Service Manual

Refrigerant Flow for Each Operation Mode SiUS181631EA
48 Refrigerant Circuit
3.3 Cooling Oil Return Operation
EVH : Full closeEVC : 56 pulseEVB : SH control
OUTDOOR UNIT INDOOR UNIT
FILTER FILTER
EV
H
EV
C
EV
B
EV
A
FILTER FILTER FILTER
FILTER FILTER
EV
H
EV
A
EV
B
FILTER FILTER
FILTER FILTER
EV
H
EV
A
EV
B
FILTER FILTER
FIELD PIPING
FIELD PIPING
SIROCCO FAN SIROCCO FAN SIROCCO FAN SIROCCO FAN SIROCCO FAN SIROCCO FAN SIROCCO FAN
FAN MOTOR
M
HEAT EXCHANGER
M M
M
M M
M
BP UNIT
(R15418)
EVA : 56 pulse EV
H : SH controlEVB : 56 pulse
EV
H : Full closeEVB : 56 pulse
EV
A : SH control
EV
A : SH control
FIELD PIPING
FIELD PIPING
FAN MOTOR
HEAT EXCHANGER
FIELD PIPING
FIELD PIPING
FAN MOTOR
HEAT EXCHANGER
FIELD PIPING
FIELD PIPING
FAN MOTOR
HEAT EXCHANGER
FIELD PIPING
FIELD PIPING
FAN MOTOR
HEAT EXCHANGER
FIELD PIPING
FIELD PIPING
FAN MOTOR
HEAT EXCHANGER
FIELD PIPING
OFF OFF OFF OFF
ON ON ON
FIELD PIPING
FAN MOTOR
HEAT EXCHANGER
ELECTRONIC
EXPANSION VALVE (BYPASS)
ELECTRONIC
EXPANSION VALVE (ROOM A)
ELECTRONIC
EXPANSION VALVE (ROOM B)
LIQUID SIDE
THERMISTOR (DLA)
LIQUID SIDE
THERMISTOR (DLB)
GAS SIDE
THERMISTOR (DGA)
GAS SIDE
THERMISTOR (DGB)
ELECTRONIC
EXPANSION VALVE (BYPASS)
ELECTRONIC
EXPANSION VALVE (ROOM A)
ELECTRONIC
EXPANSION VALVE (ROOM B)
LIQUID SIDE
THERMISTOR (DLA)
LIQUID SIDE
THERMISTOR (DLB)
GAS SIDE
THERMISTOR (DGA)
GAS SIDE
THERMISTOR (DGB)
ELECTRONIC
EXPANSION VALVE (ROOM A)
ELECTRONIC
EXPANSION VALVE (ROOM B)
ELECTRONIC
EXPANSION VALVE (ROOM C)
GAS SIDE
THERMISTOR (DGA)
GAS SIDE
THERMISTOR (DGB)
GAS SIDE
THERMISTOR (DGC)
LIQUID SIDE
THERMISTOR (DLA)
LIQUID SIDE
THERMISTOR (DLC)
LIQUID SIDE
THERMISTOR (DLB)
ELECTRONIC
EXPANSION VALVE (BYPASS)
SV
SV
SERVICE PORT
FILTER
FILTER
FILTER
FILTER
FILTER
HEAT EXCHANGER
COMPRESSOR
ACCUMULATOR
: High pressure liquid refrigerant : High pressure high temp. gas refrigerant : Low pressure low temp. liquid or gas refrigerant
SOLENOID VALVE (Y2S)
HIGH PRESSURE SENSOR
Oil
separator
FOUR WAY VALVE
SERVICE PORT
PRESSURE REGULATING VALVE
CAPILLARY TUBE
HIGH PRESSURE SWITCH
CAPILLARY TUBE
SOLENOID VALVE
LOW PRESSURE SENSOR
CAPILLARY TUBE
GAS LINE STOP VALVE
LIQUID LINE STOP VALVE
ELECTRONIC EXPANSION VALVE (Y1E)
DOUBLE PIPE HEAT EXCHANGER
ELECTRONIC EXPANSION VALVE (Y3E)
Y1E Y3E Y2S
480 pulse Full close OFF
HEAT EXCHANGER THERMISTOR HEAT EXCHANGER THERMISTOR HEAT EXCHANGER THERMISTOR HEAT EXCHANGER THERMISTOR
HEAT EXCHANGER THERMISTOR
HEAT EXCHANGER THERMISTOR
HEAT EXCHANGER THERMISTOR