ULTRA 4 INSTRUCTION MANUAL 
 
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P979 End Month 
This parameter is used to select the month, in which Daylight-Saving Time 
will end.  
Service Alarm 
An alarm can be raised if the Ultra 4 or the application is due for a service. 
P195 Interval 
This parameter allows a repeat interval (in days) to be set to indicate the 
time between each service.  When a service alarm is triggered and reset by 
using P199, the new service alarm will activate by the amount of days set in 
this parameter.  For example, if 365 has been entered, then after a reset is 
done the new alarm will automatically be set to activate in 365 days’ time. 
At midnight, every day on the unit the interval will reduce until the service 
alarm is due.  The service alarm relay that is programmed (details of how to 
do this are shown in Relays > Alarms section of this manual), changes state 
and the square indicator will become solid black.   
And when activated a message will appear on the display indicating a service 
is due, and will display the following message on the Main run mode screen: 
Service due. Call 01684 891371