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5. 19 SERIES CARRIER® SMARTVU
TM
CONTROL OPERATION
5.1. Start/Stop Control
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. In non local mode,
if you want to shut down in local mode after the unit is started, you need to firstly switch to local mode.
Local
When control mode is LOCAL, the chiller can be started by “Local ON” button on Control Mode screen
and be shut down by “Confirm Stop” buttons on screen or 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.
5.2. Chiller Run Status
Compressor Run Status is shown on the top of default screen.
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