Operation Manual

12
Feature set up with dry contacts (Input)
The input dry contacts are used for controlling an external circuitry which may include a switch or a
relay should be used for closing the internal circuit to indicate that some change is required.
A wire of up to 1.5mm
2
is recommended to be used.
Note: NO external power should be used in this case!
Night Mode quiet operation
When “Night” dry contact is shorted, the unit will enter to a special mode and reduce the
compressor and outdoor fans speed to allow quiet operation.
Stand-By
When “SB” dry contact is shorted, the unit will stop and go to stand by mode.
Power Shedding
When “PWS” dry contact is shorted, the unit will limits its maximum power consumption according
to a pre defined value. This value can be changed via the display board (see above procedure).
Feature set up with dry contacts (Output)
Alarm
The alarm dry contacts is used to indicate a problem or any malefunction of the system.
An internal relay is used to close an external circuit which may include an external power supply.
The external circuit should include some kind of a load (lightening bulb, LED, etc).
Open – Normal Operation
Shorted – Quiet operation
Open – Normal Operation
Shorted – Stand by
Open – Normal Operation
Shorted – Power Shedding