Daikin EWAD900BJYNN/A [253/346] On off fans phase cut opla management

ESIE07-04 Functional Control

Part 2 – Functional Description 2–113

3.25.4 On/off fans + phase cut (OPLA) management

Function

description

The logic of regulation of this system is only present in the units with OPLA and is similar to the two

previously described functions. The speed regulator is applied only to some fans while the others are

controlled with the steps system. Such system allows the operation of the units in very low air

temperatures without the necessity to install complex and more expensive solutions.

3.25.5 Fan silent mode

Function

description

This function is only available when the unit is equipped with VFD fans.

The fan silent mode function allows to reduce the unit noise limiting the maximum fan speed according

to a time schedule. The function may operate only if a continuous speed regulation is adopted. Its

parameters may be set under “User” password. The function is bypassed anytime the condensation

pressure exceeds the condenser pressure stage hold threshold.

This function will allow to limit the maximum fan speed in certain periods of a day or some days of the

year. It is accessible under the user menu and bypass in case of high pressure problems (stage hold

or stage down).

Fan Silent Mode S

Max Inv. Out 06.0 V

_FSM Monday–Friday

Stop

1st 06:00

2nd

Start

00:00

18:00 23:59

_ FSM Saturday

Stop

23:591st

2nd

Start

00:00

14:00 00:00

FSM Force On Days (1)

00/00 00/00

FSM Force On Days (2)

00/00 00/00

00/00

00/00 00/00