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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.
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:
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.
A
B
C
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:
- Lit: circuit C or unit shut down by alarm
- Flashing: circuit C or unit running with alarm present
Green LED:
The evaporator pump is running.
Yellow LEDs:
From top to bottom - start/stop status of compressor A1, A2, A3 and
A4 or B1, B2, B3 and B4 or C1, C2, C3 and C4. Flashing LED indi-
cates that the circuit is in the protection or defrost mode (A, B or C).
Green LED:
The unit operates in heating mode.
Green LED:
The unit operates in cooling mode.
SUMMARY INTERFACE PUSH BUTTONS (DUAL-CIRCUIT)
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: compressorA1/B1 operating hours in h/10 or h/100
Press 2: compressorA2/B2 operating hours in h/10 or h/100
Press 3: compressorA3/B3 operating hours in h/10 or h/100
Press 4: compressorA4/B4 operating hours in h/10 or h/100
(1) There is a separate button for each of the two circuits.
(1)
(1)
(1)
SUMMARY INTERFACE PUSH BUTTONS (TRIPLE-CIRCUIT)
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/C discharge pressure in kPa
Press 2: circuit A/B/C saturated condensing temperature in °C
Press 1: circuit A/B/C suction pressure in kPa
Press 2: circuit A/B/C saturated suction temperature in °C
Press 1: compressor A1/B1/C1 operating hours in h/10 or h/100
Press 2: compressorA2/B2/C2 operating hours in h/10 or h/100
Press 3: compressorA3/B3/C3 operating hours in h/10 or h/100
Press 4: compressorA4/B4/C4 operating hours in h/10 or h/100
Press 1: Selects circuit A to display information
(only on triple-circuit units)
Press 1: Selects circuit B to display information
(only on triple-circuit units)
Press 1: Selects circuit C to display information
(only on triple-circuit units)
(1) There is a common button for the three circuits; for circuit selection press one
of the three last buttons described above.
B
C
(1)
(1)
(1)
B
C
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.
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.
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.
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.
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