Technical specification
5
No.
Designation
Description
3
AC-N
Neutral conductor (230 VAC)
4
AC-L
Phase conductor (230 VAC)
5
COMP1
Control signal to compressor relay (230 VAC)
6
COMP2
Control signal to compressor relay (230 VAC)
7
VAL1
Control signal to four way valve (230 VAC)
8
VAL2
Control signal to four way valve (230 VAC)
9
FAN
Control signal to fan motor (230 VAC)
10
PUMP
Control signal to circulation pump (230 VAC)
11
HEAT
Alarm signal (230 VAC)
12, 14
KYOUT/GND
On/Off switch (output signal, not connected)
13, 14
MDOUT/GND
Mode output (not connected)
15-17
NET/GND/12V
Display controller
18, 20
KYIN/GND
On/Off switch (input signal, not connected)
19, 20
MDIN/GND
Mode input (not connected)
21-22
WATER/GND
Flow switch (input signal)
23-24
FROST/GND
Defrosting signal (not connected)
25-27
SYS/GND/12V
Pressostat signal (input signal)
28
INTWT
Incoming water temperature (input signal)
29
OUTTWT
Outgoing water temperature (input signal)
30
PIPE1
Evaporator coil temperature (input signal)
31
PIPE2
Discharge gas temperature (input signal)
32
ROOMT
Ambient temperature (input signal)
49
H
EA
T
G
N
D
G
N
D
12
V
G
N
D
G
N
D
G
N
D
G
N
D
12
V
CHILLER 300.2
PU
M
P
FA
N
VA
L2
VA
L1
CO
M
P2
CO
M
P1
A
C
-L
A
C
-N
A
C
-N
A
C
-N
KY
O
U
T
M
D
O
U
T
N
ET
KY
IN
M
D
IN
W
AT
ER
FR
O
ST
SY
S
SE
N
SO
R
RO
O
M
T
SE
N
SO
R
PIP
E2
SE
N
SO
R
PIP
E1
SE
N
SO
R
O
U
TW
T
SE
N
SO
R
IN
W
T
Connection key Chiller 300.2
