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CompTrol Interface V4.0.x | Issue 21-05-2021 | 1000932
Program 8 – direct frequency request
14 Program 8 –
direct frequency request
14.1 Description
The compressor frequency of the outdoor unit can be adjusted via an analog signal from an exter
-
nal controller.
In addition, the digital inputs can be used to switch on Cooling or Heating modes and to adjust the
fan speed.
The functions of forced mode and inversion of digital outputs can optionally be used.
The indoor unit can be switched on or off using remote ON/OFF.
The operating, compressor, heating, or defrost signals are emitted via the digital outputs. In the
event of a system error, an alarm signal is emitted via a digital output.
Direct frequency request is available with the following unit series from Mitsubishi Heavy
Industries:
●
FDS series
●
S series
Direct frequency request cannot be used with KX and SX series air conditioning units.
14.2
Configuring the CompTrol Interface for
program 8
IMPORTANT
●
If you switch from program 8, 9, or 10 to programs 0 and 2 to 7 without cutting the power first,
the control behavior of the air conditioning system will be adversely affected.
●
Disconnect all components of the air conditioning system from the electrical supply before
switching from program 8, 9, or 10 to programs 0 and 2 to 7. Then restart all the components
of the air conditioning system (indoor units, outdoor units, CompTrol Interface, wired remote
control, heat exchanger connection module, etc.).
Note
●
Only set DIP switches when they are disconnected from the electrical supply. Changed set
-
tings only reliably become effective after a system restart. An exception here are DIP switches
S2-7
and
S2-8
, which govern the behavior of the 7-segment display. These DIP switches for
display behavior can also be set during ongoing operation.
●
When reading the current DIP switch positions, bear in mind the horizontal installation posi
-
tion of the CompTrol Interface! The
ON
switch setting is the one closest to the center of the
expansion module.
●
Set inoperative DIP switches to
OFF
.
14.2.1 Connection diagram for program 8
Note
Pay attention to the information on installation and start-up (see
Summary of Contents for CompTrol
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