Pressure Safeties - Daikin EWWQ-AJYNN Service Manual

ESIE07-05
2.20

Pressure Safeties

2.20.1 Transducer high pressure alarm
Introduction This is a software safety function. When high pressure is near to the high pressure switch setpoint, the
unit will shutdown and trip on transducer high pressure alarm.
Function
description
■
■
■
Transducers High
Pressure Alarm
Setpoint
Diff.
Part 2 – Functional Description
HP
Setpoint
20.5
15.5
When the pressure is above the HP setpoint, the unit will go into HP alarm.
When the high pressure alarm is activated and the HP sinks below HP setpoint-diff, it is possible
to reset the transducer high pressure alarm.
When the high pressure rises above the high pressure switch setpoint (21.5 bar), the unit will go
into alarm and a manual reset on the high pressure switch is needed.
HP Alarm
If HP is below
this value
Time
20.5 bar
5.0 bar
Functional Control
1
2
3
4
possible
to reset
5
2–75