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6 Optional functions
Defrost operation signal (04)
This optional signal is used to pick up when defrosting turns on. It is very useful to check if the indoor unit is in thermo-OFF.
Connect the cabling and use the materials as shown in
Available
ports, see on page 162
Note that the contact of auxiliary relay X3 is closed when an operation signal is issued.
6.1.5 Optional functions
Programming
The optional signals are programmed through the PCB of the outdoor unit.
Setting of the optional signals
The optional signals of the outdoor unit are set up from the PCB of the outdoor unit and push switches PSW1, PSW2 and
PSW3.
6
167
SMGB0060 rev. 1- 12/2010
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Troubleshooting
