Daikin AGZ 025D Operating & Maintenance Manual page 30

Transitions between these states are shown in the following diagram.
T1 – Off to Preopen

No compressors are running and any compressor on circuit is commanded to start (see unit capacity
control)

T2 – Preopen to Run

5 seconds has passed
T3 – Run to Pumpdown
Any of the following are required:

Last compressor on circuit is commanded to stop

Unit State = Pumpdown

Circuit switch is open

Circuit mode is disable

Circuit Pumpdown alarm is active
T4 – Pumpdown to Off
Any of the following are required:

Evaporator Pressure < Pumpdown Pressure Value

Unit State = Off

Circuit Rapid Stop alarm is active
T5 – Run to Off
Any of the following are required:

Unit State = Off

Circuit Rapid Stop alarm is active

A low ambient start attempt failed
T6 – Preopen to Off
Any of the following are required:

Unit State = Off

Unit State = Pumpdown

Circuit switch is open

Circuit mode is disable

Circuit Rapid Stop alarm is active

Circuit Pumpdown alarm is active
30
POWER
OFF
ON
PUMPDOWN
AGZ 025D through 190D
PREOPEN
T 6
T 2
RUN
T 3
OMM 1166-1