31
13. INPUtS / oUtPUtS
13.1. tEMPERAtURE SENSoRS
three different types of sensors are used.
important: the different sensors use different temperature / resistance characteristics and are not interchangeable.
DISPLAY
DESCRIPtIoN
INPUt
tYPE
RANGE
t01
eWt entering Water temperature
b1
carel ntc
-50°c to 95°c
t02
lWt leaving Water temperature
b2
carel ntc
-50°c to 95°c
t03
oct outdoor coil temperature
b3
airwell ntc
-50°c to 95°c
t04
oat outdoor air temperature
b4
airwell ntc
-50°c to 95°c
t05
cdt compressor discharge temp
b5
carel ht ntc
0 to 150°c
t06
cst compressor suction temperature
b6
airwell ntc
-50°c to 95°c
t08
dhWt domestic hot Water temp
b8
carel ntc
-50°c to 95°c
the temperature and pressure sensors can be checked by using the display in the tP menu to see the value. all
values are instantaneous except the oat sensor.
13.1.1. oAt SENSoR
the oat value is read when the fan is on and is averaged over a few minutes. When the fan turns off the last value
is used for 30 minutes before the instantaneous value is used. the fan will run for 3 minutes every 30 minutes when
there is a heating demand so that the outdoor temperature is not influenced by heat sources. if a remote sensor is
used the value read becomes the instantaneous value when the parameter h11 =on and the fan cycling is cancelled.
13.2. PRESSURE tRANSDUCER
the low pressure transducer is connected to the input b7.
²
type:
0-4.5V ratiometric.
²
range:
0 to15 bar
²
Voltage input: 5Vdc
When the compressor is off and outdoor temperature is high the refrigerant pressure could exceed
15bar. therefore in some conditions the transducer alarm is bypassed to avoid unnecessary alarms.
13.3. CoNFIGURAtIoN INPUtS
the inputs b11 and b12 are used to configure the type of units.
these inputs must correspond to the model. the configuration can be checked using Par ->cnF -> h04.
an incorrect configuration could lead to irreversible compressor damage or the compressor not starting.
VALUE
H04
+
Exits without changing the value
Stores the new value
Decreases the value
Increases the value
+
CnF
+
0
+
PSS
+
LWT / OFF
