HOA Keypad Display Fault Name
FB09
Phase Loss Blackout
Note: A fault reset is required. An EF0 is sent to the drive and drive output contactor K2 and
Bypass contactor K3 are opened.
The contactor coil voltage was detected below the configured blackout voltage level.
Cause Possible Solution
Input power is too low or has dipped too low. Verify input power is sufficient to power the bypass.
Settings for blackout are incorrect. Verify Z1-29 (Blackout Voltage Level) is set properly.
HOA Keypad Display Fault Name
FB10
No Drive Comms
Note: A fault reset is required. An EF0 is not sent to the drive and Bypass contactor K3 is not
affected.
An unexpected loss of communication to the drive lasting longer than 15 seconds has been detected.
Cause Possible Solution
The cable between the bypass controller and the
drive is disconnected or has been damaged.
Verify the cable between the bypass controller board (A2) connector CN6 to drive terminal TB4 is
connected at both ends and is not damaged.
The bypass controller circuit has become
defective.
Replace the bypass control board.
The drive circuitry has become defective. Replace the drive.
HOA Keypad Display Fault Name
FB11
Bypass Board Hardware Error
Note: A fault reset is not required. An EF0 is not sent to the drive. The drive output contactor
K2 and and bypass contactor K3 are opened.
The bypass control board failed.
Cause Possible Solution
An unexpected event occurred with the bypass
controller circuitry.
Replace the bypass controller board.
HOA Keypad Display Fault Name
FB12
Option Board Comms
Note: Fault reset will not remove the fault.
Loss of communication to the communication option board. This fault can only occur if the bypass
is programmed to be controlled by the option card (one or more of the following): Z1-07 = 3, Z1-08
= 2, Z1-38 = 2, or Z1-39 = 2.
Cause Possible Solution
Communication between the option card and
bypass board have timed out and communication
has stopped
Ensure the option card is mounted properly. Replace the option card and cycle power to the bypass
board.
HOA Keypad Display Fault Name
FB13
Loss of Load
Note: A fault reset is required. An EF0 fault is sent to the drive and drive output contactor
K2 and bypass contactor K3 are opened.
The conditions were such that it appears the motor has become disconnected from the load.
Cause Possible Solution
The motor is disconnect from the drive Check the continuity between the drive/bypass and the motor.
The load has been disconnected from the motor Check the belt/coupling between the motor and the load
The Loss of Load settings are not proper. Review and adjust the Loss of Load parameters Z1-31 to Z1-36.
HOA Keypad Display Fault Name
FB14
Serial Communications Fault
Note: A fault reset is required. Behavior of the drive and the contactors during an FB14 fault
is determined by parameter Z3-05.
Serial communications timeout
Cause Possible Solution
6.4 Fault Detection
YASKAWA ELECTRIC SIEP YAIZ1B 01E YASKAWA AC Drive – Z1000 Bypass Technical Manual
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6
Diagnostics &
Troubleshooting
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