Daikin EWAP460MBYN [232/452] High pressure setback

Functional Control for a Standalone Unit ESIE05-07

2–36 Part 2 – Functional Description

2.7.3 High pressure setback

Description This is a safety prevention function, when high pressure is near to the high pressure switch setpoint.

The unit will load-down to prevent that the unit trips on high pressure switch the unit will loaddown.

Function

P Loadup not possible area: If high pressure is above HP setback -0.3 bar then loadup is not

possible.

P HPSetback area:

If high pressure is above HP setback then loaddown10 sec. is executed each sampling time

(def 12s).

If high pressure is above HP setback then compressor status in readoutmenu is blinking.

Remark: The maximum high pressure depends on the type of refrigerant:

P HP setback for R407c is default 24.5 bar.

P HP setback for R134a is default 16.5 bar.

HPSetback

St1HPSTBD (def 0.3b)

(=def 24.2 b)

HPSetback

(=def 24.5 b)

HP [bar]

Time

HP setback area

(loaddown 10s each sampling time 12sec)

Loadup not possible area

ESIE05-07.book Page 36 Wednesday, October 11, 2006 10:42 AM