Touch Pilot Control Operation; Start / Stop Control; Unit Stop Function - Carrier Touch Pilot Manual

7 - TOUCH PILOT CONTROL OPERATION

7.1 - Start / Stop control

The unit state is determined based on a number of factors,
including.its.operating.type,.active.overrides,.open.contacts,.
master/slave. configuration,. 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: Operating type is selected using the
Start/Stop button on the user interface.
LOFF
L-C
L-SC
Rem.
Net.
Mast
• Start/stop force command [CHIL_S_S]:
Unit start/stop force command can be used to control
the unit state in the Network operating type.
- Command set to stop: The unit is halted.
- Command set to start: The unit runs in accordance
with schedule 1.
Active operating type
LOFF L-C L-SC Rem
- - - -
- - - -
active - - -
- - active -
- - - active
- - - active
- - - -
- - - -
- - - -
- - - -
- - - -
- - - -
- - - -
- active - -
- - active -
- - - active
- - - -
- - - -
- - - -
- - - -
IMPORTANT: 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.
Local off
Local on
Local schedule
Remote
Network
Master unit
Start/Stop
Net. Mast force
command
- -
- - -
- - -
- - -
- - -
- - -
active - disabled
active - -
- active -
- active -
- active -
- active disabled
- active -
- - -
- - -
- - -
active - enabled
- active -
- active -
- active enabled
• Remote start/stop contact status [Onoff_sw]:
Start/stop contact can be used to control the unit state
in the Remote operating type.
• Master control type [ms_ctrl]:
When the unit is the master unit in a two-unit master/
slave.arrangement,.the.master.unit.may.be.set.to.be.
controlled.locally,.remotely.or.via.network.
(see also section 7.15).
• Start/stop schedule [chill_occ]:
Occupied or unoccupied status of the unit.
• Network emergency stop command [EMMSTOP]:
If.activated,.the.unit.shuts.down.regardless.of.the.active.
operating type.
• General alarm:
The unit shuts down due to failure.

7.2 - Unit stop function

This function controls the unit compressor capacity reduction.
If there is an alarm or a demand to stop, it forces the
compressors to the minimum capacity before stopping them.
Parameters status
Remote Master
Start/Stop
start/stop control
schedule
contact type
- -
- -
- -
- - unoccupied
open -
- - unoccupied
- -
- - unoccupied
- local unoccupied
open remote
- remote unoccupied
- network
- network unoccupied
- -
- - occupied
closed - occupied
- - occupied
- local occupied
closed remote occupied
- network occupied
Network
Alarm
Emergency
shutdown
Shutdown
- enabled -
- - yes
- - -
- -
- - -
- -
- - -
- -
- -
- - -
- -
- - -
- -
- disabled no
disabled no
disabled no
disabled no
disabled no
disabled no
disabled no
Control Unit
type state
- off
- off
local off
local off
remote off
remote off
network off
network off
local off
remote off
remote off
network off
network off
local on
local on
remote on
network on
local on
remote on
network on
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