SiEBE18-526
BP Unit Control
Function
77
6.2.3 Full Closing of Electronic Expansion Valves
Purpose of the
Function
The electronic expansion 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 electronic expansion valve initialization signal to outdoor unit.
3. Closes the electronic expansion valve of each chamber (sets the electronic expansion valve
pulse to 0).
4. Stops transmission of electronic expansion valve initialization signal when EVH retightening
is completed.
6.2.4 Control Based on EV Opening Command from Outdoor Unit
Purpose of the
Function
This function operates the electronic expansion valve based on EV opening command sent from
the outdoor unit.
Outline
The electronic expansion valve operation based on EV opening command provides the
following functions.
1) Pressure equalization prior to startup
2) Startup control
3) Restart standby
4) Pump-down residual operation
5) Oil return operation
6) Defrost operation
Power ON
P 1
P 1
0
0
P 1
0
P 1
0
EVA
EVB
EVC
EVH
(M1047)
Summary of Contents for Super Multi Plus D-Series
Page 1: ...SiEBE18 526 D Series Service Manual Applied Models zSuper Multi Plus Heat Pump...
Page 12: ...SiEBE18 526 List of Functions 1 Part 1 List of Functions 1 List of Functions 2...
Page 63: ...Refrigerant Flow for Each Operation Mode SiEBE18 526 52 Refrigerant Circuit...
Page 249: ...Instruction SiEBE18 526 238 System Configuration...
