Firmware V3.13
21.04.2021
457/466
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11.1.5 Alarm in the event of the minimum permitted superheat being undershot
An alarm signal is sent when the limit value ”Minimum Superheat” is undershot following the end of the
10 minute delay time and the opening degree was greater than 0%.
11.1.6 Sensor break alarm
Alarm is generated after the set time delay if the controller detects sensor break or short circuit (menu 6-2-3).
The sensor failure message also applies to the pressure transmitter configured via parameters AIN1 activ
i.e. AIN2 activ (menu 6-2-6) and is triggered after a set time delay of one minute. For sensor failures on the
temperature sensors the set time delay continues to apply (menu 6-2-3).
11.1.7 Suppression of sensor break alarm during defrosting
While defrosting is in progress, temperature sensors and particularly the evaporator sensors may
become heated to a temperature above the limits of the case/coldroom controller's temperature detection
range. Sensor break alarm is accordingly suppressed for the duration of defrosting so as to avoid signalling of
false alarms.
The following conditions apply:
Sensor break alarm effective prior to defrosting is
NOT
suppressed.
Sensor break alarm takes place with the set delay during any drain time that may be defined.
Sensor break occurring during defrosting and persisting beyond termination of defrosting is alarmed when
the set delay expires.
Sensor break alarm suppression is effective with all types of defrost (internal, external, discharge gas,
manual
and master/slave defrosting).
With internal and manual defrosting, sensor break alarm is suppressed for the complete safe defrost time
regardless of defrosting terminating before that.
Sensor break alarm is always generated in the case of sensors required for control functions. Sensor
break is only alarmed on optional sensors when these sensors are not removed from monitoring by
sensor scan (Menu 6-1).
In the most unfavorable instance, sensor break alarm is merely postponed. The longest possible delay
would be ( 2 * T
Sensor break delay
) + T
Defrost
If the delay time for the sensor failure alarm is set to zero minutes there is no alarm suppression and
the alarm is generated immediately following detection of the sensor failure.
This setting is
not
recommended for the continuous operation of the controller!
Содержание Case Controller UA 4 E Series
Страница 23: ...Firmware V3 13 21 04 2021 23 466 For more details see chapter Operation UA 4xx E...
Страница 135: ...Firmware V3 13 21 04 2021 135 466 Exit the menu by tapping the ESC button twice...
Страница 157: ...Firmware V3 13 21 04 2021 157 466 Connection diagram UA 400 E CC One zode controller and two zone controller...
Страница 158: ...Firmware V3 13 21 04 2021 158 466 Anschlussbild UA 401 E CC One zode controller...
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Страница 216: ...Firmware V3 13 21 04 2021 216 466 SENSORS POS XXXXX Entry Default 5K3A1 Temperature range 0 100 C...
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Страница 364: ...Firmware V3 13 21 04 2021 364 466 MODE POS XXXXX Entry Default Fixed run time Enthalpy ctrl rtm...