If I have the correct manual for your unit on page 1 it mentions the mode setting on the thermostats remote unit.
The thermostats remote has a selectable mode, if it is in on mode the stove will be on, if it is in off mode the stove will be off, it will only answer to temperature settings if it is in THERMO mode.
ETA: IN addition the receiver has to be set to Remote operation mode. Otherwise it will either be on and not respond to the remote or off. In on mode the stove will keep right on doing what it was doing and be controllable by its on/off switch.
The thermostats remote has a selectable mode, if it is in on mode the stove will be on, if it is in off mode the stove will be off, it will only answer to temperature settings if it is in THERMO mode.
ETA: IN addition the receiver has to be set to Remote operation mode. Otherwise it will either be on and not respond to the remote or off. In on mode the stove will keep right on doing what it was doing and be controllable by its on/off switch.