Johnson Controls YORK YVAM 0350, Operation & Maintenance Manual

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Variable speed drive (VSD) details screen
Figure 24: Variable speed drive (VSD) details screen
This screen displays more detailed parameters associated with the variable speed drive. This screen
also provides a means for a service technician to access setpoints or control the DC Bus manually
for maintenance or service.
Table 38: Display only fields
Field/LED name Description
Motor Run (LED) Indicates the digital output from the controls is commanding the motor to RUN.
DC Bus Regulating (LED) Indicates the variable speed drive is regulating the DC Bus.
Precharge Complete (LED) Indicates the drive DC Bus has been pre-charged.
Input Current Limit (LED) Indicates the chiller input current is at the Job FLA limit.
Cooling System (LED) Indicates the relay controlling the drive water pump output is energized.
Precharge Active (LED) Indicates the variable speed drive is pre-charging the DC Bus.
Output Current Rating Indicates the variable speed drive size reported from variable speed drive.
Phase Rotation Displays the phase rotation sequencing.
DC Bus Voltage Displays the DC Bus voltage.
Input kVA Displays the total kilovolt-Amps measured by the variable speed drive.
VSD Command The command from OptiView™ control to the variable speed drive. Commands are as
follows:
• 1 = Pre-Regulate
• 2 = Run
• 3 = Manual Precharge
• 4 = Manual Pre-Regulate
• 5 = Soft Shutdown
55 YVAM Control Center