Refco 4688091 Manual De Instrucciones página 4

Performing the Tests – Checking the Data Flow
This is a simple data connections check and does not need to be an inverter driven system.
When the system is operating, data flows between the outdoor unit printed circuit board and
the indoor unit printed circuit board.
1. To check the data flow, connect the red and black data probes to the terminal feeding the
indoor unit.
2. With the system on and operating you should see at least one of the data lights flashing.
The make and model of your system will determine if both data lights flash or only one.
This flashing is not symmetrical and varies in intensity and frequency depending on the
type and amount of data being transmitted.
3. If you have no data lights flashing, then check that the connecting cable is not damaged
and that the connections at both ends are made properly. Also check that the outdoor unit
and indoor unit are grounded/earthed to each other.