6.5 - Unit start/stop control
The unit state is determined based on a number of factors,
including its operating type, active overrides, open contacts, , or
alarms triggered due to operating conditions.
The table given below summarises the unit control type
[ctrl_typ] and its running status with regard to the following
parameters:
■
Operating type:
This operating type is selected using the Start/
Stop button on the user interface.
IMPO
RTANT: When the unit is stopping or there is a demand to
stop the unit, compressors are stopped consecutively.
In case of emergency stop, all compressors are stopped at
the same time
.
Start/stop force command [ROOF_S_S]:
Rooftop
start/stop force command can be used to control the unit state
in the Network mode.
-
Command set to stop: The unit is halted.
-
Command set to start: The unit runs in accordance with
schedule 1.
■
Remote start/stop contact status [Onoff_sw]:
Start/stop
contact status can be used to control the unit state in the
Remote operating type.
■
G:
This contact is used when unit is in thermostat
operating type
■
Start/stop schedule [roof_occ]:
Occupied or unoccupied
status of the unit.
■
Network emergency stop command [EMSTOP]:
If activated,
the unit shuts down regardless of the active operating type.
■
General alarm:
The unit shuts down due to failure.
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