adjustment; turning the unit off and back on before pressures equalize puts stress on unit compressor.
Fan Switch
In AUTO or INT (intermittent) mode, the blower operates only when the thermostat calls for heating or cooling. This mode is generally preferred when humidity control is a priority. The ON or CONT mode provides continuous indoor blower operation, regardless of whether the compressor or auxiliary heat are operating. This mode is required when constant air circulation or filtering is desired.
System Switch
Set the system switch for heating, cooling, or auto opera- tion. The auto mode allows the heat pump to automatically switch from heating mode to cooling mode to maintain predetermined comfort settings. Many heat pump thermo- stats are also equipped with an emergency heat mode which locks out heat pump operation and provides temporary heat supplied by the auxiliary heat.
Indicating Light
Most heat pump thermostats have an amber light which indicates when the heat pump is operating in the emer- gency heat mode.
Temperature Indicator
The temperature indicator displays the actual room temperature.
Programmable Thermostats
Your system may be controlled by a programmable thermo- stat. These thermostats provide the added feature of programmable
Preservice Check
If your system fails to operate, check the following before calling for service:
•Check to see that all electrical disconnect switches are ON.
•Make sure the thermostat temperature selector is properly set.
•Make sure the thermostat system switch is properly set.
•Replace any blown fuses, or reset circuit breakers.
•Make sure unit access panels are in place.
•Make sure air filter is clean.
•Locate unit model number and have it handy before calling.
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