I hope the following info from the Svc Manual comes out ok. I took it out of a PDF file.
Heat Pump Example To Bring On Gas Furnace As Backup Heat
Setpoint Indoor Temp. Operation
70 70+ No functions occur
\\\ 69 Heat Pump turns on (Primary heat source)
71 Heat Pump turns off (Thermostat satisfied)
69 Heat Pump turns on
65 Gas Furnace turns on, Heat Pump turns off (Heat Pump not able to satisfy Thermostat) (First strike for backup heat counter)
71 Gas Furnace turns off (Thermostat satisfied)
69 Heat Pump turns on
65 Gas Furnace turns on, Heat Pump turns off (Heat Pump is again unable to satisfy Thermostat), (Backup heat counter reaches 3rd strike and Heat Pump is locked out for 2 hours), backup heat counter is reset if Heat
Pump is running for more than 20 minutes and does not call for backup heat
71 Gas Furnace turns off (Thermostat satisfied)
69 Gas Furnace turns off (Becomes Primary heat source)
71 Gas Furnace turns off (Thermostat Satisfied)
\\\ After 2 hour lockout
69 Heat Pump turns on (Resumes as Primary heat source)
65 Gas Furnace turns on, Heat Pump turns off (Becomes Primary heat source) (Heat Pump is locked out for another 2 hours)
71 Gas Furnace turns off (Thermostat Satisfied)
\\\ After 2 hour lockout
69 Heat Pump turns on (Resumes as Primary heat source)
71 Heat Pump turns off (Thermostat Satisfied) (Backup heat counter is
reset any time Heat Pump satisfies thermostat setpoint and does not need Gas Furnace)
The word "DIFF" will display on LCD when backup heat is operating and the heat pump is locked out. There is a 30 second delay between
Stage 1 and Stage 2. There is also a 3 minute anti-short cycle delay time for cooling.
The manual indicates heat pump will shut off between 25-40 deg F.
The water you see is frost melting off the outside coil. This is normal during heat pump operation & will depend of humidity.
There is a freeze thermister located on the outside coil, it opens at 18 deg +/- 3 deg, and closes at 38 deg +/- 3 deg, actual coil temp.
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Dan & Sharon (Zena-Our Yorkie Puppy)(Kasey-Our Yorkie Puppy RIP 9Jan05-26Jul17) On the Road (2012 Journey 36M, 2020 Chevy Equinox)
USN-Ret ('65-'93) Fulltimers, Class of 2012
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