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AB Industrietechnik srl – Via Julius Durst, 70 – 39042 BRESSANONE (BZ) Italy – Tel: +39 0472/830626 – [email protected] – www.industrietechnik.it
EO2
AI2 sensor has an error (*)
If used as a regulation sensor, the elements
being controlled are disabled.
.
EO3
AI3 sensor has an error (*)
If used as a regulation sensor, the elements
being controlled are disabled.
.
EOH
Internal humidity sensor (*)
If used for humidity control, the humidity
detected is set to 0.
.
LILt
Low temperature limit
see paragraph
“14. Supply limits function with
fixed-point control” page 33
.
LIHt
High temperature limit
see the limits paragraph
“14. Supply limits
function with fixed-point control” page 33
.
LILH
Low humidity limit
Dehumidifier OFF
LIHH
High humidity limit
Humidifier OFF
ALU
Fans
Activation of digital output for fan alarms if
configured
025
=18 (DO1) or
026
=18 (DO2)
or
027
=18 (DO3) or
028
=18 (DO4) or
029
=18
(DO5)
ECL
Clock
Just an indication, no effect on control.
(*) If the sensors used for the controller are faulty (open or in short circuit), the valve and/or electrical resistances are
deactivated, the free cooling/heating is deactivated (if in operation) and the bypass damper is set to off.
Example:
001
=0,
015
=1 and
106
=75, sensor
AI1
used as a remote sensor in combination with the internal sensor.
If the sensor
AI1
is broken, the operating sensor becomes the internal sensor, regardless of the value of parameter
106
.
If the internal sensor is broken, the operating sensor becomes the sensor
AI1,
regardless of the value of parameter
106
.
If both are broken, the operating sensor cannot be determined. Regulation is stopped.
If parameter
193
or
194
is set to 6, the corresponding operating setpoint is shown on the display. If the operating temperature
cannot be calculated (sensor open or in short circuit), “
---
” is shown on the display.
For sensors used as external sensors in the event of a sensor failure, the heating compensation setpoint function is not
blocked:
• in the event of a short circuit on the sensor, the temperature is considered to be high and setpoint
134
is used as the
compensated setpoint.
• in the event of an open sensor, the temperature of the sensor is considered to be low and the setpoint
133
is used as the
compensation setpoint (see paragraph
“15. Control with setpoint compensation” page 37
).
For sensors used as external sensors, in the event of a sensor failure, the cooling compensation setpoint function is not
blocked:
• in the event of a short circuit on the sensor, the temperature is considered to be high and setpoint
138
is used as the
compensation setpoint.
• in the event of an open sensor, the temperature of the sensor is considered to be low and the setpoint
137
is used as the
compensation setpoint (see paragraph
“15. Control with setpoint compensation” page 37
).
If a sensor is used as a supply sensor, in the event of failure the functions of this sensor are blocked. If the limit functions are
enabled, these are not taken into consideration.
If the temperature sensor displayed on
display A
is in alarm, the following screen is displayed if the sensor is open:
-LL
or
-HL
if the sensor is in short circuit.
