77
Symptom
Possible Cause
Action
Cannot set the
system setting to
Heat or Cool.
System Type is set to Cool
Only or Heat Only or Heat
Only with Fan.
Set System Type (Installer Setup
Number 0170) to match the
installed equipment.
Heat On is not in the
display.
System is not set to Heat
and/or temperature is not
above room temperature.
Set the system setting to Heat
and set the temperature setting
above the room temperature.
Cool On is not in the
display.
System is not set to Cool
and/or temperature is not
below room temperature.
Set the system setting to Cool
and set the temperature setting
below the room temperature.
Summary of Contents for MST03
Page 1: ...MRCOOL Universal WiFi Thermostat...
Page 2: ......
Page 4: ......
Page 11: ...7 Fig 1 Thermostat Dimensions in inches mm...
Page 12: ...8 Fig 2 Thermostat back case dimensions in inches mm...
Page 13: ...9 Fig 3 Thermostat cover plate dimensions in inches mm...
Page 14: ...10 Fig 4 Selecting thermostat location...
Page 16: ...12 Fig 5 Mounting wall plate...
Page 20: ...16 Fig 7 Inserting wires in terminal block IMPORTANT Use 18 gauge thermostat wire...
Page 35: ...31 Fig 21 Mount thermostat to wall plate...
Page 48: ...44 OPERATION Fig 23 Thermostat Keys Fan Choose fan mode...
Page 49: ...45 Fig 24 Thermostat Display...
Page 64: ...60 Fig 33 Fig 34 4 Press the key on thermostat screen until the flash Fig 35...
