EEV21
FAN21
Indoor unit1
Outdoor unit
HEX21
GAS LINE
(High pressure)
LIQUID LINE
GAS LINE
(Low
pressure)
TH21
TH22
TH24
ACM
CMP1
(INV)
OS
SCHEX
HPS
FAN1
LPS
SV1
EEV2
EEV1
EEV3
TH1
TH2
TH3
HEX1
HEX2
TH10
TH4
TH5
TH6
TH9
TH7
RCV
TH8
4WV 1
4WV 2
TH11
SV3
SV2
HPSW1
CMP
ACM
SV4
: Capillary
: Strainer
RB unit1
SVD1
SVB2
SVB1
SVS1
SVS2
02-01
2-1 REFRIGERANT CIRCUIT
1 Compressor temp. Sensor 1 Detects the compressor temperature
No. Part name Function
2 Discharge temp. Sensor 1 Detects the discharge temperature
High pressure Switch Detects abnormal high pressure 609 psi (4.20 MPa)3
4 Check valve Comp. pressure equaization
Oil Separator Separates oil and refrigerant5
6 Compressor (Inverter) Operation range ( 20 rps - 115 rps )
7 Bypass / Oil return Valve HP-LP bypass in protection, Returns the oil to COMP
8 Oil return Valve Returns the oil to Compressor
9 High pressure Sensor Detects the High pressure
10 Bypass Valve
HP-LP bypass in protection / Comp. pressure equalization
11 Suction gas temp. Sensor
Collects refrigerant and the returned oil
12 Low pressure Sensor
Detects the temp of refrigerant
13 Accumulator
Detects Low pressure
14 4-Way-Valve 1 Changes operation mode of HEX 1
Changes operation mode of HEX 2
4-Way-Valve 215
16 Service port Measure High pressure for Service
17 Heat-Ex 1 gas temp. Sensor Detects the temperature of refrigerant
Heat-Ex 2 gas temp. Sensor Detects the temperature of refrigerant
18 Heat Exchanger 1 Operates as Condenser / Evaporator
Heat Exchanger 2 Operates as Condenser / Evaporator
19
20
21 Outdoor unit FAN (Motor) Control FAN speed for heat exchange of HEX
22 Outdoor temp. Sensor Detects the ambient temperature
23 Heat-Ex 1 liquid temp. Sensor Detects the temperature of refrigerant
Heat-Ex 2 liquid temp. Sensor Detects the temperature of refrigerant24
25 Pressure regulation valve Operates in regulated pressure 580 psi (4.00 MPa)
26 Outdoor unit EEV1 Controls the flow of ref. based on target pressure
27 Outdoor unit EEV2 Controls the flow of ref. based on target pressure
Receiver tank Storage extra refrigerant28
29 Liquid pipe temp. Sensor 1 Detects the temperature of liquid refrigerant
Outdoor unit EEV3 Controls ref. subcooling /Operates in protection30
31 Sub-Cool Heat exchanger Subcool of liquid refrigerant
32
Sub-Cool HEX gas outlet temp
Sensor
Detects the temperature of refrigerant
33 Liquid pipe temp. Sensor 2 Detects the temperature of liquid refrigerant
34 High pressure gas cut valve Shut off High pressure gas line in all Cooling mode
35 3way-valve (High pressure Gas) Open / Close for High pressure Gas line
36 3way-valve (Liquid) Open / Close for Liquid line
37 3way-valve (Low pressure Gas) Open / Close for Low pressure Gas line
38 Service port Measure Low pressure for Service
39 I.U HEX outlet temp. Sensor Detects the temperature of refrigerant
Detects the temperature of room
Room temp. Sensor40
41 Indoor unit FAN (Motor) Controlled by setting / protection / Thermo OFF
42 I.U Heat Exchanger Operates as Condenser / Evaporator
Indoor unit EEV Controlled by setting / protection / Thermo OFF
43 I.U HEX inlet temp. Sensor Detects the temperature of refrigerant
SVD1 (Discharge) Opens in Heat / Vacuum mode
44
45
46 SVB2 (Pressurization) Opens in Heat / Vacuum mode
47 SVS1 (Suction 1) Opens in Cool / Dry / Defrost / Oil-Recovery / Vacuum
48 SVS2 (Suction 2) Opens in Cool / Dry / Defrost / Oil-Recovery / Vacuum
Check valve Shut off opposit refrigerant flow49
50 SVB1 (Decompression) Opens in Stop / FAN / same as the function of SVS
Function
Part name
No.
2. OUTDOOR UNIT
: Fusible plug
Operation temp. 165 F (75 C )
FP
FP
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