Si18-201 System control
Main Functions 153
3.28.4 Full Closing of Motorized Valves
Purpose of the
Function
The motorized valves are initialized when the power is turned on.
Details The following processes are conducted.
1. Conducts P1 pulses close when power is turned on, and sets current opening to 0 pulse
(fully closing process).
2. Sends motorized valve initialization signal to outdoor unit.
3. Closes the motorized valve of each chamber (sets the motorized-valve pulse to 0).
4. Stops transmission of motorized valve initialization signal when EVH retightening is
completed.
3.28.5 Control Based on Absolute Flow Rate Instruction
Purpose of the
Function
This function operates the motorized valve based on the absolute flow rate instruction sent from
the outdoor unit.
Outline The motorized valve flow rate operation based on the absolute flow rate instruction provides the
following functions.
1) Flow rate distribution for motorized valves of individual room units.
2) Retightening based on retightening instruction from outdoor unit.
3) Operation of motorized valves during oil recovery operation.
Power ON
P 1
P 1
0
0
P 1
0
P 1
0
EVA
EVB
EVC
EVH
(M1047)
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