This warning not occur when the Bearing Temperature Protection Setpoint is set to Disabled on the
MOTOR DETAILS Screen. Also, it will not act on any RTD input registering as an open RTD.
Warning – Motor – Bearing Vibration Baseline Not Set
Displayed until both the Shaft End and Opposite Shaft End motor bearing vibration baseline values
are entered on the MOTOR DETAILS Screen. This can be done either manually with the Manual
Baseline Setpoint or automatically with the AUTO BASELINE key on that screen. While this message
is displayed, the vibration baseline values are set to X.X.
Warning – Motor – High Bearing Vibration
Either the Shaft End or Opposite Shaft End motor bearing vibration has exceeded the value
programmed for the High Vibration Warning Setpoint for the programmed number of Delay
seconds. The warning will automatically clear when both vibration values decrease below the
warning threshold. This warning does not occur when the Motor Vibration Protection Setpoint is set
to Disabled on the MOTOR DETAILS Screen or while the WARNING – MOTOR – BEARING VIBRATION
BASELINE NOT SET warning is displayed.
Routine shutdown messages
Remote Stop
A shutdown command has been received from a re-mote device. Remote stop commands can be
received in Hardwire Remote mode via I/O Board TB4-7/8 or in BAS Remote mode via the SC-EQ
serial communications. If the chiller is running when this occurs, the Pre-rotation Vanes are driven
fully closed prior to shutting down the chiller.
Local Stop
A local shutdown command has been initiated by the Operator pressing the Soft Stop button on the
Home screen.
Cycling shutdown messages
Multiunit Cycling – Contacts Open
The Multiunit Cycling contacts connected to I/O Board TB4-9, have opened to initiate a cycling
shutdown. If the chiller is running when this occurs, the Pre-rotation Vanes are driven fully closed
prior to shutting down the chiller. The chiller will automatically restart when the contacts close.
System Cycling – Contacts Open
The System Cycling contacts connected to I/O Board TB4-13, have opened to initiate a cycling
shutdown. If the chiller is running when this occurs, the Pre-rotation Vanes are driven fully closed
prior to shutting down the chiller. The chiller will automatically restart when the contacts close.
Oil – Low Temperature Differential
The chiller is prevented from starting because for one of the following reasons. The chiller will
automatically restart when the conditions have been satisfied. This condition is only checked while
the chiller is stopped. In previous software versions, it is checked when stopped and during the first
10 seconds of prelube.
Reasons preventing startup:
•
The chiller has been shut down for less than or equal to 30 minutes and the oil temperature
minus the condenser saturation temperature is less than 30°F.
Model YK Style H Centrifugal Liquid Chillers with OptiView Control Center
172
