Carrier 30WI Manual page 65

10 - MANAGEMENT OF THE ANALOGUE INPUTS
■ 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).
- Automatic acknowledgement
O U T .
- 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
- R efrigerant frost protection temperature displayed (display range: 40 to 99.9°C, resolution: 0.1 K)
- Automatic acknowledgement
E X C H . x
P R O T .
- 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:Gérer (lancer et arrêter) un
dégivrage :
- Manage (turn on and off) a defrosting cycle
- Display the coil temperature (display range: 40 to 99.9°C, resolution: 0.1 K)
- Automatic acknowledgement
C O I L .
S E N S O R
If the sensor wire is cut or the sensor short-circuits :
► In cooling mode :
Fonctionnement normal, message LCD, led défaut circuit x clignotante, sauvegarde mémoire défaut.
► 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)
- Automatic acknowledgement
C O N D E N S E R
F A U L T
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.
T E M P . S E N S O R
J 7 / 1 - 2
R E F R .
S E N S . F A U L T
x C I R C U I T
F A U L T
I N L E T
J 7 / 5 - 6
F A U L T
F R O S T
J x / x - x
x
J x / x - x
S E N S O R
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