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K2
L
N
1
2
TO POWER
TO
TC
SUPPLY
PUMP
220-240V~/50Hz
AT：Ambient temperature
COMP：Compressor
CT：Coil temperature
EEV：Electronic expand valve
EP：Exhaust protection
ET：Exhaust temperature
FM：Fan motor
FS：Flow switch
HP：High pressure protection
IT：Inlet water temperature
K2：Relay of pump
LP：Low pressure protection
OT：Outlet water temperature
SUT：Suction temperature
TC：Transformer
4V：4 way valve
K2
L
N
1
2
TO POWER
TO
TC
SUPPLY
PUMP
220-240V~/50Hz
AT：Ambient temperature
COMP：Compressor
CT：Coil temperature
EEV：Electronic expand valve
ET：Exhaust temperature
FM：Fan motor
FS：Flow switch
HP：High pressure protection
IT：Inlet water temperature
K2：Relay of pump
LP：Low pressure protection
OT：Outlet water temperature
SUT：Suction temperature
TC：Transformer
4V：4 way valve
Dura Pro 21
21
N
3
5
1
01
2
4
6
CN7
CN9
J2
24V
Pressure sensor
1 2 3 4
（SUT）
t
ET
N
3
5
1
01
2
4
6
CN7
CN9
J2
24V
t
ET
Pressure sensor
（SUT）
N
7
8
L
1
3
5
02
2
4
6
K2
4V
GND
RLY1
485B1
CN2
485A1
GND
485B2
CN8
485A2
t
t
t
t
t
CT
OT
IT
SUT
HP
LP
FS
AT
EP
N
7
8
L
1
3
5
02
2
4
6
K2
4V
GND
RLY1
485B1
CN2
485A1
GND
485B2
CN8
485A2
t
t
t
t
t
CT
OT
IT
SUT
HP
LP
FS
AT
7
8
YEL
4
BLK
RED
12V
BLK
YEL
4
WHT
RED
12V
Controller
FM
：
7
8
YEL
BLK
4
RED
12V
BLK
YEL
4
WHT
RED
12V
Controller
FM
Remote
ON/OFF
：
L
N
DCFAN1
A B GND 12V
RED BLK WHT
U V W
V
U
W
COMP
L
N
CON1
A B GND 12V
U V W
V
U
W
COMP
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