![background image](http://html.mh-extra.com/html/carrier/pro-dialog-plus-30gk-series/pro-dialog-plus-30gk-series_installation-operation-and-maintenance-instructions-manual_2562220027.webp)
27
5 - PRO-DIALOG PLUS CONTROL OPERATION
5.1 - 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: these contacts are used when
the unit is in remote operating type (rEM). See sections
3.6.2 and 3.6.3.
-
CHIL_S_S: this network command relates to the chiller
start/stop when the unit is in CCN control (CCn). Vari-
able forced to disable: the unit is halted. Variable forced to
Enable: the unit runs in accordance with schedule 1.
-
Start/Stop schedule: occupied or unoccupied status of the
unit as determined by the chiller start/stop program
(Schedule #1). Used when the unit is equipped with an
optional CCN/clock board, otherwise the chiller occupied
mode is forced to occupied all the time.
-
Master control type. This parameter is used when the
unit is the master unit in a two chiller lead/lag arrange-
ment. The master control type determines whether the unit
is to be controlled locally, remotely or through CCN (this
parameter is a Service configuration).
-
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 failure.
The current heat/cool operating mode on the unit is indicated
by item 4 in the Information menu and by the heat/cool LEDs
on the summary interface.
ON/OFF
STATUS
Off
On
On
On
On
On
On
CONTROL TYPE
-
Local
Local
Remote
Remote
CCN
CCN
HEATING/COOLING
SELECTION IN LOCAL MODE
-
Cooling
Heating
-
-
-
-
REMOTE HEATING/
COOLING CONTACTS
-
-
-
Cooling mode
Heating mode
-
-
HC_SEL
-
-
-
-
-
Cooling
Heating
OPERATING MODE
Cooling
Cooling
Heating
Cooling
Heating
Cooling
Heating
PARAMETER STATUS
ACTIVE OPERATING TYPE
STATUS OF PARAMETERS
CONTROL UNIT
TYPE
MODE
REMOTE
MASTER
START/STOP CCN
GENERAL
START/STOP
CONTROL
SCHEDULE
EMERGENCY
ALARM
LOFF L-ON
L-SC
rEM
CCN
MASt
CHIL_S_S
CONTACT
TYPE
MODE
SHUTDOWN
-
-
-
-
-
-
-
-
-
-
Enable
-
-
Off
-
-
-
-
-
-
-
-
-.
-.
-
Yes
-
Off
Active -
-
-
-
-
-
-
-
-
-
-
Local
Off
-
-
Active
-
-
-
-
-
-
Unoccupied
-
-
Local
Off
-
-
-
Active
-
-
-
Off
-
-
-
-
Remote
Off
-
-
-
Active
-
-
-
-
-
Unoccupied
-
-
Remote
Off
-
-
-
-
Active
-
Disable
-
-
-
-
-
CCN
Off
-
-
-
-
Active
-
-
-
-
Unoccupied
-
-
CCN
Off
-
-
-
-
-
Active
-
-
Local
Unoccupied
-
-
Local
Off
-
-
-
-
-
Active
-
Off
Remote
-
-
-
Remote
Off
-
-
-
-
-
Active
-
-
Remote
Unoccupied
-
-
Remote
Off
-
-
-
-
-
Active
Disable
-
CCN
-
-
-
CCN
Off
-
-
-
-
-
Active
-
-
CCN
Unoccupied
-
-
CCN
Off
-
Active
-
-
-
-
-
-
-
-
Disable
No
Local
On
-
-
Active
-
-
-
-
-
-
Occupied
Disable
No
Local
On
-
-
-
Active
-
-
-
On
-
Occupied
Dsable
No
Remote
On
-
-
-
-
Active
-
Enable
-
-
Occupied
Disable
No
CCN
On
-
-
-
-
-
Active
-
-
Local
Occupied
Disable
No
Local
On
-
-
-
-
-
Active
-
On
Remote
Occupied
Disable
No
Remote
On
-
-
-
-
-
Active
Enable
-
CCN
Occupied
Disable
No
CCN
On
5.2 - Heating/cooling selection
On heat pumps, heating/cooling selection can be controlled
differently depending on the active operating type:
•
Locally on the unit, using operating types L-C1, L-C2,
LC1r and LC2r (for cooling) and L-H (for heating).
•
Remotely using the heat/cool selection volt-free contact
when the unit is in Remote operating type (rEM).
•
Via a CCN command when the unit is in CCN operating
type (CCn).