T949_O: Backup Ht-Amb Temp Too Low For HP
Status
Non-critical fault. Operation is transferred to backup heat until outdoor air temp is above -30F
Description
The heat pump controller has determined that the ambient air tempreature is too low for heat-pump heating. Operation is switched to backup heating.
Expected Operation
Heating operation will be transferred to backup heating source when outdoor air temperature is measured to be critically low (less than -30F). This is considered normal operation in response to such low temperatures.
Cause
The heat pump controller has determined that the ambient air tempreature is too low for heat-pump heating. Operation is switched to backup heating.
Solution
