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How to connect a thermostat in multi-system heat pum

[QUOTE=Nassoma;2492076]how to connect a thermostat in multi-system heat pump air conditionning unit

Nassoma, you have registered successfully, as you can see from your posts above.

I changed your subject line from "registrat" to "how to connect a thermostat"

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Follow the install instructions

If the wiring are as they should be
Its red to r
Green to g
White to w
Yellow to y
Orange to o

It would help to know the tstat brand and model number, and any other info you could provide
Brand and model of heatpump,name and model of furnace/airhandler

For one, you need to know the # of stages of heating and cooling and whether aux/em heat is used.

If this is a replacement thermostat then tell us what the connected terminals are. We can then advise what characteristics you need in a stat.