Stulz EC Tower ECD 91 - 6.7 Connection diagram for Program 8; 7. Starting up the Interface III k; 7.1 Initialization; 7.2 Initialization sequence

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ec tower technical manual
6.7 Connection diagram for Program 8
Procedure
1. Connect the Interface
IIIk as shown in the connection diagram below.
Digital outputs X4
Digital inputs X2
X4a-K1 alarm signal
+0...10 V DC
Analog input
Frequency setpoint
Ground
X/Y remote
controller bus
D1 remote ON/OFF
D2 cooling/heating mode
D3 center/remote center
D4 evaluate analog input
24-230 V AC/
20-130 V DC
X4b-K2
see table
"Digital outputs in program 8"
X4c-K3
1222310
7. Starting up the InterfaceIIIk
7.1 Initialization
The initialization phase commences when the InterfaceIIIk is connected to the X/Y remote control bus.
During this initialization phase, only the 7-segment display is active. None of the digital outputs or inputs are
active. The InterfaceIIIk ignores changes to the input signals during the initialization phase.
7.2 Initialization sequence
1. Both dots on the 7-segment display light up for 3 seconds.
2. The individual segments of the 7-segment display flash in a synchronous cycle as a display self-test.
3. The software version number, e.g. “3.9”, is shown for approximately 1 second.
4. A countdown ticks down.
- If the InterfaceIIIk is configured as a slave, the countdown runs from 3 to 0: duration approx. 1 second.
- If the InterfaceIIIk is configured as master, the countdown runs from 15 to 0: duration up to 3 minutes.
5. After the countdown, the number of the selected program is shown for approx. 1 second, e.g. “08” for Pro-
gram 8.
6. Next, the parameters set via DIP switches S27 and S28 are shown.