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4.14.9. Purge System Status
This function determines the chiller STATSTOP command.
There are 4 control modes (LOCAL, LOCAL SCHEDULE,
REMOTE, NETWORK) can be selected. In a certain control
mode, only appropriate control sources are valid to start or
stop chiller.
Local
When control mode is LOCAL, the chiller can be started by
“Local ON” button on UI screen and be shut down by
“Conrm Stop” buttons on screen, EMSTOP software point.
Network
When control mode is NETWORK, chiller can be started and
stopped by the CHIL_S_S and CHIL_OCC software point
which is written by other equipment through network command
and network schedule. Only when both points are written as
“YES”, the chiller will start up. Also, chiller can be shut down
by EMSTOP software point, STOP button on UI screen.
Local Schedule
When control mode is LOCAL SCHEDULE, chiller will be
automatically started if configurable local schedule is
occupied and be shut down by unoccupied schedule,
EMSTOP software point, STOP button on UI screen.
Remote
When control mode is REMOTE, chiller will be started and shut
down by the remote discrete input (IOB1_DI3: REM_CON)
located on the I/O board. Also, chiller can be shut down by
EMSTOP point, STOP button on UI screen.
NOTE: there is a STOP OVERRIDE point in GENUNIT
table, if this point is enabled, the chiller cannot be started
and chiller should be stopped if it is running.
Compressor Run Status is shown on the top of default screen.
0 STATSTOP is STOP, no alarm.
1 Control test is active
2 Pump down is active
3 Lockout in is active
4 Recycle shutdown completed on low load in eect until
the need for cooling resumes; non-fault condition
5 Shutdown completed due to alarm fault condition.
6 The control is delaying the start sequence until the
Start to Start and Stop to Start timers have elapsed
7 The chiller is in the process of the checks prior to
energizing the compressor motor
8 Normal Startup in progress
9 Auto Restart in pending
10 Ramp loading in progress. The chiller has started
and is slowly increasing its load to control electrical
demand charges
11 The chiller has completed ramp loading following
start up. Normal running mode, no override or
demand limit
12 Running with Override active
13 Running with Demand Limit Active; The chiller is
prevented from loading further because it has
reached the an AVERAGE LOAD CURRENT Limit or
a MOTOR KILOWATTS Limit
14 Shutdown compressor in progress
15 Free Cooling in progress
16 Condenser Flush in progress
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