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5.6 Control board
CPU board description
Location of connector and terminal blocks
TERMINAL BLOCK J12
Supply from PSU board
to control board
(neutral and phase)
5 4 3 2 1
5 4 3 2 1
TERMINAL BLOCK J2
1-2
Control terminal
(12 V)
3
Heating/Cooling - Unoccupied control
4
On/Off - bypass input
5
Common
Provide a good-quality contact certi-
fied for an input current of
10 mA at 24 V
(Nos. 5, 4 and 3)
TERMINAL BLOCK J1
1
auxiliary output 1
2
auxiliary output 2
3
auxiliary output 3
4-5
230 V phase inputs
Flashing green LED
- Terminal/control board
communication
Flashing red LED
- Temporary fault
Steady red LED
- Permanent fault
¤
green LED
¤
red LED
S1
10 k
Ω
sensor positioon
50 k
Ω
sensor position
1
2
1
2
3
4
The potential-free contacts operate correctly if:
Outputs (
(
): at 5 V-10 mA min. and 230 V-5 A AC1 max.
EARTH
N Ph
3-4
Alarm signal
output
1-2
Heat trace cable
output
4
3
2
1
4
3
2
1
3
2
1
4
reversing valve
control
3
compressor
control
2
circulator
control
1
neutral, circulator
control
3
Condensate drain
pan heater cable
control
2
not connected
1
fan speed control
TERMINAL BLOCK J11
1 to 4
Daughter board
TERMINAL BLOCK J10
1-2
Coil freon sensor
TERMINAL BLOCK J9
1-2
Outdoor air sensor
TERMINAL BLOCK J8
1-2
Water outlet sensor (
water supply)
TERMINAL BLOCK J7
1-2
Water inlet sensor
(water return)
TERMINAL BLOCK J6
1-2
Plate exchanger freon sensor
TERMINAL BLOCK J16
Program loading
TERMINAL BLOCK J4
1-2
Flow rate controller
TERMINAL BLOCK J3
1-2
3-4
HP PSU board link
TERMINAL
BLOCK
J15
TERMINAL
BLOCK
J14
TERMINAL
BLOCK
J13
