CompTrol Interface V4.0.x | Issue 21-05-2021 | 1000932 27
Functions of the CompTrol Interface expansion module
The following dierences in temperature cause the fan speed to change:
Temperaturedierence Fan speed
< 2 K F1
2 to 3 K F2
> 3 K F3
Table 10: Fan speeds dependent on temperature dierence
Automatic fan speed control is available in programs 0, 2 and 4 to 7.
5.3.2 Forced mode
When forced mode is activated, the current status of digital input D1 is constantly transferred to
the indoor unit via the X/Y remote control bus. The indoor unit can then no longer be switched via
the relevant wired remote control.
This function is activated/deactivated via DIP switch S2-5.
Forced mode can be enabled in the following programs:
– Programs 0 and 3 to 9.
5.3.3 Inversion of digital outputs
DIP switch S2-6 determines the logic behavior of the relays. The switching function of the relays
can be inverted with DIP switch S2-6. Options “NO” and “NC” are available. The position of DIP
switch S2-6 always aects all digital outputs simultaneously. It is not possible to invert a single
digital output.
NO (normally open)
If no signal is present, the relay is de-energized and the contact is open. If a signal is present, the
relay is energized and the contact is closed.
NC (normally closed)
If no signal is present, the relay is energized and the contact is closed. If a signal is present, the
relay is de-energized and the contact is open.
Inversion of digital outputs is possible in all programs.
5.3.4 Signal boundary value monitoring
If a signal exceeds or falls below a boundary value at analog input X3-S, the temperature setpoint
23 °C is transferred to the indoor units. The temperature setpoint 23 °C is also transferred if ana-
log input X3-S is open.
The relevant types of analog signal and the signal boundary values are set out in the table below:
Analog signal type Signal boundary value Speciedtemperaturesetpoint
4-20 mA ≤ 4.3 / > 19.7 mA 23 °C
0-20 mA ≤ 0.4 / > 19.6 mA 23 °C
0-10 V DC ≤ 0.2 / > 9.8 V DC 23 °C
0-5 V DC ≤ 0.1 / > 4.9 V DC 23 °C
Table 11: Signal boundary values for signal boundary value monitoring
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