GE CC-SCSTAT User Manual download pdf (Page 38)

SmartCommand Thermostat

Installation Manual

Standard HVAC system quick test

You can do a quick test of the HVAC system by shorting across the appropriate terminals on the HVAC

system’s thermostat connector. Use a short 6-in. wire to connect across the terminals shown in Table 1.

Heat pump system quick test

You can do a quick test for heat pump operation by shorting across the appropriate terminals on the heat pump

system’s thermostat connector. Note that heat pumps have an additional thermostat terminal (O) for the

changeover valve. The changeover valve determines whether heating or cooling is provided. Typical heat

pump systems have changeover with cooling and require the O terminal to be powered to get cooling

operation. Use a short 6-inch wire to connect across the terminals as shown in Table 2.

Note: If you have the CO selection incorrect, you will get cooling when you expect heating and vice versa. Change the DIP

switch SW1-2 changeover setting to correct this problem.

Table 1. Standard system quick test

Function test HVAC terminals Result

Fan R to G Fan should come on.

Heating R to W Heat cycle should start for heating.

Cooling R to Y and G Compressor and fan should start for cooling.

Table 2. Heat pump system quick test

Function test HVAC terminals Result

Fan R to G Fan should come on.

Heating R to Y and G Compressor and fan should start and heating occurs.

Cooling R to Y and G and O Compressor and fan should start. CO valve operates

and cooling occurs.

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GE CC-SCSTAT User Manual Page 38