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Active operating type Status of parameters Control Unit mode
LOFF L-C L-SC rEM CCN TSTAT roof_cmd Remote G CCN emergency General alarm type
start/stop shutdown
contact
------- - -Active - - Off
------- - -- Yes - Off
Active - - - - - local Off
Active - Off - - - remote Off
Active Disable - - - - ccn Off
Active - - Off - - tstat Off
Active - - - Disable No local On
Active - - - Disable No local On
Active - On - Disable No remote On
Active Enable - - Disable No ccn On
Active - - On Disable No tstat On
Unit status Heating/cooling Indoor fan Occupied? Compressor Capacity Economiser Indoor fan
cycling capacity of additional position
stages
Off - - - --- Off
Start-up - - - - - - On
delay
On/ - - - Higher than 0 - - On
shut down
On/ - - - - Higher than 0 - On
shut down
On/ - - - - - Higher than minimum On
shut down economiser position
On Cooling - - - - - On
On Heating - - - - - On
On - 0 - --- On
On - 1 Yes --- On
On Standby 1/2 No - - - On for at least 2’30”
On Standby 1/2 No = 0 = 0 Lower or equal to min. On for 2’30” then off
economiser position
On Standby 2 Yes = 0 = 0 Lower or equal to min. On for 2’30” then off
economiser position
Shut down - - No - - - On
Shut down - - No = 0 = 0 Lower or equal to min.
economiser position Off
5.2 - Start/stop control
The table below summarises the unit control type and stop or
go status with regard to the following parameters.
- Operating type: this is selected using the start/stop button
on the front of the user interface.
- Remote start/stop contacts: this contact is used when the
unit is in remote (rEM) or thermostat (tStA) operating
type. Open contact: unit shut down. Closed contact: the
unit operates on a setpoint, in accordance with the time
schedule.
- ROOF_CMD: variable unit setpoint command, under
CCN operation control (CCn). Variable forced to shut-
down: unit shuts down. Variable forced to on: unit
authorised to start.
- CCN emergency shutdown: if this CCN command is
activated, it shuts the unit down whatever the active
operating type.
- General alarm: the unit is totally stopped due to an alarm.
5.3 - Indoor fan on/off control
The table below summarises the fan operation based on
different parameters:
- heating/cooling: unit operating mode.
- indoor fan cycling: this user parameter permits
optimisation of the indoor fan usage.
- Occupied?: occupied or unoccupied status of the unit
selected by the time schedule.
- compressor capacity: number of compressors operating
- capacity of additional stages: number of additional
stages operating
- economiser position: economiser position in relation to
the minimum configurable.
- indoor fan: fan status.
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