D-EOMOAH00903-21_01EN 23 / 37
Alarm String
Description
Possible causes & solutions
under
range
Measured value under
range
If the measured value is
wrong replace the sensor
shortd
loop
The sensor could be
broken
Disconnect the
temperature sensor from
the controller and
measure the resistance
value of the sensor. Refer
to the datasheet of the
sensor for the resistance
nominal value of sensor
Supply temp:
-no sensor
-over range
-under range
-shortd loop
Error condition on the supply
air temperature sensor:
measured temperature out of
the allowable range or error
condition on the sensor.
Error
Causes
Solutions
no
sensor
Sensor not connected
Check the wiring
connection of the
temperature sensor with
the controller or (if it is
powered) with the
electrical power
over
range
Measured value over
max limit
If the measured value is
wrong replace the sensor
under
range
Measured value under
range
If the measured value is
wrong replace the sensor
shortd
loop
The sensor could be
broken
Disconnect the
temperature sensor from
the controller and
measure the resistance
value of the sensor. Refer
to the datasheet of the
sensor for the resistance
nominal value of sensor
Pre-Heating
temp:
-no sensor
-over range
-under range
-shortd loop
Error condition on the pre-
heating air temperature
sensor: measured
temperature out of the
allowable range or error
condition on the sensor.
Error
Causes
Solutions
no
sensor
Sensor not connected
Check the wiring
connection of the
temperature sensor with
the controller or (if it is
powered) with the
electrical power
over
range
Measured value over
max limit
If the measured value is
wrong replace the sensor
under
range
Measured value under
range
If the measured value is
wrong replace the sensor
shortd
loop
The sensor could be
broken
Disconnect the
temperature sensor from
the controller and
measure the resistance
value of the sensor. Refer
to the datasheet of the
sensor for the resistance
nominal value of sensor
Causes
Solutions
