Technical specification
5
10
Connection key PC1004
Designation
Description
RLY1
Control signal to compressor relay (230 VAC)
OUT2
Control signal to circulation pump (230 VAC)
OUT3
Control signal to four way valve (230 VAC)
OUT4
Control signal to fan motor (230 VAC)
OUT5
Control signal, not used (230 VAC)
AC-N1
Neutral conductor (230 VAC)
CN2
RS485 communication to inverter board
CN8
RS485 communication to display
CN9
Control signal, electronic expansion valve
CN11
Not used
CN13
Not used
A1
External On/Off switch (digital input)
A2
Flow switch (digital input)
A3
Low pressure pressostat signal (digital input)
A4
High pressure pressostat signal (digital input)
A5
Suction gas temperature (analogue input)
A6
Incoming water temperature (analogue input)
A7
Outgoing water temperature (analogue input)
A8
Evaporator coil temperature (analogue input)
A9
Outdoor temperature (analogue input)
A10
Not used
A11
Not used
A14
Hot gas temperature (analogue input)
A13
Low pressure sensor (analogue input)
CN9
3
RLY1
OUT2
OUT3
A
C-N1
OUT4
OUT5
CN2
PC1004
CN8
4
CN13
A1
A3
A5
A7
A9
A11
A4
A6
A8
A10
A12
A2
CN11
A13
GND
GND
GND
GND
+12
V
0~10V
-OUT
PWM
-IN
PWM
-OUT
5V