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The summary interface (right hand section) includes a mimic
diagram of the unit, together with push-buttons and LEDs. It
gives quick access to the main operating parameters of the unit.
SUMMARY INTERFACE LED'S
LED
INDICATION WHEN LIT
Green LED:
The unit is authorised to start or is already running
Red LED:
- Lit: circuit A or unit shut down by alarm
- Flashing: circuit A or unit running with alarm present
Red LED:
- Lit: circuit B or unit shut down by alarm
- Flashing: circuit B or unit running with alarm present
Red LED:
Water flow switch default or user safety lock open.
Green LED:
The evaporator pump is running.
Yellow LEDs:
From top to bottom - start/stop status of compressor A1 and A2 or B1
and B2. Flashing LED indicates that the circuit is in the appropriate
protection mode (A or B).
Green LED:
The unit operates in heating mode.
Green LED:
The unit operates in cooling mode.
SUMMARY INTERFACE PUSH BUTTONS
BUTTON DISPLAY
Blue button: evaporator entering or leaving water temperature in °C
Red button: condenser entering or leaving water temperature in °C
Gray button: outdoor air temperature in °C
Control point (setpoint + reset) in °C
Press 1: circuit A/B discharge pressure in kPa
Press 2: circuit A/B saturated condensing temperature in °C
Press 1: circuit A/B suction pressure in kPa
Press 2: circuit A/B saturated suction temperature in °C
Press 1: compressor A1/B1 operating hours in h/10 or h/100
Press 2: compressor A2/B2 operating hours in h/10 or h/100
4.2 - Unit start/stop control
4.2.1 - Description
The unit start/stop can be controlled by one of the following
methods:
•
Locally on the actual unit (Local control type)
•
By remote control with the aid of user contacts (remote
control type)
•
By CCN control with the aid of the CCN (CCN control
type)
The main interface includes a Start/Stop button which can be
used to stop or start the unit in the local operating type or to
select the remote or CCN operating type.
The available operating types are described in the following
table.
The following operating types can be selected using the
Start/Stop button:
OPERATING TYPES
4 DIGIT DISPLAY
DESCRIPTION
LOFF
Local Off. The unit is halted in local mode.
L-On
Local On. The unit is in local control mode and is
authorised to start.
L-Sc*
Local On - timer control. The unit is in local control
mode. It is authorised to start if the period is occupied.
If the timer program for unit operation is unoccupied,
the unit remains shut down until the period becomes
occupied. This is displayed if the unit is equipped with
an optional CCN/clock board. See section 3.1.
CCN*
CCN. The unit is controlled by CCN commands. This
is displayed if the unit is equipped with an optional
CCN clock board. See section 3.1.
rEM*
Remote. The unit is controlled by remote control
contacts.
MAST*
Master Unit. The unit runs as a master in a two unit
lead/lag arrangement. This is displayed if the unit is
configured for master/slave control and if the unit is
equipped with an optional CCN clock board. See
section 5.11.
Legend
*
Displayed if the configuration requires it.
Section 5.1 gives a more detailed description of the commands to start/stop
the unit, analysed by operating type.
4.2.2 - Stopping the unit in local mode
The unit can be stopped in local mode at any time by pressing
the Start/Stop button.
TO STOP THE UNIT
BUTTON
ACTION
Press the Start/Stop
button for less than
4 seconds (one short
press is enough).
If the button is
released, the unit stops
without the need for
further action.
4.2.3 - Starting unit and selecting an operating type
The unit can be started in local mode, or unit operating type
can be changed at any time using the Start/Stop button. In the
example that follows, the unit is stopped (LOFF) and the user
wants to start the unit in local mode.
CHANGING THE OPERATING TYPE
BUTTON
ACTION
Continually press the operating type
selection button for more than 4 seconds.
Hold down the Start/Stop button.
The available operating types are displayed
one by one until the button is released.
Release the Start/Stop button if the
operating type you want is displayed (in this
example L-On). "C" flashes in the 2-digit
display to show that the controller is
awaiting confirmation.
Press the Enter button to confirm the
operating type selected (in this example:
L-On). "t" is displayed in the 2-digit display
to indicate the operating type selected. If
the Enter button is not pressed soon
enough, the controller will cancel the
change and continue to use the previous
operating type.
2-DIGIT DISPLAY
4-DIGIT DISPLAY
C
LOFF
t
LOFF
2-DIGIT
4-DIGIT
DISPLAY
DISPLAY
C
LOFF
L-On
L-Sc
rEM
L-On
t
L-On
9
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