CompTrol Interface V4.0.x | Issue 21-05-2021 | 1000932 73
Program 8 – direct frequency request
14.5 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 o via
the digital input. Forced mode can be activated with DIP switch S2-5
(see “5.2.2 Remote ON/OFF” on page 26).
X2a-D2
Cooling/Heating
mode
If a signal is applied, the air conditioning unit runs in Cooling mode. If no
signal is applied, the air conditioning unit runs in Heating mode.
X2b-D3
Center/
Center-Remote
When voltage is applied, the CompTrol Interface operates in Center
mode and the wired remote control is disabled. Without voltage, the
CompTrol Interface and the wired remote control operate in Center-Re-
mote mode (see “5.2.4 Center/Center-Remote” on page 26).
X2b-D4
Analog input
evaluation
Analog input X3-S is only evaluated if a signal is applied to X2b-D4 (see
“5.2.1 Evaluating the analog input” on page 25). If no signal is
applied, a setpoint can be specied via the wired remote control.
X2c-D5
Fan speed F1
(low)
The signal switches the indoor unit to fan speed F1. The fan speed can
then no longer be changed using the wired remote control. If auto-
matic fan speed control is activated, digital input D5 is no longer evalu-
ated (see “5.3.1 Automatic fan speed control” on page 26).
X2c-D6
Fan speed F2
(medium)
The signal switches the indoor unit to fan speed F2. The fan speed can
then no longer be changed using the wired remote control. If auto-
matic fan speed control is activated, digital input D6 is no longer evalu-
ated (see “5.3.1 Automatic fan speed control” on page 26).
X2c-D5
and
X2c-D6
Fan speed F3
(high)
If fan speed F1 and fan speed F2 signals are both applied simultane-
ously, the indoor unit switches to fan speed F3. The fan speed can then
no longer be changed using the wired remote control. If automatic fan
speed control is activated, digital inputs D5 and D6 are no longer evalu-
ated (see “5.3.1 Automatic fan speed control” on page 26).
Table 52: Digital inputs in program 8
14.6 Digital output assignment in program 8
Output Function Description
X4a-I Alarm signal
All alarms registered by the indoor unit, plus internal expansion mod-
ule alarms, are indicated via the output. In addition, the error code
can be displayed on the 7-segment display (see “4.7 7-segment dis-
play” on page 21).
X4b-II
Compressor signal/
operating signal
Either a compressor signal or operating signal is displayed, depend-
ing on DIP switch S2-2 (see “5.3.7 Status signals” on page 29).
X4c-III
Defrost signal/heat-
ing signal
Either a defrost signal or heating signal is displayed, depending on
DIP switch S2-2 (see “5.3.7 Status signals” on page 29).
Table 53: Digital outputs in program 8
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