Daikin Altherma HT - Digital I;O PCB (Option PCB A7 P)

ESIE09-08B PCB Layout for EKHBRD 011/014/016 AA/AB/AC/AD V1/Y1
Refrigerant Circuit 43
2.8 Digital I/O PCB (Option PCB A7P)
Digital I/O PCB (option PCB A7P)
Digital I/O PCB (option PCB A7P)
X1
X2A / CN2
X2
X3
X4
YCX1A Y1
X1A
X1M
X2M
F1U
ON
YC Y1 Y2 Y3 Y4
OFF
SS1
F2U
X2A/CN2
X1 X2 X3 X4
Connector Color Connected to - function
X1A White X2M [6 - 7]
X2A White X33A of main PCB (A1P)
X1 -
Cooling/heating ON/OFF output
(optional power supply)
X2 -
X3 -
Alarm output (optional power
supply)
X4 -
Y1 - YC - Domestic hot water mode ON/OFF
output
Y3 - YC - Solar priority