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HWE09080 GB
-15- Control Method <PQRY only>
The control system configuration for the PQRY models is shown in the chart below.
Control method
Data signal exchange
between system equipment
Calculation, processing
System control
Adjustment of refrigerant flow rate
Adjustment of rotation speed of
compressor or fan
Non-polar 2-wire
serial communication
method
16-bit CPU
microcomputer operation
processing
Autonomous distributed
control system
(F2-VPM control)
Rotation speed control of compressor
or fan depending on the refrigerant
pressure value and the changing speed
Self-contained capacity control depending
on the load
Refrigerant distribution control depending
on the operation mode
Heat source unit
Daisy-chained
non-polar 2-wire
transmission line
Indoor unit
BC controller
*
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.