled in Reverse
The drive is running in reverse and it received a
Remote Transfer command.
This is not an alarm. It is information to show that the bypass cannot
remote transfer when the drive is running in reverse.
Code Name Causes Possible Solutions
AL18 Auto Xfer disabled in Reverse
When auto transfer is enabled, the drive detects a
fault and it cannot transfer while it is running in
reverse.
This is not an alarm. It is information to show that the drive cannot
auto transfer when reverse run is active.
Code Name Causes Possible Solutions
AuFbl PI Aux Fdbk Lost Switched to Net
The analog input source is defective or broken. Make sure that you install the Auxiliary PI Feedback source and it
operates correctly.
Note:
• The drive detects this error if it detected a wire-break with the PI Auxiliary Control Feedback [H3-xx = 27] analog signal and it uses PI Auxiliary Feedback.
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
Code Name Causes Possible Solutions
AUXFB PI Aux Feedback Level Loss
The analog input from the terminal set to H3-xx = 27
[MFAI Function Selection = PI Auxiliary Control
Feedback Level] is more than 21 mA or less than 3
mA for longer than 1 s.
Repair transducer or wiring.
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 Causes Possible Solutions
bAT Keypad Battery Low Voltage
The keypad battery voltage is low. Replace the keypad battery.
Note:
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
• Set o4-24 [bAT Detection Selection] to enable/disable bAT detection.
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