Daikin EWWQ-AJYNN Service Manual page 78

Functional Control
1
Pulse time
2
3
4
Graph 1
5
2–72
The time of the pulse time is fixed (default 0.3 s). The interval time between two pulses is proportional
to the PID (proportional + integral + derivative) unit request.
Fixed
Compressor Unloading
Pulse Time
Min Pulse Period
Max Pulse Period
Compressor Loading
Pulse Time
Min Pulse Period
Max Pulse Period
A pure proportional logic will load or unload with a frequency related to the set-point distance.
Pulse time
Minimum loading
pulse time
Max loading
pulse time
No pulse,
stand-by
Max unloading
pulse time
Minimum unloading
pulse time
Variable
00.3 s
01 s
90 s
00.3 s
05 s
90 s
Set Point
Dead band
Regulation band
ESIE07-05
upload/download pulses
Evap water
leaving
Part 2 – Functional Description