73
Symptom
Possible Cause
Action
Heating or cooling
does not come on.
Thermostat minimum
off-time is activated.
Wait up to five minutes for the
system to respond.
Sy stem selection is not set
to Heat or Cool.
Set system selection to correct
position.
System type selection is
incorrect.
Check Installer Setup Number
0170 and make sure correct
system type is chosen.
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...