Mitsubishi Electric PURY-P72 Service Handbook page 151

[VII
Control]
·12· Control Method
The control system configuration for the PURY models is shown in the chart below.
Data signal exchange
Non-polar 2-wire [ Daisy-chained ]
between system equipment
serial communication non-polar 2-wire -
r -
method
transmission line
"'C
0
~
iV
16-bil CPU
E
Calculation, processing microcomputer operation
e
processing
'E
0
u
-
System control
*
• Adjustment of refrigerant flow rate
Autonomous distributed
• Adjustment of rotation speed of
-
compressor or fan
control system
(F2-VPM control)
Rotation speed control of compressor
or fan depending on the refrigerant
Outdoor unit
pressure value and the changing speed
~I
I
Self-contained capacity control depending
Indoor unit
on the load
Refrigerant distribution control depending
BC controller
on the operation mode
Autonomous distributed control system: A system that consists of three independent sub control systems,
instead of a single centralized control system, that work together
to maintain the overall control of the entire system.
HWE0803A - 141 - GB