McQuay WSC Operating Manual page 22

For example, pressing the Compressor-State button will yield the
following screen superimposed on the right side of the Detail
View Screen. The Compressor State screen is basically a
compilation of the events that the chiller sequences through at
startup. A green light (light gray in the figure) indicates that a
particular sequence requirement has been satisfied.
recommended that this screen be viewed during the start up
sequence. One can see the requirements light up as they are met
and quickly see why a non-start may have occurred. For example,
The Evap Flow OK will light when the evaporator flow switch is
closed by flow, Oil Sump Temp OK will light if (or when) the oil
temperature is above the Startup Temperature Setpoint, both
timers must be timed out, Oil Pressure OK will light when
sufficient oil pressure is achieved, etc.
The bottom three sections (from "RUN" down) are in effect
during the shut down process. The compressor is officially off
when the Postlube Timer is Done. The sequence transitions back
to OFF at this point and the OFF light will be illuminated.
Figure 10, View Compressor Input/Output Status
22
Figure 9, View Compressor State Screen
Pressing the Compressor I/O button on the
VIEW MENU screen will access the screen
shown to the right. It is superimposed on the
right side of the Detail View Screen. It gives
the status of the compressor digital inputs and
analog and digital outputs. Many of these I/Os
also appear in the Compressor State screen
since they are part of the start up sequence and
define the compressor state at any given time.
Dual compressor units will have two of any
compressor screen.
A COMP button will appear in the lower left-
hand corner of the Detail View Screen (Figure
6 on page 20) on dual compressor WDC units.
This button will toggle compressor data from
#1 compressor to #2 compressor.
It is
OM Centrif Micro ΙΙ-5