Table 3: Status messages
Message Description
System Run The chiller is running under the condition described in the Details Line of the Status Bar.
System Coastdown The chiller has shut down and the Post-run lubrication is being performed.
System Start Inhibit The chiller is prevented from being started due to the reason displayed on the Details Line of
the Status bar.
Run messages
Table 4: Run messages
Message Description
Leaving Chilled Liquid
Control
The chiller is running, controlling the Leaving Chilled Liquid to the Leaving
Chilled Liquid Temperature Setpoint. There are no system conditions inhibiting this
operation.
System In Lead
Compressor Pulldown
Displayed while a Lead Compressor Pulldown Time Setpoint (0-255 minutes) is in
effect. The time remaining in the period is also displayed. For the duration of this period,
only the lead compressor will be permitted to run. The lag compressor will not be brought
on line during this period. A current limit may be applied to the lead motor during this
period using the Lead Compressor Pulldown Demand Limit Setpoint (30-100%). See
the complete explanation in Description of system and fundamentals of operation.
Lead Motor-high Current
Limit
Either the Lead Compressor Pulldown Demand Time Setpoint is in effect and the lead
compressor motor current is being limited by the Lead Compressor Pulldown Demand
Limit Setpoint, or the Lead Compressor Pulldown Demand Time Setpoint has
elapsed and the lead compressor motor current is being limited by the Chiller Current
Limit Setpoint.
Refer to the Motor details screen for details of the conditions above.
When the motor current increases to the inhibit open threshold, the pre-rotation vanes are
inhibited from further opening. This prevents a further current rise. If the current continues
to rise to the start close threshold, the Vanes begin closing until the current falls to the stop
close threshold. Automatic vane operation is resumed and this message automatically clears
when the motor current decreases to the allow open threshold.
Lag Compressor Prelube A start has been initiated on the lag compressor and the 50 second pre-start lubrication is
being performed.
Lag Compressor
Coastdown
The lag compressor has shutdown and the 150 second post-run lubrication is being
performed on the lag compressor.
Lag Compressor
Unloading Before
Shutdown
Displayed while the pre-rotation vanes and discharge valves are closing during a soft
shutdown of the lag compressor.
Vanes #1 Start Inhibit-
motor Switch Open
Compressor #1 is inhibited from starting because its pre-rotation vanes are not fully closed
(Vane motor switch open), but compressor #2 is able to run and thus the chiller is not
prevented from operating. This message clears when the vanes have fully closed.
Vanes #2 Start Inhibit-
motor Switch Open
Compressor #2 is inhibited from starting because its pre-rotation vanes are not fully closed
(Vane motor switch open), but compressor #1 is able to run and thus the chiller is not
prevented from operating. This message clears when the vanes have fully closed.
Motor #1 Start Inhibit
– Anti-recycle
Compressor #1 is inhibited from starting because its 30 minute anti-recycle period is in
effect, but compressor #2 is able to run. This message clears when the 30 minute timer
expires.
Motor #2 Start Inhibit
– Anti-recycle
Compressor #2 is inhibited from starting because its 30 minute anti-recycle period is in
effect, but compressor #1 is able to run. This message clears when the 30 minute timer
expires.
Model YD Mod D with OptiView Control Center34
To Next Page
Loading...
