Stulz EC Tower ECD 91 - 6.4 Digital input assignment in Program 8; 6.6 Digital output assignment in Program 8

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ec tower technical manual
6.5 Digital input assignment in Program 8
Input Function Description
X2a-D1 Remote ON/OFF
The indoor unit or group of indoor units can be switched on and off via the digital input.
DIP switch S25 enables forced mode (see “4.2.2 Remote ON/OFF“ on page 150).
X2a-D2 Cooling/Heating mode
If a signal is present, the air conditioning unit runs in Cooling mode. If no signal is present,
the air conditioning unit runs in Heating mode.
X2b-D3 Center/Center-Remote

-
ate in Center-Remote mode.
X2b-D4 Analog input evaluation
Analog input X3S is only evaluated if a signal is present at X2b-D4 (see “3.1.1 Analog
input“ on page 146). If there is no signal, a setpoint can be specified via the wired
remote control.
X2b-D5 Not enabled in the EC Tower
X2c-D6 Not enabled in the EC Tower
X2b-D5
and
X2c-D6
Not enabled in the EC Tower
6.6 Digital output assignment in Program 8
Output Function Description
X4a-K1 Alarm signal
All registered alarms from the indoor unit and all board-internal alarms are emitted via
the output. In addition, the error code can be displayed on the 7-segment display (see
“4.3.5 Status signals“ on page 151).
X4b-K2
Compressor signal/
operating signal
Either a compressor signal or operating signal is displayed, depending on DIP switch
S22 (see “4.3.5 Status signals“ on page 151).
X4c-K3
Defrost signal/heating
signal
Either a defrost signal or heating signal is displayed, depending on DIP switch S22
(see “4.3.5 Status signals“ on page 151).