58
Water outlet sensor on heat exchanger 2:
CTN 10 K at 25°C (if P2 = 1, 2 or 3)(if P6 = 2
→ two s manifold sensors).
This sensor monitors the water temperature on the exchanger outlet in order to:
- Enable the frost protection
- Display the water outlet temperature (display range: -40 to
99.9°C, resolution: 0.1 K).
- This fault is acknowledged automatically
- Sensor wire cut and sensor short circuit
→ Fault relay in On position
This sensor is not used for control (i.e. it is used only for frost
protection; control is provided by the manifold sensor). The fault is
a circuit fault (message on LCD, circuit fault LED lit steady, fault
saved in fault memory).
Outdoor air sensor:
CTN 10 K at 25°C
This sensor monitors the temperature of the outdoor air in order to:
- Adjust the system based on the outdoor temperature (cooling
and heating). If the sensor wire is cut (open circuit) or the sensor
short-circuits, the unit is adjusted to the setpoint value (heating
and cooling) and a fault is displayed.
- Limit the operation of the unit based on the minimum
temperature in heating mode.
- Display the outdoor air temperature (display range: -40 to
99.9°C, resolution: 0.1 K).
- This fault is acknowledged automatically
- Sensor wire cut and short circuit:
. Control based on outdoor temperature inhibited; control using setpoint.
. If the unit is running in heating mode and can run with the
electric stages, the compressors are shut off, control is on the
electric stages, a message appears on the LCD, the unit fault
LED flashes, and the fault is saved in fault memory.
. If P2 = water-to-water, the unit continues to operate and the fault
is reported (message from table 2 in machine status menu shown
on LCD, unit fault LED flashes, fault saved in fault memory)
. In all other cases: unit shut off, message on LCD (table 1 in machine
status menu), unit fault LED lit steady, fault saved in fault memory,
heat trace cabled turned on, fault relay in On position, boiler relay in
On position if heating mode on and P111 = boiler.
Frost protection sensor for refrigerant in heat exchanger (1 or 2):
CTN 10 K at 25°C (if P2 =1, 2 or 3 unless P1 = R407C, P2 = 3 and P3 = 2).
This sensor monitors the temperature of the refrigerant at the heat exchanger inlet in order to:
- Protect the heat exchanger from frost:
. Power reduced if several control stages are used
. Slope of fans changed
. Unit shut off
- Refrigerant frost protection temperature displayed (display
range: -40 to 99.9°C, resolution: 0.1 K)
- This fault is acknowledged automatically
- If the sensor wire is cut or the sensor short-circuits, the
corresponding circuit is shut off, a message appears on the LCD,
the circuit x fault LED is lit steady, the fault is saved in the fault
memory, the general fault relay is in the On position, and the
auxiliary heaters are turned on if heating mode is on.
Coil sensor (A to D):
CTN 10 K at 25°C
If P2 = reversible air-to-water, this sensor manages the freon temperature at the coil outlet in order to:
- Manage (turn on and off) a defrosting cycle
- Display the coil temperature (display range: -40 to 99.9°C,
resolution 0.1 K).
- This fault is acknowledged automatically
If the sensor wire is cut or the sensor short-circuits:
In cooling mode:
Normal operation, message on LCD, circuit x fault LED flashes, fault saved in fault memory.
In heating mode:
- If outdoor temperature
10°C
→ normal operation, message on
LCD, circuit x fault LED flashes, fault saved in fault memory.
- If outdoor temperature < 10°C
→ circuit x shut off, message on
LCD, circuit fault LED flashes, fault saved in fault memory.
Condenser hot water sensor:
CTN 10 K at 25°C (if P2 = 1 and P141 = 3 or 4) = P258 (if P2 = 1 and P141 = 1) = P257
This sensor monitors the water temperature at the condenser exchanger
‟s inlet (or outlet) in order to:
- Adjust in heating mode
- Display the condenser
‟s water temperature (display range: -40 to 99.9°C, resolution: 0.1 K)
This fault is acknowledged automatically
- Sensor wire cut and short circuit:
In cooling mode:
Normal control, message on LCD, unit fault LED flashes, fault saved in fault memory, general fault relay in On position.
In heating mode:
Unit shut off, message on LCD, unit fault LED flashes, fault saved in fault memory, general fault relay in On position, boiler relay in On position
if P111 = boiler.
E X C H . 2 W A T E R O U T L E T
S E N S O R F A U L T A D D 2 J 4 / 1 - 2
O U T . T E M P . S E N S O R F A U L T
J 7 / 1 - 2
E X C H . x R E F R . F R O S T
P R O T . S E N S . F A U L T J x / x - x
C O I L x C I R C U I T x
S E N S O R F A U L T J x / x - x
C O N D E N S E R I N L E T S E N S O R
F A U L T J 7 / 5 - 6
Содержание Magister 2 Series
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