Daikin UATYA-B, Руководство по эксплуатации

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Service manual Daikin R32 Rooftops UATYA-B
ESIE21-02 – 2021.03
4.2.4 Return temperature alarm
The controller always checks that the return air temperature values are within the required operating range.
The parameters involved are shown in the table.
The values of the parameters are representative. In specific cases, different values can be set.
Parameter Value UM Description
PAL82 35.0 °C Return air - High temperature threshold
PAL83 5.0 °C Return air - High temperature differential
PAL84 15.0 °C Return air - Low temperature threshold
PAL85 5.0 °C Return air - Low temperature differential
PAL86 60 - Return air - Max. number of alarms per hour
High return air temperature alarm
Alarm code AL28
Reason for activation
When the temperature value measured by the probe on the return line is greater than the
setpoint in parameter “PAL82”
Reset
When the temperature value measured by the probe on the return line is lower than the
difference between “PAL82” and “PAL83”
Reset mode Automatic; switches to manual after the trip occurrences per hour set in “PAL86”
Alarm icon Flashing
AlarmLog Yes
Alarm relay Based on “alarm.conf” file
Devices Behaviour in the event of an alarm
All devices They follow their control
Low return air temperature alarm
Alarm code AL29
Reason for activation
When the temperature value measured by the probe on the return line is lower than the
setpoint in parameter “PAL84”
Reset
When the temperature value measured by the probe on the return line is greater than the
difference between “PAL84” and “PAL85”
Reset mode Automatic; switches to manual after the trip occurrences per hour set in “PAL86”
Alarm icon Flashing
AlarmLog Yes
Alarm relay Based on “alarm.conf” file
Devices Behaviour in the event of an alarm
All devices They follow their control
Limitation of air temperature in return line active
Alarm code AL26
Reason for activation
When the temperature value measured by the probe on the return line is lower than the
setpoint in parameter “ST21”.
Reset
When the temperature value measured by the probe on the return line is greater than the
sum of “ST21” + “ST22”.
Reset mode Automatic
Alarm icon Flashing
AlarmLog Yes
Alarm relay Based on “alarm.conf” file
Devices Behaviour in the event of an alarm
Dehumidification demand It follows the function designed to limit the air temperature in the return line.
4 Alarms