Daikin D-AHU Professional AH-ERQ-U, Руководство по эксплуатации

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6.10.2 Alarm list
Next table shows all alarm strings that appears on screen when an alarm occurs, with the respective causes and
solutions list.
Alarm String Description Possible causes & solutions
Outside temp:
-no sensor
-over range
-under range
-shortd loop
Error condition on the outside
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
Room temp:
-no sensor
-over range
-under range
-shortd loop
Error condition on the room
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 nominal
resistance.
Return temp:
-no sensor
-over range
-under range
-shortd loop
Error condition on the return
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