3M 22 - Manual (Page 9)

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FAN Switch
The fan control is normally in AUTO mode, meaning that the fan operates
automatically with the HVAC system and the thermostat. When the fan switch is in ON, the fan will run
continuously until switched back to AUTO.
NOTE: Fan ON function is available in the OFF mode to allow simple ventilating.
EMER HEAT If you set your 3M-22 for HEAT PUMP with auxiliary heat, EMER function is
available with a switch under the top cover on the right. If you switch EMER to ON, your HEAT PUMP
is disabled and auxiliary heat is your sole source of heat. This manual override stays active until you
switch EMER off. Auxiliary heat is more expensive than the heat pump so use EMER only if the heat
pump cannot keep up or is defective.
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RESET button
The RESET button re-boots the 3M-22 processor. It does not effect the user
programs that have been stored in permanent memory.
Compressor Protection The 3M-22 has a minimum cycle time of 4 minutes to protect your
compressor in cool and in heat pump (if you have one). During this time the compressor will not come
on until the 4 minute delay is over.
Simple Screen This display mode limits the amount of information on screen and limits the
functions to just the + and - buttons.
To access the Simple Screen hold down both + and - buttons at the same time for 10 seconds.
To leave the Simple Screen hold down both + and - buttons at the same time for 10 seconds.