11.1 Alarm signaling and monitoring
11.1.1 Coldroom door open alarm
Controller type UR 141 NE, UR 141 TE
Alarm is generated if the coldroom door remains open for an adjustable time.
In the event of a permanently open door, an alarm is activated and the controller returns to cooling following
theelapseoftheadjustablealarmdelaytime.
11.1.2 High or low temperature alarm
Alarm is generated due to high or low temperature if the set alarm temperature is obtained on a supply air or
return air sensor and the set time delay has expired.
Standard settings
The high temperature setpoint is entered in C while the low temperature setpoint is entered as the difference to
the cooling setpoint in K. High and low temperature setpoints can be set separately for each temperature zone.
The time delay is common to all. With controller type UA 141 E the return air coolers are monitored only for the
low temperature setpoint. With all other controller types no differentiation is made between sensor type for
alarm.
Advanced settings
Controller types UA 121, UA 131, UA 131 DD
For the supply air sensor an optional warning value can be used. In this case a separate alarm message is
generated if the supply air exceeds this warning value.
In general, the case controller employs a common high temperature warning value for the supply and return air
sensors. In special cases it may be desirable to configure a separate warning value for the supply air sensor
(menu 2-4-1.. 2-4-4).
As soon as the parameter “Temp.alarm.”issettoavalueotherthan“--“,thecontrolleremploystheseparate
warning values for supply and return air.
This alarm is deactivated during defrosting. Any time delay that has expired in the meantime is reset at
the start of defrosting and recommences at zero on completion of defrosting.
Theparameter“Temp.alarm”mustbesettothevalue“--“(factorysetting).
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