Unit Load Limiting - Daikin EWWQ-AJYNN Service Manual

Functional Control
2.8

Unit Load Limiting

1
Introduction
2
Load limiting
3
4
5
2–60
The Unit load limiting function finds application in all those situations when it is necessary to reduce
the electric absorption of the unit, in determined periods of the day.
It is possible to limit the unit absorption using one of the two options available under user menu.
■ The first way, called "Demand Limit" requires a 40mA - 20mA external signal (connections 37 and
38 on M3). The unit max load decreases from 100% to 0% as the input increases from 4mA to
20mA.
Unit max load
100 %
0 %
4mA
Unit Limiting
Demand Limit
■
The second way, called "Current Limit" needs a direct measure of the current absorbed by the unit
and the set of the maximum current to be absorbed. (Option: SPN unit)
Remark: Current limit screen appears only if b8 probe is enabled under maintenance menu.
Unit Limiting
Current Limit
Current Limit Set
4m A
20 mA
Max Curr.
20mA
000 A
400 A
300 A
ESIE07-05
External signal
Part 2 – Functional Description