YASKAWA Z1000U Technical Manual page 185

If input phase rotation is reversed and this parameter is set to 2, an "FB16 – Inp Phase Rotation" fault will be displayed when
operation starts in Bypass Mode and the drive will coast to stop.
Controls the behavior of the bypass phase rotation detection when operating in Bypass Mode.
No.
Z1-52
Setting 0: Disabled
Setting 1: Alarm
Setting 2: Fault
n Z1-53: Load Verification Fault Select
Enables and disables verification that the motor is running when commanded to run.
When this function is enabled and the bypass detects a loss of output current, such as an open external motor disconnect, or a
zero frequency reference command for longer than 10 seconds, the bypass will display a "Load Lost" fault, coast to stop, and
any digital output programmed to "Damper Act Out" (Z2-2o = 20) will open.
The "Load Lost" fault is disabled during smoke purge operation.
Note: Parameter available in bypass controller software versions VST800400 and later.
No.
Z1-53
Setting 0: Disabled
Setting 1: Enabled
YASKAWA SIEP YAIZ1D 01C Z1000U HVAC MATRIX Drive Bypass Technical Manual
Name
Bypass Phase Rotation
Name
Load Verification Fault Select
Run (Auto)
Input
Run Interlock
Input (BAS)
Output
Frequency
Output
Current
Damper Actuator
Output
(Z2-2 =20)
Load Lost
Fault
Figure 5.59 Motor Disconnected at Start
Motor Disconnected at Start
10%
10 seconds
5.14 Z: Bypass Parameters
Setting Range
0 to 2
Setting Range
0 to 1
Default
1
Default
0
5
185