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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 LEDS
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 compressors A1, A2, A3 and A4
or B1, B2, B3 and B4. Flashing LED indicates that the circuit is in the
protection or defrost 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 leaving or entering 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 next becomes occupied.
CCN* CCN. The unit is controlled by CCN commands.
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. See section 5.19.
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 2-DIGIT DISPLAY 4-DIGIT DISPLAY
Press the Start/Stop C LOFF
button for less than
4 seconds (one short
press is enough).
If the button is t LOFF
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 4-DIGIT
DISPLAY DISPLAY
C LOFF
L-On
L-Sc
rEM
L-On
t L-On