YASKAWA P1000 Technical Manual page 206

6.5 Alarm Detection
HOA Keypad Display
<1>
AL16
Cause
Incorrect phase rotation while Z1-52 is set to 1 in
Bypass Mode.
<1> Available in bypass controller software versions VST800298 and later.
HOA Keypad Display
bb
Cause
External baseblock signal was entered via one of
the multi-function input terminals (S1 to S7)
HOA Keypad Display
bb
Cause
External baseblock signal was entered via one of
the multi-function input terminals (S1 to S7)
Connection is broken or master controller stopped
communicating
HOA Keypad Display
bUS
Cause
Connection is broken or master controller stopped
communicating
Option is damaged
The option is not properly connected to the drive
A data error occurred due to noise
HOA Keypad Display
CALL
Cause
Communications wiring is faulty, there is a short
circuit, or something is not connected properly
Programming error on the master side
Communications circuitry is damaged
206
Input Phase Rotation
Check the sequence (phase rotation) of the input wiring to the bypass package.
Table 6.10 Alarm Codes, Causes, and Possible Solutions
Baseblock
Drive output interrupted as indicated by an external baseblock signal.
Check external sequence and baseblock signal input timing.
Baseblock
Drive output interrupted as indicated by an external baseblock signal.
Check external sequence and baseblock signal input timing.
• Check for faulty wiring.
• Correct the wiring.
• Check for disconnected cables and short circuits. Repair as needed.
Option Communication Error
• The connection was lost after initial communication was established.
• Assign a Run command frequency reference to the option.
• Check for faulty wiring.
• Correct the wiring.
• Check for disconnected cables and short circuits. Repair as needed.
If there are no problems with the wiring and the fault continues to occur, replace the option.
• The connector pins on the option are not properly lined up with the connector pins on the drive.
• Reinstall the option.
• Check options available to minimize the effects of noise.
• Take steps to counteract noise in the control circuit wiring, main circuit lines and ground wiring.
• Try to reduce noise on the controller side.
• Use surge absorbers on magnetic contactors or other equipment causing the disturbance.
• Use recommended cables or some other type of shielded line. Ground the shield to the controller
side or on the input power side.
• Separate the wiring for communication devices from the drive input power lines.
Serial Communication Transmission Error
Communication has not yet been established.
• Check for wiring errors.
• Correct the wiring.
• Check for disconnected cables and short circuits. Repair as needed.
Check communications at start-up and correct programming errors.
• Perform a self-diagnostics check.
• If the problem continues, replace either the control board or the entire drive. For instructions on
replacing the control board, contact Yaskawa or your nearest sales representative.
YASKAWA SIEP YAIP1B 01B YASKAWA AC Drive – P1000 Bypass Technical Manual
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions