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The third parameter for each relay determines the alarm ID for the relay
you wish to set.
P212, 222 - Relay Alarm ID
When P211, P221 = 3 (Loss of Echo) or 4 (Loss of Clock)
This parameter has no function and will not be displayed.
When P211, P221 = 1 (Level) or 2 (Temperature)
This parameter defines which alarm type, the relay should respond to, as
follows.